Federal regulations · Through 2026-08-25 · Newer source version available

49 CFR 173.435: Table of A1 and A2 values for radionuclides.

The table of A1 and A2 values for radionuclides is as follows:
Symbol of radionuclide Element and atomic number A1 (TBq) A1 (Ci) b A2 (TBq) A2 (Ci) b Specific activity
(TBq/g) (Ci/g)
Ac-225 (a) Actinium (89) 8.0 × 10−1 2.2 × 101 6.0 × 10−3 1.6 × 10−1 2.1 × 103 5.8 × 104
Ac-227 (a) 9.0 × 10−1 2.4 × 101 9.0 × 10−5 2.4 × 10−3 2.7 7.2 × 101
Ac-228 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 8.4 × 104 2.2 × 106
Ag-105 Silver (47) 2.0 5.4 × 101 2.0 5.4 × 101 1.1 × 103 3.0 × 104
Ag-108m (a) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 9.7 × 10−1 2.6 × 101
Ag-110m (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.8 × 102 4.7 × 103
Ag-111 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 5.8 × 103 1.6 × 105
Al-26 Aluminum (13) 1.0 × 10−1 2.7 1.0 × 10−1 2.7 7.0 × 10−4 1.9 × 10−2
Am-241 Americium (95) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 1.3 × 10−1 3.4
Am-242m (a) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 3.6 × 10−1 1.0 × 101
Am-243 (a) 5.0 1.4 × 102 1.0 × 10−3 2.7 × 10−2 7.4 × 10−3 2.0 × 10−1
Ar-37 Argon (18) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.7 × 103 9.9 × 104
Ar-39 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 1.3 3.4 × 101
Ar-41 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.5 × 106 4.2 × 107
As-72 Arsenic (33) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 6.2 × 104 1.7 × 106
As-73 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 8.2 × 102 2.2 × 104
As-74 1.0 2.7 × 101 9.0 × 10−1 2.4 × 101 3.7 × 103 9.9 × 104
As-76 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.8 × 104 1.6 × 106
As-77 2.0 × 101 5.4 × 102 7.0 × 10−1 1.9 × 101 3.9 × 104 1.0 × 106
At-211 (a) Astatine (85) 2.0 × 101 5.4 × 102 5.0 × 10−1 1.4 × 101 7.6 × 104 2.1 × 106
Au-193 Gold (79) 7.0 1.9 × 102 2.0 5.4 × 101 3.4 × 104 9.2 × 105
Au-194 1.0 2.7 × 101 1.0 2.7 × 101 1.5 × 104 4.1 × 105
Au-195 1.0 × 101 2.7 × 102 6.0 1.6 × 102 1.4 × 102 3.7 × 103
Au-198 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 9.0 × 103 2.4 × 105
Au-199 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 7.7 × 103 2.1 × 105
Ba-131 (a) Barium (56) 2.0 5.4 × 101 2.0 5.4 × 101 3.1 × 103 8.4 × 104
Ba-133 3.0 8.1 × 101 3.0 8.1 × 101 9.4 2.6 × 102
Ba-133m 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 2.2 × 104 6.1 × 105
Ba-140 (a) 5.0 × 10−1 1.4 × 101 3.0 × 10−1 8.1 2.7 × 103 7.3 × 104
Be-7 Beryllium (4) 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 1.3 × 104 3.5 × 105
Be-10 4.0 × 101 1.1 × 103 6.0 × 10−1 1.6 × 101 8.3 × 10−4 2.2 × 10−2
Bi-205 Bismuth (83) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 1.5 × 103 4.2 × 104
Bi-206 3.0 × 10−1 8.1 3.0 × 10−1 8.1 3.8 × 103 1.0 × 105
Bi-207 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 1.9 5.2 × 101
Bi-210 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 4.6 × 103 1.2 × 105
Bi-210m (a) 6.0 × 10−1 1.6 × 101 2.0 × 10−2 5.4 × 10−1 2.1 × 10−5 5.7 × 10−4
Bi-212 (a) 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 5.4 × 105 1.5 × 107
Bk-247 Berkelium (97) 8.0 2.2 × 102 8.0 × 10−4 2.2 × 10−2 3.8 × 10−2 1.0
Bk-249 (a) 4.0 × 101 1.1 × 103 3.0 × 10−1 8.1 6.1 × 101 1.6 × 103
Br-76 Bromine (35) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 9.4 × 104 2.5 × 106
Br-77 3.0 8.1 × 101 3.0 8.1 × 101 2.6 × 104 7.1 × 105
Br-82 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.0 × 104 1.1 × 106
C-11 Carbon (6) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.1 × 107 8.4 × 108
C-14 4.0 × 101 1.1 × 103 3.0 8.1 × 101 1.6 × 10−1 4.5
Ca-41 Calcium (20) Unlimited Unlimited Unlimited Unlimited 3.1 × 10−3 8.5 × 10−2
Ca-45 4.0 × 101 1.1 × 103 1.0 2.7 × 101 6.6 × 102 1.8 × 104
Ca-47 (a) 3.0 8.1 × 101 3.0 × 10−1 8.1 2.3 × 104 6.1 × 105
Cd-109 Cadmium (48) 3.0 × 101 8.1 × 102 2.0 5.4 × 101 9.6 × 101 2.6 × 103
Cd-113m 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 8.3 2.2 × 102
Cd-115 (a) 3.0 8.1 × 101 4.0 × 10−1 1.1 × 101 1.9 × 104 5.1 × 105
Cd-115m 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 9.4 × 102 2.5 × 104
Ce-139 Cerium (58) 7.0 1.9 × 102 2.0 5.4 × 101 2.5 × 102 6.8 × 103
Ce-141 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 1.1 × 103 2.8 × 104
Ce-143 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 2.5 × 104 6.6 × 105
Ce-144 (a) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.2 × 102 3.2 × 103
Cf-248 Californium (98) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 5.8 × 101 1.6 × 103
Cf-249 3.0 8.1 × 101 8.0 × 10−4 2.2 × 10−2 1.5 × 10−1 4.1
Cf-250 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 4.0 1.1 × 102
Cf-251 7.0 1.9 × 102 7.0 × 10−4 1.9 × 10−2 5.9 × 10−2 1.6
Cf-252 1 × 10−1 2.7 3.0 × 10−3 8.1 × 10−2 2.0 × 10 1 5.4 × 10 2
Cf-253 (a) 4.0 × 101 1.1 × 103 4.0 × 10−2 1.1 1.1 × 103 2.9 × 104
Cf-254 1.0 × 10−3 2.7 × 10−2 1.0 × 10−3 2.7 × 10−2 3.1 × 102 8.5 × 103
Cl-36 Chlorine (17) 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 1.2 × 10−3 3.3 × 10−2
Cl-38 2.0 × 10−1 5.4 2.0 × 10−1 5.4 4.9 × 106 1.3 × 108
Cm-240 Curium (96) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 7.5 × 102 2.0 × 104
Cm-241 2.0 5.4 × 101 1.0 2.7 × 101 6.1 × 102 1.7 × 104
Cm-242 4.0 × 101 1.1 × 103 1.0 × 10−2 2.7 × 10−1 1.2 × 102 3.3 × 103
Cm-243 9.0 2.4 × 102 1.0 × 10−3 2.7 × 10−2 1.9 5.2 × 101
Cm-244 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 3.0 8.1 × 101
Cm-245 9.0 2.4 × 102 9.0 × 10−4 2.4 × 10−2 6.4 × 10−3 1.7 × 10−1
Cm-246 9.0 2.4 × 102 9.0 × 10−4 2.4 × 10−2 1.1 × 10−2 3.1 × 10−1
Cm-247 (a) 3.0 8.1 × 101 1.0 × 10−3 2.7 × 10−2 3.4 × 10−6 9.3 × 10−5
Cm-248 2.0 × 10−2 5.4 × 10−1 3.0 × 10−4 8.1 × 10−3 1.6 × 10−4 4.2 × 10−3
Co-55 Cobalt (27) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.1 × 105 3.1 × 106
Co-56 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.1 × 103 3.0 × 104
Co-57 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 3.1 × 102 8.4 × 103
Co-58 1.0 2.7 × 101 1.0 2.7 × 101 1.2 × 103 3.2 × 104
Co-58m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 2.2 × 105 5.9 × 106
Co-60 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.2 × 101 1.1 × 103
Cr-51 Chromium (24) 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 3.4 × 103 9.2 × 104
Cs-129 Cesium (55) 4.0 1.1 × 102 4.0 1.1 × 102 2.8 × 104 7.6 × 105
Cs-131 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 3.8 × 103 1.0 × 105
Cs-132 1.0 2.7 × 101 1.0 2.7 × 101 5.7 × 103 1.5 × 105
Cs-134 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 4.8 × 101 1.3 × 103
Cs-134m 4.0 × 101 1.1 × 103 6.0 × 10−1 1.6 × 101 3.0 × 105 8.0 × 106
Cs-135 4.0 × 101 1.1 × 103 1.0 2.7 × 101 4.3 × 10−5 1.2 × 10−3
Cs-136 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.7 × 103 7.3 × 104
Cs-137 (a) 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 3.2 8.7 × 101
Cu-64 Copper (29) 6.0 1.6 × 102 1.0 2.7 × 101 1.4 × 105 3.9 × 106
Cu-67 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 2.8 × 104 7.6 × 105
Dy-159 Dysprosium (66) 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 2.1 × 102 5.7 × 103
Dy-165 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 3.0 × 105 8.2 × 106
Dy-166 (a) 9.0 × 10−1 2.4 × 101 3.0 × 10−1 8.1 8.6 × 103 2.3 × 105
Er-169 Erbium (68) 4.0 × 101 1.1 × 103 1.0 2.7 × 101 3.1 × 103 8.3 × 104
Er-171 8.0 × 10−1 2.2 × 101 5.0 × 10−1 1.4 × 101 9.0 × 104 2.4 × 106
Eu-147 Europium (63) 2.0 5.4 × 101 2.0 5.4 × 101 1.4 × 103 3.7 × 104
Eu-148 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.0 × 102 1.6 × 104
Eu-149 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 3.5 × 102 9.4 × 103
Eu-150 (short lived) 2.0 5.4 × 101 7.0 × 10−1 1.9 × 101 6.1 × 104 1.6 × 106
Eu-150 (long lived) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 6.1 × 104 1.6 × 106
Eu-152 1.0 2.7 × 101 1.0 2.7 × 101 6.5 1.8 × 102
Eu-152m 8.0 × 10−1 2.2 × 101 8.0 × 10−1 2.2 × 101 8.2 × 104 2.2 × 106
Eu-154 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 9.8 2.6 × 102
Eu-155 2.0 × 101 5.4 × 102 3.0 8.1 × 101 1.8 × 101 4.9 × 102
Eu-156 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 2.0 × 103 5.5 × 104
F-18 Fluorine (9) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.5 × 106 9.5 × 107
Fe-52 (a) Iron (26) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.7 × 105 7.3 × 106
Fe-55 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 8.8 × 101 2.4 × 103
Fe-59 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 1.8 × 103 5.0 × 104
Fe-60 (a) 4.0 × 101 1.1 × 103 2.0 × 10−1 5.4 7.4 × 10−4 2.0 × 10−2
Ga-67 Gallium (31) 7.0 1.9 × 102 3.0 8.1 × 101 2.2 × 104 6.0 × 105
Ga-68 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.5 × 106 4.1 × 107
Ga-72 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.1 × 105 3.1 × 106
Gd-146 (a) Gadolinium (64) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.9 × 102 1.9 × 104
Gd-148 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 1.2 3.2 × 101
Gd-153 1.0 × 101 2.7 × 102 9.0 2.4 × 102 1.3 × 102 3.5 × 103
Gd-159 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 3.9 × 104 1.1 × 106
Ge-68 (a) Germanium (32) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.6 × 102 7.1 × 103
Ge-71 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.8 × 103 1.6 × 105
Ge-77 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.3 × 105 3.6 × 106
Hf-172 (a) Hafnium (72) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 4.1 × 101 1.1 × 103
Hf-175 3.0 8.1 × 101 3.0 8.1 × 101 3.9 × 102 1.1 × 104
Hf-181 2.0 5.4 × 101 5.0 × 10−1 1.4 × 101 6.3 × 102 1.7 × 104
Hf-182 Unlimited Unlimited Unlimited Unlimited 8.1 × 10−6 2.2 × 10−4
Hg-194 (a) Mercury (80) 1.0 2.7 × 101 1.0 2.7 × 101 1.3 × 10−1 3.5
Hg-195m (a) 3.0 8.1 × 101 7.0 × 10−1 1.9 × 101 1.5 × 104 4.0 × 105
Hg-197 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 9.2 × 103 2.5 × 105
Hg-197m 1.0 × 101 2.7 × 102 4.0 × 10−1 1.1 × 101 2.5 × 104 6.7 × 105
Hg-203 5.0 1.4 × 102 1.0 2.7 × 101 5.1 × 102 1.4 × 104
Ho-166 Holmium (67) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 2.6 × 104 7.0 × 105
Ho-166m 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 6.6 × 10−2 1.8
I-123 Iodine (53) 6.0 1.6 × 102 3.0 8.1 × 101 7.1 × 104 1.9 × 106
I-124 1.0 2.7 × 101 1.0 2.7 × 101 9.3 × 103 2.5 × 105
I-125 2.0 × 101 5.4 × 102 3.0 8.1 × 101 6.4 × 102 1.7 × 104
I-126 2.0 5.4 × 101 1.0 2.7 × 101 2.9 × 103 8.0 × 104
I-129 Unlimited Unlimited Unlimited Unlimited 6.5 × 10−6 1.8 × 10−4
I-131 3.0 8.1 × 101 7.0 × 10−1 1.9 × 101 4.6 × 103 1.2 × 105
I-132 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.8 × 105 1.0 × 107
I-133 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 4.2 × 104 1.1 × 106
I-134 3.0 × 10−1 8.1 3.0 × 10−1 8.1 9.9 × 105 2.7 × 107
I-135 (a) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.3 × 105 3.5 × 106
In-111 Indium (49) 3.0 8.1 × 101 3.0 8.1 × 101 1.5 × 104 4.2 × 105
In-113m 4.0 1.1 × 102 2.0 5.4 × 101 6.2 × 105 1.7 × 107
In-114m (a) 1.0 × 101 2.7 × 102 5.0 × 10−1 1.4 × 101 8.6 × 102 2.3 × 104
In-115m 7.0 1.9 × 102 1.0 2.7 × 101 2.2 × 105 6.1 × 106
Ir-189 (a) Iridium (77) 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 1.9 × 103 5.2 × 104
Ir-190 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 2.3 × 103 6.2 × 104
Ir-192 (c) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.4 × 102 9.2 × 103
Ir-194 3.0 × 10−1 8.1 3.0 × 10−1 8.1 3.1 × 104 8.4 × 105
K-40 Potassium (19) 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 2.4 × 10−7 6.4 × 10−6
K-42 2.0 × 10−1 5.4 2.0 × 10−1 5.4 2.2 × 105 6.0 × 106
K-43 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 1.2 × 105 3.3 × 106
Kr-79 Krypton (36) 4.0 × 10 0 1.1 × 10 2 2.0 × 10 0 5.4 × 10 1 4.2 × 10 4 1.1 × 10 6
Kr-81 Krypton (36) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 7.8 × 10−4 2.1 × 10−2
Kr-85 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 1.5 × 101 3.9 × 102
Kr-85m 8.0 2.2 × 102 3.0 8.1 × 101 3.0 × 105 8.2 × 106
Kr-87 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.0 × 106 2.8 × 107
La-137 Lanthanum (57) 3.0 × 101 8.1 × 102 6.0 1.6 × 102 1.6 × 10−3 4.4 × 10−2
La-140 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 2.1 × 104 5.6 × 105
Lu-172 Lutetium (71) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 4.2 × 103 1.1 × 105
Lu-173 8.0 2.2 × 102 8.0 2.2 × 102 5.6 × 101 1.5 × 103
Lu-174 9.0 2.4 × 102 9.0 2.4 × 102 2.3 × 101 6.2 × 102
Lu-174m 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 2.0 × 102 5.3 × 103
Lu-177 3.0 × 101 8.1 × 102 7.0 × 10−1 1.9 × 101 4.1 × 103 1.1 × 105
Mg-28 (a) Magnesium (12) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.0 × 105 5.4 × 106
Mn-52 Manganese (25) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.6 × 104 4.4 × 105
Mn-53 Unlimited Unlimited Unlimited Unlimited 6.8 × 10−5 1.8 × 10−3
Mn-54 1.0 2.7 × 101 1.0 2.7 × 101 2.9 × 102 7.7 × 103
Mn-56 3.0 × 10−1 8.1 3.0 × 10−1 8.1 8.0 × 105 2.2 × 107
Mo-93 Molybdenum (42) 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 4.1 × 10−2 1.1
Mo-99(a)(i) 1.0 2.7 × 10 1 6.0 × 10−1 1.6 × 10 1 1.8 × 10 4 4.8 × 10 5
N-13 Nitrogen (7) 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 5.4 × 107 1.5 × 109
Na-22 Sodium (11) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.3 × 102 6.3 × 103
Na-24 2.0 × 10−1 5.4 2.0 × 10−1 5.4 3.2 × 105 8.7 × 106
Nb-93m Niobium (41) 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 8.8 2.4 × 102
Nb-94 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 6.9 × 10−3 1.9 × 10−1
Nb-95 1.0 2.7 × 101 1.0 2.7 × 101 1.5 × 103 3.9 × 104
Nb-97 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 9.9 × 105 2.7 × 107
Nd-147 Neodymium (60) 6.0 1.6 × 102 6.0 × 10−1 1.6 × 101 3.0 × 103 8.1 × 104
Nd-149 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 4.5 × 105 1.2 × 107
Ni-59 Nickel (28) Unlimited Unlimited Unlimited Unlimited 3.0 × 10−3 8.0 × 10−2
Ni-63 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 2.1 5.7 × 101
Ni-65 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 7.1 × 105 1.9 × 107
Np-235 Neptunium (93) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.2 × 101 1.4 × 103
Np-236 (short-lived) 2.0 × 101 5.4 × 102 2.0 5.4 × 101 4.7 × 10−4 1.3 × 10−2
Np-236 (long-lived) 9.0 × 100 2.4 × 102 2.0 × 10−2 5.4 × 10−1 4.7 × 10−4 1.3 × 10−2
Np-237 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 2.6 × 10−5 7.1 × 10−4
Np-239 7.0 1.9 × 102 4.0 × 10−1 1.1 × 101 8.6 × 103 2.3 × 105
Os-185 Osmium (76) 1.0 2.7 × 101 1.0 2.7 × 101 2.8 × 102 7.5 × 103
Os-191 1.0 × 101 2.7 × 102 2.0 5.4 × 101 1.6 × 103 4.4 × 104
Os-191m 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 4.6 × 104 1.3 × 106
Os-193 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.0 × 104 5.3 × 105
Os-194 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.1 × 101 3.1 × 102
P-32 Phosphorus (15) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.1 × 104 2.9 × 105
P-33 4.0 × 101 1.1 × 103 1.0 2.7 × 101 5.8 × 103 1.6 × 105
Pa-230 (a) Protactinium (91) 2.0 5.4 × 101 7.0 × 10−2 1.9 1.2 × 103 3.3 × 104
Pa-231 4.0 1.1 × 102 4.0 × 10−4 1.1 × 10−2 1.7 × 10−3 4.7 × 10−2
Pa-233 5.0 1.4 × 102 7.0 × 10−1 1.9 × 101 7.7 × 102 2.1 × 104
Pb-201 Lead (82) 1.0 2.7 × 101 1.0 2.7 × 101 6.2 × 104 1.7 × 106
Pb-202 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 1.2 × 10−4 3.4 × 10−3
Pb-203 4.0 1.1 × 102 3.0 8.1 × 101 1.1 × 104 3.0 × 105
Pb-205 Unlimited Unlimited Unlimited Unlimited 4.5 × 10−6 1.2 × 10−4
Pb-210 (a) 1.0 2.7 × 101 5.0 × 10−2 1.4 2.8 7.6 × 101
Pb-212 (a) 7.0 × 10−1 1.9 × 101 2.0 × 10−1 5.4 5.1 × 104 1.4 × 106
Pd-103 (a) Palladium (46) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 2.8 × 103 7.5 × 104
Pd-107 Unlimited Unlimited Unlimited Unlimited 1.9 × 10−5 5.1 × 10−4
Pd-109 2.0 5.4 × 101 5.0 × 10−1 1.4 × 101 7.9 × 104 2.1 × 106
Pm-143 Promethium (61) 3.0 8.1 × 101 3.0 8.1 × 101 1.3 × 102 3.4 × 103
Pm-144 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 9.2 × 101 2.5 × 103
Pm-145 3.0 × 101 8.1 × 102 1.0 × 101 2.7 × 102 5.2 1.4 × 102
Pm-147 4.0 × 101 1.1 × 103 2.0 5.4 × 101 3.4 × 101 9.3 × 102
Pm-148m (a) 8.0 × 10−1 2.2 × 101 7.0 × 10−1 1.9 × 101 7.9 × 102 2.1 × 104
Pm-149 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 1.5 × 104 4.0 × 105
Pm-151 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.7 × 104 7.3 × 105
Po-210 Polonium (84) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 1.7 × 102 4.5 × 103
Pr-142 Praseodymium (59) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.3 × 104 1.2 × 106
Pr-143 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.5 × 103 6.7 × 104
Pt-188 (a) Platinum (78) 1.0 2.7 × 101 8.0 × 10−1 2.2 × 101 2.5 × 103 6.8 × 104
Pt-191 4.0 1.1 × 102 3.0 8.1 × 101 8.7 × 103 2.4 × 105
Pt-193 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 1.4 3.7 × 101
Pt-193m 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 5.8 × 103 1.6 × 105
Pt-195m 1.0 × 101 2.7 × 102 5.0 × 10−1 1.4 × 101 6.2 × 103 1.7 × 105
Pt-197 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 3.2 × 104 8.7 × 105
Pt-197m 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 3.7 × 105 1.0 × 107
Pu-236 Plutonium (94) 3.0 × 101 8.1 × 102 3.0 × 10−3 8.1 × 10−2 2.0 × 101 5.3 × 102
Pu-237 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 4.5 × 102 1.2 × 104
Pu-238 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 6.3 × 10−1 1.7 × 101
Pu-239 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 2.3 × 10−3 6.2 × 10−2
Pu-240 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 8.4 × 10−3 2.3 × 10−1
Pu-241 (a) 4.0 × 101 1.1 × 103 6.0 × 10−2 1.6 3.8 1.0 × 102
Pu-242 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 1.5 × 10−4 3.9 × 10−3
Pu-244 (a) 4.0 × 10−1 1.1 × 101 1.0 × 10−3 2.7 × 10−2 6.7 × 10−7 1.8 × 10−5
Ra-223 (a) Radium (88) 4.0 × 10−1 1.1 × 101 7.0 × 10−3 1.9 × 10−1 1.9 × 103 5.1 × 104
Ra-224 (a) 4.0 × 10−1 1.1 × 101 2.0 × 10−2 5.4 × 10−1 5.9 × 103 1.6 × 105
Ra-225 (a) 2.0 × 10−1 5.4 4.0 × 10−3 1.1 × 10−1 1.5 × 103 3.9 × 104
Ra-226 (a) 2.0 × 10−1 5.4 3.0 × 10−3 8.1 × 10−2 3.7 × 10−2 1.0
Ra-228 (a) 6.0 × 10−1 1.6 × 101 2.0 × 10−2 5.4 × 10−1 1.0 × 101 2.7 × 102
Rb-81 Rubidium (37) 2.0 5.4 × 101 8.0 × 10−1 2.2 × 101 3.1 × 105 8.4 × 106
Rb-83 (a) 2.0 5.4 × 101 2.0 5.4 × 101 6.8 × 102 1.8 × 104
Rb-84 1.0 2.7 × 101 1.0 2.7 × 101 1.8 × 103 4.7 × 104
Rb-86 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 3.0 × 103 8.1 × 104
Rb-87 Unlimited Unlimited Unlimited Unlimited 3.2 × 10−9 8.6 × 10−8
Rb(nat) Unlimited Unlimited Unlimited Unlimited 6.7 × 10 −10 1.8 × 10 −8
Re-184 Rhenium (75) 1.0 2.7 × 101 1.0 2.7 × 101 6.9 × 102 1.9 × 104
Re-184m 3.0 8.1 × 101 1.0 2.7 × 101 1.6 × 102 4.3 × 103
Re-186 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 6.9 × 103 1.9 × 105
Re-187 Unlimited Unlimited Unlimited Unlimited 1.4 × 10−9 3.8 × 10−8
Re-188 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.6 × 104 9.8 × 105
Re-189 (a) 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.5 × 104 6.8 × 105
Re(nat) Unlimited Unlimited Unlimited Unlimited 0.0 2.4 × 10−8
Rh-99 Rhodium (45) 2.0 5.4 × 101 2.0 5.4 × 101 3.0 × 103 8.2 × 104
Rh-101 4.0 1.1 × 102 3.0 8.1 × 101 4.1 × 101 1.1 × 103
Rh-102 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 4.5 × 101 1.2 × 103
Rh-102m 2.0 5.4 × 101 2.0 5.4 × 101 2.3 × 102 6.2 × 103
Rh-103m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 1.2 × 106 3.3 × 107
Rh-105 1.0 × 101 2.7 × 102 8.0 × 10−1 2.2 × 101 3.1 × 104 8.4 × 105
Rn-222 (a) Radon (86) 3.0 × 10−1 8.1 4.0 × 10−3 1.1 × 10−1 5.7 × 103 1.5 × 105
Ru-97 Ruthenium (44) 5.0 1.4 × 102 5.0 1.4 × 102 1.7 × 104 4.6 × 105
Ru-103 (a) 2.0 5.4 × 101 2.0 5.4 × 101 1.2 × 103 3.2 × 104
Ru-105 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 2.5 × 105 6.7 × 106
Ru-106 (a) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.2 × 102 3.3 × 103
S-35 Sulphur (16) 4.0 × 101 1.1 × 103 3.0 8.1 × 101 1.6 × 103 4.3 × 104
Sb-122 Antimony (51) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.5 × 104 4.0 × 105
Sb-124 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 6.5 × 102 1.7 × 104
Sb-125 2.0 5.4 × 101 1.0 2.7 × 101 3.9 × 101 1.0 × 103
Sb-126 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.1 × 103 8.4 × 104
Sc-44 Scandium (21) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.7 × 105 1.8 × 107
Sc-46 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.3 × 103 3.4 × 104
Sc-47 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 3.1 × 104 8.3 × 105
Sc-48 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.5 × 104 1.5 × 106
Se-75 Selenium (34) 3.0 8.1 × 101 3.0 8.1 × 101 5.4 × 102 1.5 × 104
Se-79 4.0 × 101 1.1 × 103 2.0 5.4 × 101 2.6 × 10−3 7.0 × 10−2
Si-31 Silicon (14) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.4 × 106 3.9 × 107
Si-32 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 3.9 1.1 × 102
Sm-145 Samarium (62) 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 9.8 × 101 2.6 × 103
Sm-147 Unlimited Unlimited Unlimited Unlimited 8.5 × 10−10 2.3 × 10−8
Sm-151 4.0 × 101 1.1 × 103 1.0 × 101 2.7 × 102 9.7 × 10−1 2.6 × 101
Sm-153 9.0 2.4 × 102 6.0 × 10−1 1.6 × 101 1.6 × 104 4.4 × 105
Sn-113 (a) Tin (50) 4.0 1.1 × 102 2.0 5.4 × 101 3.7 × 102 1.0 × 104
Sn-117m 7.0 1.9 × 102 4.0 × 10−1 1.1 × 101 3.0 × 103 8.2 × 104
Sn-119m 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 1.4 × 102 3.7 × 103
Sn-121m (a) 4.0 × 101 1.1 × 103 9.0 × 10−1 2.4 × 101 2.0 5.4 × 101
Sn-123 8.0 × 10−1 2.2 × 101 6.0 × 10−1 1.6 × 101 3.0 × 102 8.2 × 103
Sn-125 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.0 × 103 1.1 × 105
Sn-126 (a) 6.0 × 10−1 1.6 × 101 4.0 × 10−1 1.1 × 101 1.0 × 10−3 2.8 × 10−2
Sr-82 (a) Strontium (38) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 2.3 × 103 6.2 × 104
Sr-85 2.0 5.4 × 101 2.0 5.4 × 101 8.8 × 102 2.4 × 104
Sr-85m 5.0 1.4 × 102 5.0 1.4 × 102 1.2 × 106 3.3 × 107
Sr-87m 3.0 8.1 × 101 3.0 8.1 × 101 4.8 × 105 1.3 × 107
Sr-89 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.1 × 103 2.9 × 104
Sr-90 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.1 1.4 × 102
Sr-91 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.3 × 105 3.6 × 106
Sr-92 (a) 1.0 2.7 × 101 3.0 × 10−1 8.1 4.7 × 105 1.3 × 107
T(H-3) Tritium (1) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.6 × 102 9.7 × 103
Ta-178 (long-lived) Tantalum (73) 1.0 2.7 × 101 8.0 × 10−1 2.2 × 101 4.2 × 106 1.1 × 108
Ta-179 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 4.1 × 101 1.1 × 103
Ta-182 9.0 × 10−1 2.4 × 101 5.0 × 10−1 1.4 × 101 2.3 × 102 6.2 × 103
Tb-157 Terbium (65) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.6 × 10−1 1.5 × 101
Tb-158 1.0 2.7 × 101 1.0 2.7 × 101 5.6 × 10−1 1.5 × 101
Tb-160 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 4.2 × 102 1.1 × 104
Tc-95m (a) Technetium (43) 2.0 5.4 × 101 2.0 5.4 × 101 8.3 × 102 2.2 × 104
Tc-96 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.2 × 104 3.2 × 105
Tc-96m (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.4 × 106 3.8 × 107
Tc-97 Unlimited Unlimited Unlimited Unlimited 5.2 × 10−5 1.4 × 10−3
Tc-97m 4.0 × 101 1.1 × 103 1.0 2.7 × 101 5.6 × 102 1.5 × 104
Tc-98 8.0 × 10−1 2.2 × 101 7.0 × 10−1 1.9 × 101 3.2 × 10−5 8.7 × 10−4
Tc-99 4.0 × 101 1.1 × 103 9.0 × 10−1 2.4 × 101 6.3 × 10−4 1.7 × 10−2
Tc-99m 1.0 × 101 2.7 × 102 4.0 1.1 × 102 1.9 × 105 5.3 × 106
Te-121 Tellurium (52) 2.0 5.4 × 101 2.0 5.4 × 101 2.4 × 103 6.4 × 104
Te-121m 5.0 1.4 × 102 3.0 8.1 × 101 2.6 × 102 7.0 × 103
Te-123m 8.0 2.2 × 102 1.0 2.7 × 101 3.3 × 102 8.9 × 103
Te-125m 2.0 × 101 5.4 × 102 9.0 × 10−1 2.4 × 101 6.7 × 102 1.8 × 104
Te-127 2.0 × 101 5.4 × 102 7.0 × 10−1 1.9 × 101 9.8 × 104 2.6 × 106
Te-127m (a) 2.0 × 101 5.4 × 102 5.0 × 10−1 1.4 × 101 3.5 × 102 9.4 × 103
Te-129 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 7.7 × 105 2.1 × 107
Te-129m (a) 8.0 × 10−1 2.2 × 101 4.0 × 10−1 1.1 × 101 1.1 × 103 3.0 × 104
Te-131m (a) 7.0 × 10−1 1.9 × 101 5.0 × 10−1 1.4 × 101 3.0 × 104 8.0 × 105
Te-132 (a) 5.0 × 10−1 1.4 × 101 4.0 × 10−1 1.1 × 101 1.1 × 104 3.0 × 105
Th-227 Thorium (90) 1.0 × 101 2.7 × 102 5.0 × 10−3 1.4 × 10−1 1.1 × 103 3.1 × 104
Th-228 (a) 5.0 × 10−1 1.4 × 101 1.0 × 10−3 2.7 × 10−2 3.0 × 101 8.2 × 102
Th-229 5.0 1.4 × 102 5.0 × 10−4 1.4 × 10−2 7.9 × 10−3 2.1 × 10−1
Th-230 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 7.6 × 10−4 2.1 × 10−2
Th-231 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.0 × 104 5.3 × 105
Th-232 Unlimited Unlimited Unlimited Unlimited 4.0 × 10−9 1.1 × 10−7
Th-234 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 8.6 × 102 2.3 × 104
Th(nat) Unlimited Unlimited Unlimited Unlimited 8.1 × 10−9 2.2 × 10−7
Ti-44 (a) Titanium (22) 5.0 × 10−1 1.4 × 101 4.0 × 10−1 1.1 × 101 6.4 1.7 × 102
Tl-200 Thallium (81) 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 2.2 × 104 6.0 × 105
Tl-201 1.0 × 101 2.7 × 102 4.0 1.1 × 102 7.9 × 103 2.1 × 105
Tl-202 2.0 5.4 × 101 2.0 5.4 × 101 2.0 × 103 5.3 × 104
Tl-204 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 1.7 × 101 4.6 × 102
Tm-167 Thulium (69) 7.0 1.9 × 102 8.0 × 10−1 2.2 × 101 3.1 × 103 8.5 × 104
Tm-170 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.2 × 102 6.0 × 103
Tm-171 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103
U-230 (fast lung absorption) (a)(d) Uranium (92) 4.0 × 101 1.1 × 103 1.0 × 10−1 2.7 1.0 × 103 2.7 × 104
U-230 (medium lung absorption) (a)(e) 4.0 × 101 1.1 × 103 4.0 × 10−3 1.1 × 10−1 1.0 × 103 2.7 × 104
U-230 (slow lung absorption) (a)(f) 3.0 × 101 8.1 × 102 3.0 × 10−3 8.1 × 10−2 1.0 × 103 2.7 × 104
U-232 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 1.0 × 10−2 2.7 × 10−1 8.3 × 10−1 2.2 × 101
U-232 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 7.0 × 10−3 1.9 × 10−1 8.3 × 10−1 2.2 × 101
U-232 (slow lung absorption) (f) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 8.3 × 10−1 2.2 × 101
U-233 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 9.0 × 10−2 2.4 3.6 × 10−4 9.7 × 10−3
U-233 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 3.6 × 10−4 9.7 × 10−3
U-233 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 3.6 × 10−4 9.7 × 10−3
U-234 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 9.0 × 10−2 2.4 2.3 × 10−4 6.2 × 10−3
U-234 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.3 × 10−4 6.2 × 10−3
U-234 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 2.3 × 10−4 6.2 × 10−3
U-235 (all lung absorption types) (a),(d),(e),(f) Unlimited Unlimited Unlimited Unlimited 8.0 × 10−8 2.2 × 10−6
U-236 (fast lung absorption) (d) Unlimited Unlimited Unlimited Unlimited 2.4 × 10−6 6.5 × 10−5
U-236 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.4 × 10−6 6.5 × 10−5
U-236 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 2.4 × 10−6 6.5 × 10−5
U-238 (all lung absorption types) (d),(e),(f) Unlimited Unlimited Unlimited Unlimited 1.2 × 10−8 3.4 × 10−7
U (nat) Unlimited Unlimited Unlimited Unlimited 2.6 × 10−8 7.1 × 10−7
U (enriched to 20% or less)(g) Unlimited Unlimited Unlimited Unlimited see § 173.434 see § 173.434
U (dep) Unlimited Unlimited Unlimited Unlimited see § 173.434 see § 173.434
V-48 Vanadium (23) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 6.3 × 103 1.7 × 105
V-49 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.0 × 102 8.1 × 103
W-178 (a) Tungsten (74) 9.0 2.4 × 102 5.0 1.4 × 102 1.3 × 103 3.4 × 104
W-181 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 2.2 × 102 6.0 × 103
W-185 4.0 × 101 1.1 × 103 8.0 × 10−1 2.2 × 101 3.5 × 102 9.4 × 103
W-187 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.6 × 104 7.0 × 105
W-188 (a) 4.0 × 10−1 1.1 × 101 3.0 × 10−1 8.1 3.7 × 102 1.0 × 104
Xe-122 (a) Xenon (54) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.8 × 104 1.3 × 106
Xe-123 2.0 5.4 × 101 7.0 × 10−1 1.9 × 101 4.4 × 105 1.2 × 107
Xe-127 4.0 1.1 × 102 2.0 5.4 × 101 1.0 × 103 2.8 × 104
Xe-131m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.1 × 103 8.4 × 104
Xe-133 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 6.9 × 103 1.9 × 105
Xe-135 3.0 8.1 × 101 2.0 5.4 × 101 9.5 × 104 2.6 × 106
Y-87 (a) Yttrium (39) 1.0 2.7 × 101 1.0 2.7 × 101 1.7 × 104 4.5 × 105
Y-88 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 5.2 × 102 1.4 × 104
Y-90 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.0 × 104 5.4 × 105
Y-91 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 9.1 × 102 2.5 × 104
Y-91m 2.0 5.4 × 101 2.0 5.4 × 101 1.5 × 106 4.2 × 107
Y-92 2.0 × 10−1 5.4 2.0 × 10−1 5.4 3.6 × 105 9.6 × 106
Y-93 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.2 × 105 3.3 × 106
Yb-169 Ytterbium (70) 4.0 1.1 × 102 1.0 2.7 × 101 8.9 × 102 2.4 × 104
Yb-175 3.0 × 101 8.1 × 102 9.0 × 10−1 2.4 × 101 6.6 × 103 1.8 × 105
Zn-65 Zinc (30) 2.0 5.4 × 101 2.0 5.4 × 101 3.0 × 102 8.2 × 103
Zn-69 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 1.8 × 106 4.9 × 107
Zn-69m (a) 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 1.2 × 105 3.3 × 106
Zr-88 Zirconium (40) 3.0 8.1 × 101 3.0 8.1 × 101 6.6 × 102 1.8 × 104
Zr-93 Unlimited Unlimited Unlimited Unlimited 9.3 × 10−5 2.5 × 10−3
Zr-95 (a) 2.0 5.4 × 101 8.0 × 10−1 2.2 × 101 7.9 × 102 2.1 × 104
Zr-97 (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 7.1 × 104 1.9 × 106
a A1 and/or A2 values for these parent radionuclides include contributions from daughter nuclides with half-lives less than 10 days as listed in footnote (a) to Table 2 in the “IAEA Regulations for the Safe Transport of Radioactive Material, SSR-6” (IBR, see § 171.7 of this subchapter).
b The values of A1 and A2 in curies (Ci) are approximate and for information only; the regulatory standard units are Terabecquerels (TBq), (see § 171.10).
c The activity of Ir-192 in special form may be determined from a measurement of the rate of decay or a measurement of the radiation level at a prescribed distance from the source.
d These values apply only to compounds of uranium that take the chemical form of UF6, UO2 F2 and UO2 (NO3)2 in both normal and accident conditions of transport.
e These values apply only to compounds of uranium that take the chemical form of UO3, UF4, UCl4 and hexavalent compounds in both normal and accident conditions of transport.
f These values apply to all compounds of uranium other than those specified in notes (d) and (e) of this table.
g These values apply to unirradiated uranium only.
h [Reserved]
i A2 = 0.74 TBq (20 Ci) for Mo-99 for domestic use.

Where this section sits in the code

Title 49—Transportation
Subtitle B—Other Regulations Relating to Transportation
CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS
PART 173—SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS
Subpart I—Class 7 (Radioactive) Materials

The table of A1 and A2 values for radionuclides is as follows:

Symbol of radionuclide Element and atomic number A1 (TBq) A1 (Ci) b A2 (TBq) A2 (Ci) b Specific activity

(TBq/g) (Ci/g)

Ac-225 (a) Actinium (89) 8.0 × 10−1 2.2 × 101 6.0 × 10−3 1.6 × 10−1 2.1 × 103 5.8 × 104

Ac-227 (a) 9.0 × 10−1 2.4 × 101 9.0 × 10−5 2.4 × 10−3 2.7 7.2 × 101

Ac-228 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 8.4 × 104 2.2 × 106

Ag-105 Silver (47) 2.0 5.4 × 101 2.0 5.4 × 101 1.1 × 103 3.0 × 104

Ag-108m (a) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 9.7 × 10−1 2.6 × 101

Ag-110m (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.8 × 102 4.7 × 103

Ag-111 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 5.8 × 103 1.6 × 105

Al-26 Aluminum (13) 1.0 × 10−1 2.7 1.0 × 10−1 2.7 7.0 × 10−4 1.9 × 10−2

Am-241 Americium (95) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 1.3 × 10−1 3.4

Am-242m (a) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 3.6 × 10−1 1.0 × 101

Am-243 (a) 5.0 1.4 × 102 1.0 × 10−3 2.7 × 10−2 7.4 × 10−3 2.0 × 10−1

Ar-37 Argon (18) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.7 × 103 9.9 × 104

Ar-39 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 1.3 3.4 × 101

Ar-41 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.5 × 106 4.2 × 107

As-72 Arsenic (33) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 6.2 × 104 1.7 × 106

As-73 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 8.2 × 102 2.2 × 104

As-74 1.0 2.7 × 101 9.0 × 10−1 2.4 × 101 3.7 × 103 9.9 × 104

As-76 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.8 × 104 1.6 × 106

As-77 2.0 × 101 5.4 × 102 7.0 × 10−1 1.9 × 101 3.9 × 104 1.0 × 106

At-211 (a) Astatine (85) 2.0 × 101 5.4 × 102 5.0 × 10−1 1.4 × 101 7.6 × 104 2.1 × 106

Au-193 Gold (79) 7.0 1.9 × 102 2.0 5.4 × 101 3.4 × 104 9.2 × 105

Au-194 1.0 2.7 × 101 1.0 2.7 × 101 1.5 × 104 4.1 × 105

Au-195 1.0 × 101 2.7 × 102 6.0 1.6 × 102 1.4 × 102 3.7 × 103

Au-198 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 9.0 × 103 2.4 × 105

Au-199 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 7.7 × 103 2.1 × 105

Ba-131 (a) Barium (56) 2.0 5.4 × 101 2.0 5.4 × 101 3.1 × 103 8.4 × 104

Ba-133 3.0 8.1 × 101 3.0 8.1 × 101 9.4 2.6 × 102

Ba-133m 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 2.2 × 104 6.1 × 105

Ba-140 (a) 5.0 × 10−1 1.4 × 101 3.0 × 10−1 8.1 2.7 × 103 7.3 × 104

Be-7 Beryllium (4) 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 1.3 × 104 3.5 × 105

Be-10 4.0 × 101 1.1 × 103 6.0 × 10−1 1.6 × 101 8.3 × 10−4 2.2 × 10−2

Bi-205 Bismuth (83) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 1.5 × 103 4.2 × 104

Bi-206 3.0 × 10−1 8.1 3.0 × 10−1 8.1 3.8 × 103 1.0 × 105

Bi-207 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 1.9 5.2 × 101

Bi-210 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 4.6 × 103 1.2 × 105

Bi-210m (a) 6.0 × 10−1 1.6 × 101 2.0 × 10−2 5.4 × 10−1 2.1 × 10−5 5.7 × 10−4

Bi-212 (a) 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 5.4 × 105 1.5 × 107

Bk-247 Berkelium (97) 8.0 2.2 × 102 8.0 × 10−4 2.2 × 10−2 3.8 × 10−2 1.0

Bk-249 (a) 4.0 × 101 1.1 × 103 3.0 × 10−1 8.1 6.1 × 101 1.6 × 103

Br-76 Bromine (35) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 9.4 × 104 2.5 × 106

Br-77 3.0 8.1 × 101 3.0 8.1 × 101 2.6 × 104 7.1 × 105

Br-82 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.0 × 104 1.1 × 106

C-11 Carbon (6) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.1 × 107 8.4 × 108

C-14 4.0 × 101 1.1 × 103 3.0 8.1 × 101 1.6 × 10−1 4.5

Ca-41 Calcium (20) Unlimited Unlimited Unlimited Unlimited 3.1 × 10−3 8.5 × 10−2

Ca-45 4.0 × 101 1.1 × 103 1.0 2.7 × 101 6.6 × 102 1.8 × 104

Ca-47 (a) 3.0 8.1 × 101 3.0 × 10−1 8.1 2.3 × 104 6.1 × 105

Cd-109 Cadmium (48) 3.0 × 101 8.1 × 102 2.0 5.4 × 101 9.6 × 101 2.6 × 103

Cd-113m 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 8.3 2.2 × 102

Cd-115 (a) 3.0 8.1 × 101 4.0 × 10−1 1.1 × 101 1.9 × 104 5.1 × 105

Cd-115m 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 9.4 × 102 2.5 × 104

Ce-139 Cerium (58) 7.0 1.9 × 102 2.0 5.4 × 101 2.5 × 102 6.8 × 103

Ce-141 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 1.1 × 103 2.8 × 104

Ce-143 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 2.5 × 104 6.6 × 105

Ce-144 (a) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.2 × 102 3.2 × 103

Cf-248 Californium (98) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 5.8 × 101 1.6 × 103

Cf-249 3.0 8.1 × 101 8.0 × 10−4 2.2 × 10−2 1.5 × 10−1 4.1

Cf-250 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 4.0 1.1 × 102

Cf-251 7.0 1.9 × 102 7.0 × 10−4 1.9 × 10−2 5.9 × 10−2 1.6

Cf-252 1 × 10−1 2.7 3.0 × 10−3 8.1 × 10−2 2.0 × 10 1 5.4 × 10 2

Cf-253 (a) 4.0 × 101 1.1 × 103 4.0 × 10−2 1.1 1.1 × 103 2.9 × 104

Cf-254 1.0 × 10−3 2.7 × 10−2 1.0 × 10−3 2.7 × 10−2 3.1 × 102 8.5 × 103

Cl-36 Chlorine (17) 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 1.2 × 10−3 3.3 × 10−2

Cl-38 2.0 × 10−1 5.4 2.0 × 10−1 5.4 4.9 × 106 1.3 × 108

Cm-240 Curium (96) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 7.5 × 102 2.0 × 104

Cm-241 2.0 5.4 × 101 1.0 2.7 × 101 6.1 × 102 1.7 × 104

Cm-242 4.0 × 101 1.1 × 103 1.0 × 10−2 2.7 × 10−1 1.2 × 102 3.3 × 103

Cm-243 9.0 2.4 × 102 1.0 × 10−3 2.7 × 10−2 1.9 5.2 × 101

Cm-244 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 3.0 8.1 × 101

Cm-245 9.0 2.4 × 102 9.0 × 10−4 2.4 × 10−2 6.4 × 10−3 1.7 × 10−1

Cm-246 9.0 2.4 × 102 9.0 × 10−4 2.4 × 10−2 1.1 × 10−2 3.1 × 10−1

Cm-247 (a) 3.0 8.1 × 101 1.0 × 10−3 2.7 × 10−2 3.4 × 10−6 9.3 × 10−5

Cm-248 2.0 × 10−2 5.4 × 10−1 3.0 × 10−4 8.1 × 10−3 1.6 × 10−4 4.2 × 10−3

Co-55 Cobalt (27) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.1 × 105 3.1 × 106

Co-56 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.1 × 103 3.0 × 104

Co-57 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 3.1 × 102 8.4 × 103

Co-58 1.0 2.7 × 101 1.0 2.7 × 101 1.2 × 103 3.2 × 104

Co-58m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 2.2 × 105 5.9 × 106

Co-60 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.2 × 101 1.1 × 103

Cr-51 Chromium (24) 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 3.4 × 103 9.2 × 104

Cs-129 Cesium (55) 4.0 1.1 × 102 4.0 1.1 × 102 2.8 × 104 7.6 × 105

Cs-131 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 3.8 × 103 1.0 × 105

Cs-132 1.0 2.7 × 101 1.0 2.7 × 101 5.7 × 103 1.5 × 105

Cs-134 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 4.8 × 101 1.3 × 103

Cs-134m 4.0 × 101 1.1 × 103 6.0 × 10−1 1.6 × 101 3.0 × 105 8.0 × 106

Cs-135 4.0 × 101 1.1 × 103 1.0 2.7 × 101 4.3 × 10−5 1.2 × 10−3

Cs-136 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.7 × 103 7.3 × 104

Cs-137 (a) 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 3.2 8.7 × 101

Cu-64 Copper (29) 6.0 1.6 × 102 1.0 2.7 × 101 1.4 × 105 3.9 × 106

Cu-67 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 2.8 × 104 7.6 × 105

Dy-159 Dysprosium (66) 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 2.1 × 102 5.7 × 103

Dy-165 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 3.0 × 105 8.2 × 106

Dy-166 (a) 9.0 × 10−1 2.4 × 101 3.0 × 10−1 8.1 8.6 × 103 2.3 × 105

Er-169 Erbium (68) 4.0 × 101 1.1 × 103 1.0 2.7 × 101 3.1 × 103 8.3 × 104

Er-171 8.0 × 10−1 2.2 × 101 5.0 × 10−1 1.4 × 101 9.0 × 104 2.4 × 106

Eu-147 Europium (63) 2.0 5.4 × 101 2.0 5.4 × 101 1.4 × 103 3.7 × 104

Eu-148 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.0 × 102 1.6 × 104

Eu-149 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 3.5 × 102 9.4 × 103

Eu-150 (short lived) 2.0 5.4 × 101 7.0 × 10−1 1.9 × 101 6.1 × 104 1.6 × 106

Eu-150 (long lived) 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 6.1 × 104 1.6 × 106

Eu-152 1.0 2.7 × 101 1.0 2.7 × 101 6.5 1.8 × 102

Eu-152m 8.0 × 10−1 2.2 × 101 8.0 × 10−1 2.2 × 101 8.2 × 104 2.2 × 106

Eu-154 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 9.8 2.6 × 102

Eu-155 2.0 × 101 5.4 × 102 3.0 8.1 × 101 1.8 × 101 4.9 × 102

Eu-156 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 2.0 × 103 5.5 × 104

F-18 Fluorine (9) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.5 × 106 9.5 × 107

Fe-52 (a) Iron (26) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.7 × 105 7.3 × 106

Fe-55 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 8.8 × 101 2.4 × 103

Fe-59 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 1.8 × 103 5.0 × 104

Fe-60 (a) 4.0 × 101 1.1 × 103 2.0 × 10−1 5.4 7.4 × 10−4 2.0 × 10−2

Ga-67 Gallium (31) 7.0 1.9 × 102 3.0 8.1 × 101 2.2 × 104 6.0 × 105

Ga-68 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.5 × 106 4.1 × 107

Ga-72 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.1 × 105 3.1 × 106

Gd-146 (a) Gadolinium (64) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.9 × 102 1.9 × 104

Gd-148 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 1.2 3.2 × 101

Gd-153 1.0 × 101 2.7 × 102 9.0 2.4 × 102 1.3 × 102 3.5 × 103

Gd-159 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 3.9 × 104 1.1 × 106

Ge-68 (a) Germanium (32) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.6 × 102 7.1 × 103

Ge-71 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.8 × 103 1.6 × 105

Ge-77 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.3 × 105 3.6 × 106

Hf-172 (a) Hafnium (72) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 4.1 × 101 1.1 × 103

Hf-175 3.0 8.1 × 101 3.0 8.1 × 101 3.9 × 102 1.1 × 104

Hf-181 2.0 5.4 × 101 5.0 × 10−1 1.4 × 101 6.3 × 102 1.7 × 104

Hf-182 Unlimited Unlimited Unlimited Unlimited 8.1 × 10−6 2.2 × 10−4

Hg-194 (a) Mercury (80) 1.0 2.7 × 101 1.0 2.7 × 101 1.3 × 10−1 3.5

Hg-195m (a) 3.0 8.1 × 101 7.0 × 10−1 1.9 × 101 1.5 × 104 4.0 × 105

Hg-197 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 9.2 × 103 2.5 × 105

Hg-197m 1.0 × 101 2.7 × 102 4.0 × 10−1 1.1 × 101 2.5 × 104 6.7 × 105

Hg-203 5.0 1.4 × 102 1.0 2.7 × 101 5.1 × 102 1.4 × 104

Ho-166 Holmium (67) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 2.6 × 104 7.0 × 105

Ho-166m 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 6.6 × 10−2 1.8

I-123 Iodine (53) 6.0 1.6 × 102 3.0 8.1 × 101 7.1 × 104 1.9 × 106

I-124 1.0 2.7 × 101 1.0 2.7 × 101 9.3 × 103 2.5 × 105

I-125 2.0 × 101 5.4 × 102 3.0 8.1 × 101 6.4 × 102 1.7 × 104

I-126 2.0 5.4 × 101 1.0 2.7 × 101 2.9 × 103 8.0 × 104

I-129 Unlimited Unlimited Unlimited Unlimited 6.5 × 10−6 1.8 × 10−4

I-131 3.0 8.1 × 101 7.0 × 10−1 1.9 × 101 4.6 × 103 1.2 × 105

I-132 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.8 × 105 1.0 × 107

I-133 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 4.2 × 104 1.1 × 106

I-134 3.0 × 10−1 8.1 3.0 × 10−1 8.1 9.9 × 105 2.7 × 107

I-135 (a) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.3 × 105 3.5 × 106

In-111 Indium (49) 3.0 8.1 × 101 3.0 8.1 × 101 1.5 × 104 4.2 × 105

In-113m 4.0 1.1 × 102 2.0 5.4 × 101 6.2 × 105 1.7 × 107

In-114m (a) 1.0 × 101 2.7 × 102 5.0 × 10−1 1.4 × 101 8.6 × 102 2.3 × 104

In-115m 7.0 1.9 × 102 1.0 2.7 × 101 2.2 × 105 6.1 × 106

Ir-189 (a) Iridium (77) 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 1.9 × 103 5.2 × 104

Ir-190 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 2.3 × 103 6.2 × 104

Ir-192 (c) 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 3.4 × 102 9.2 × 103

Ir-194 3.0 × 10−1 8.1 3.0 × 10−1 8.1 3.1 × 104 8.4 × 105

K-40 Potassium (19) 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 2.4 × 10−7 6.4 × 10−6

K-42 2.0 × 10−1 5.4 2.0 × 10−1 5.4 2.2 × 105 6.0 × 106

K-43 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 1.2 × 105 3.3 × 106

Kr-79 Krypton (36) 4.0 × 10 0 1.1 × 10 2 2.0 × 10 0 5.4 × 10 1 4.2 × 10 4 1.1 × 10 6

Kr-81 Krypton (36) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 7.8 × 10−4 2.1 × 10−2

Kr-85 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 1.5 × 101 3.9 × 102

Kr-85m 8.0 2.2 × 102 3.0 8.1 × 101 3.0 × 105 8.2 × 106

Kr-87 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.0 × 106 2.8 × 107

La-137 Lanthanum (57) 3.0 × 101 8.1 × 102 6.0 1.6 × 102 1.6 × 10−3 4.4 × 10−2

La-140 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 2.1 × 104 5.6 × 105

Lu-172 Lutetium (71) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 4.2 × 103 1.1 × 105

Lu-173 8.0 2.2 × 102 8.0 2.2 × 102 5.6 × 101 1.5 × 103

Lu-174 9.0 2.4 × 102 9.0 2.4 × 102 2.3 × 101 6.2 × 102

Lu-174m 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 2.0 × 102 5.3 × 103

Lu-177 3.0 × 101 8.1 × 102 7.0 × 10−1 1.9 × 101 4.1 × 103 1.1 × 105

Mg-28 (a) Magnesium (12) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.0 × 105 5.4 × 106

Mn-52 Manganese (25) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.6 × 104 4.4 × 105

Mn-53 Unlimited Unlimited Unlimited Unlimited 6.8 × 10−5 1.8 × 10−3

Mn-54 1.0 2.7 × 101 1.0 2.7 × 101 2.9 × 102 7.7 × 103

Mn-56 3.0 × 10−1 8.1 3.0 × 10−1 8.1 8.0 × 105 2.2 × 107

Mo-93 Molybdenum (42) 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 4.1 × 10−2 1.1

Mo-99(a)(i) 1.0 2.7 × 10 1 6.0 × 10−1 1.6 × 10 1 1.8 × 10 4 4.8 × 10 5

N-13 Nitrogen (7) 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 5.4 × 107 1.5 × 109

Na-22 Sodium (11) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 2.3 × 102 6.3 × 103

Na-24 2.0 × 10−1 5.4 2.0 × 10−1 5.4 3.2 × 105 8.7 × 106

Nb-93m Niobium (41) 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 8.8 2.4 × 102

Nb-94 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 6.9 × 10−3 1.9 × 10−1

Nb-95 1.0 2.7 × 101 1.0 2.7 × 101 1.5 × 103 3.9 × 104

Nb-97 9.0 × 10−1 2.4 × 101 6.0 × 10−1 1.6 × 101 9.9 × 105 2.7 × 107

Nd-147 Neodymium (60) 6.0 1.6 × 102 6.0 × 10−1 1.6 × 101 3.0 × 103 8.1 × 104

Nd-149 6.0 × 10−1 1.6 × 101 5.0 × 10−1 1.4 × 101 4.5 × 105 1.2 × 107

Ni-59 Nickel (28) Unlimited Unlimited Unlimited Unlimited 3.0 × 10−3 8.0 × 10−2

Ni-63 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 2.1 5.7 × 101

Ni-65 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 7.1 × 105 1.9 × 107

Np-235 Neptunium (93) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.2 × 101 1.4 × 103

Np-236 (short-lived) 2.0 × 101 5.4 × 102 2.0 5.4 × 101 4.7 × 10−4 1.3 × 10−2

Np-236 (long-lived) 9.0 × 100 2.4 × 102 2.0 × 10−2 5.4 × 10−1 4.7 × 10−4 1.3 × 10−2

Np-237 2.0 × 101 5.4 × 102 2.0 × 10−3 5.4 × 10−2 2.6 × 10−5 7.1 × 10−4

Np-239 7.0 1.9 × 102 4.0 × 10−1 1.1 × 101 8.6 × 103 2.3 × 105

Os-185 Osmium (76) 1.0 2.7 × 101 1.0 2.7 × 101 2.8 × 102 7.5 × 103

Os-191 1.0 × 101 2.7 × 102 2.0 5.4 × 101 1.6 × 103 4.4 × 104

Os-191m 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 4.6 × 104 1.3 × 106

Os-193 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.0 × 104 5.3 × 105

Os-194 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.1 × 101 3.1 × 102

P-32 Phosphorus (15) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.1 × 104 2.9 × 105

P-33 4.0 × 101 1.1 × 103 1.0 2.7 × 101 5.8 × 103 1.6 × 105

Pa-230 (a) Protactinium (91) 2.0 5.4 × 101 7.0 × 10−2 1.9 1.2 × 103 3.3 × 104

Pa-231 4.0 1.1 × 102 4.0 × 10−4 1.1 × 10−2 1.7 × 10−3 4.7 × 10−2

Pa-233 5.0 1.4 × 102 7.0 × 10−1 1.9 × 101 7.7 × 102 2.1 × 104

Pb-201 Lead (82) 1.0 2.7 × 101 1.0 2.7 × 101 6.2 × 104 1.7 × 106

Pb-202 4.0 × 101 1.1 × 103 2.0 × 101 5.4 × 102 1.2 × 10−4 3.4 × 10−3

Pb-203 4.0 1.1 × 102 3.0 8.1 × 101 1.1 × 104 3.0 × 105

Pb-205 Unlimited Unlimited Unlimited Unlimited 4.5 × 10−6 1.2 × 10−4

Pb-210 (a) 1.0 2.7 × 101 5.0 × 10−2 1.4 2.8 7.6 × 101

Pb-212 (a) 7.0 × 10−1 1.9 × 101 2.0 × 10−1 5.4 5.1 × 104 1.4 × 106

Pd-103 (a) Palladium (46) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 2.8 × 103 7.5 × 104

Pd-107 Unlimited Unlimited Unlimited Unlimited 1.9 × 10−5 5.1 × 10−4

Pd-109 2.0 5.4 × 101 5.0 × 10−1 1.4 × 101 7.9 × 104 2.1 × 106

Pm-143 Promethium (61) 3.0 8.1 × 101 3.0 8.1 × 101 1.3 × 102 3.4 × 103

Pm-144 7.0 × 10−1 1.9 × 101 7.0 × 10−1 1.9 × 101 9.2 × 101 2.5 × 103

Pm-145 3.0 × 101 8.1 × 102 1.0 × 101 2.7 × 102 5.2 1.4 × 102

Pm-147 4.0 × 101 1.1 × 103 2.0 5.4 × 101 3.4 × 101 9.3 × 102

Pm-148m (a) 8.0 × 10−1 2.2 × 101 7.0 × 10−1 1.9 × 101 7.9 × 102 2.1 × 104

Pm-149 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 1.5 × 104 4.0 × 105

Pm-151 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.7 × 104 7.3 × 105

Po-210 Polonium (84) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 1.7 × 102 4.5 × 103

Pr-142 Praseodymium (59) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.3 × 104 1.2 × 106

Pr-143 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.5 × 103 6.7 × 104

Pt-188 (a) Platinum (78) 1.0 2.7 × 101 8.0 × 10−1 2.2 × 101 2.5 × 103 6.8 × 104

Pt-191 4.0 1.1 × 102 3.0 8.1 × 101 8.7 × 103 2.4 × 105

Pt-193 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 1.4 3.7 × 101

Pt-193m 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 5.8 × 103 1.6 × 105

Pt-195m 1.0 × 101 2.7 × 102 5.0 × 10−1 1.4 × 101 6.2 × 103 1.7 × 105

Pt-197 2.0 × 101 5.4 × 102 6.0 × 10−1 1.6 × 101 3.2 × 104 8.7 × 105

Pt-197m 1.0 × 101 2.7 × 102 6.0 × 10−1 1.6 × 101 3.7 × 105 1.0 × 107

Pu-236 Plutonium (94) 3.0 × 101 8.1 × 102 3.0 × 10−3 8.1 × 10−2 2.0 × 101 5.3 × 102

Pu-237 2.0 × 101 5.4 × 102 2.0 × 101 5.4 × 102 4.5 × 102 1.2 × 104

Pu-238 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 6.3 × 10−1 1.7 × 101

Pu-239 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 2.3 × 10−3 6.2 × 10−2

Pu-240 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 8.4 × 10−3 2.3 × 10−1

Pu-241 (a) 4.0 × 101 1.1 × 103 6.0 × 10−2 1.6 3.8 1.0 × 102

Pu-242 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 1.5 × 10−4 3.9 × 10−3

Pu-244 (a) 4.0 × 10−1 1.1 × 101 1.0 × 10−3 2.7 × 10−2 6.7 × 10−7 1.8 × 10−5

Ra-223 (a) Radium (88) 4.0 × 10−1 1.1 × 101 7.0 × 10−3 1.9 × 10−1 1.9 × 103 5.1 × 104

Ra-224 (a) 4.0 × 10−1 1.1 × 101 2.0 × 10−2 5.4 × 10−1 5.9 × 103 1.6 × 105

Ra-225 (a) 2.0 × 10−1 5.4 4.0 × 10−3 1.1 × 10−1 1.5 × 103 3.9 × 104

Ra-226 (a) 2.0 × 10−1 5.4 3.0 × 10−3 8.1 × 10−2 3.7 × 10−2 1.0

Ra-228 (a) 6.0 × 10−1 1.6 × 101 2.0 × 10−2 5.4 × 10−1 1.0 × 101 2.7 × 102

Rb-81 Rubidium (37) 2.0 5.4 × 101 8.0 × 10−1 2.2 × 101 3.1 × 105 8.4 × 106

Rb-83 (a) 2.0 5.4 × 101 2.0 5.4 × 101 6.8 × 102 1.8 × 104

Rb-84 1.0 2.7 × 101 1.0 2.7 × 101 1.8 × 103 4.7 × 104

Rb-86 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 3.0 × 103 8.1 × 104

Rb-87 Unlimited Unlimited Unlimited Unlimited 3.2 × 10−9 8.6 × 10−8

Rb(nat) Unlimited Unlimited Unlimited Unlimited 6.7 × 10 −10 1.8 × 10 −8

Re-184 Rhenium (75) 1.0 2.7 × 101 1.0 2.7 × 101 6.9 × 102 1.9 × 104

Re-184m 3.0 8.1 × 101 1.0 2.7 × 101 1.6 × 102 4.3 × 103

Re-186 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 6.9 × 103 1.9 × 105

Re-187 Unlimited Unlimited Unlimited Unlimited 1.4 × 10−9 3.8 × 10−8

Re-188 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.6 × 104 9.8 × 105

Re-189 (a) 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.5 × 104 6.8 × 105

Re(nat) Unlimited Unlimited Unlimited Unlimited 0.0 2.4 × 10−8

Rh-99 Rhodium (45) 2.0 5.4 × 101 2.0 5.4 × 101 3.0 × 103 8.2 × 104

Rh-101 4.0 1.1 × 102 3.0 8.1 × 101 4.1 × 101 1.1 × 103

Rh-102 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 4.5 × 101 1.2 × 103

Rh-102m 2.0 5.4 × 101 2.0 5.4 × 101 2.3 × 102 6.2 × 103

Rh-103m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 1.2 × 106 3.3 × 107

Rh-105 1.0 × 101 2.7 × 102 8.0 × 10−1 2.2 × 101 3.1 × 104 8.4 × 105

Rn-222 (a) Radon (86) 3.0 × 10−1 8.1 4.0 × 10−3 1.1 × 10−1 5.7 × 103 1.5 × 105

Ru-97 Ruthenium (44) 5.0 1.4 × 102 5.0 1.4 × 102 1.7 × 104 4.6 × 105

Ru-103 (a) 2.0 5.4 × 101 2.0 5.4 × 101 1.2 × 103 3.2 × 104

Ru-105 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 2.5 × 105 6.7 × 106

Ru-106 (a) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 1.2 × 102 3.3 × 103

S-35 Sulphur (16) 4.0 × 101 1.1 × 103 3.0 8.1 × 101 1.6 × 103 4.3 × 104

Sb-122 Antimony (51) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.5 × 104 4.0 × 105

Sb-124 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 6.5 × 102 1.7 × 104

Sb-125 2.0 5.4 × 101 1.0 2.7 × 101 3.9 × 101 1.0 × 103

Sb-126 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 3.1 × 103 8.4 × 104

Sc-44 Scandium (21) 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 6.7 × 105 1.8 × 107

Sc-46 5.0 × 10−1 1.4 × 101 5.0 × 10−1 1.4 × 101 1.3 × 103 3.4 × 104

Sc-47 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 3.1 × 104 8.3 × 105

Sc-48 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.5 × 104 1.5 × 106

Se-75 Selenium (34) 3.0 8.1 × 101 3.0 8.1 × 101 5.4 × 102 1.5 × 104

Se-79 4.0 × 101 1.1 × 103 2.0 5.4 × 101 2.6 × 10−3 7.0 × 10−2

Si-31 Silicon (14) 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.4 × 106 3.9 × 107

Si-32 4.0 × 101 1.1 × 103 5.0 × 10−1 1.4 × 101 3.9 1.1 × 102

Sm-145 Samarium (62) 1.0 × 101 2.7 × 102 1.0 × 101 2.7 × 102 9.8 × 101 2.6 × 103

Sm-147 Unlimited Unlimited Unlimited Unlimited 8.5 × 10−10 2.3 × 10−8

Sm-151 4.0 × 101 1.1 × 103 1.0 × 101 2.7 × 102 9.7 × 10−1 2.6 × 101

Sm-153 9.0 2.4 × 102 6.0 × 10−1 1.6 × 101 1.6 × 104 4.4 × 105

Sn-113 (a) Tin (50) 4.0 1.1 × 102 2.0 5.4 × 101 3.7 × 102 1.0 × 104

Sn-117m 7.0 1.9 × 102 4.0 × 10−1 1.1 × 101 3.0 × 103 8.2 × 104

Sn-119m 4.0 × 101 1.1 × 103 3.0 × 101 8.1 × 102 1.4 × 102 3.7 × 103

Sn-121m (a) 4.0 × 101 1.1 × 103 9.0 × 10−1 2.4 × 101 2.0 5.4 × 101

Sn-123 8.0 × 10−1 2.2 × 101 6.0 × 10−1 1.6 × 101 3.0 × 102 8.2 × 103

Sn-125 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.0 × 103 1.1 × 105

Sn-126 (a) 6.0 × 10−1 1.6 × 101 4.0 × 10−1 1.1 × 101 1.0 × 10−3 2.8 × 10−2

Sr-82 (a) Strontium (38) 2.0 × 10−1 5.4 2.0 × 10−1 5.4 2.3 × 103 6.2 × 104

Sr-85 2.0 5.4 × 101 2.0 5.4 × 101 8.8 × 102 2.4 × 104

Sr-85m 5.0 1.4 × 102 5.0 1.4 × 102 1.2 × 106 3.3 × 107

Sr-87m 3.0 8.1 × 101 3.0 8.1 × 101 4.8 × 105 1.3 × 107

Sr-89 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 1.1 × 103 2.9 × 104

Sr-90 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 5.1 1.4 × 102

Sr-91 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.3 × 105 3.6 × 106

Sr-92 (a) 1.0 2.7 × 101 3.0 × 10−1 8.1 4.7 × 105 1.3 × 107

T(H-3) Tritium (1) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.6 × 102 9.7 × 103

Ta-178 (long-lived) Tantalum (73) 1.0 2.7 × 101 8.0 × 10−1 2.2 × 101 4.2 × 106 1.1 × 108

Ta-179 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 4.1 × 101 1.1 × 103

Ta-182 9.0 × 10−1 2.4 × 101 5.0 × 10−1 1.4 × 101 2.3 × 102 6.2 × 103

Tb-157 Terbium (65) 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 5.6 × 10−1 1.5 × 101

Tb-158 1.0 2.7 × 101 1.0 2.7 × 101 5.6 × 10−1 1.5 × 101

Tb-160 1.0 2.7 × 101 6.0 × 10−1 1.6 × 101 4.2 × 102 1.1 × 104

Tc-95m (a) Technetium (43) 2.0 5.4 × 101 2.0 5.4 × 101 8.3 × 102 2.2 × 104

Tc-96 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.2 × 104 3.2 × 105

Tc-96m (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 1.4 × 106 3.8 × 107

Tc-97 Unlimited Unlimited Unlimited Unlimited 5.2 × 10−5 1.4 × 10−3

Tc-97m 4.0 × 101 1.1 × 103 1.0 2.7 × 101 5.6 × 102 1.5 × 104

Tc-98 8.0 × 10−1 2.2 × 101 7.0 × 10−1 1.9 × 101 3.2 × 10−5 8.7 × 10−4

Tc-99 4.0 × 101 1.1 × 103 9.0 × 10−1 2.4 × 101 6.3 × 10−4 1.7 × 10−2

Tc-99m 1.0 × 101 2.7 × 102 4.0 1.1 × 102 1.9 × 105 5.3 × 106

Te-121 Tellurium (52) 2.0 5.4 × 101 2.0 5.4 × 101 2.4 × 103 6.4 × 104

Te-121m 5.0 1.4 × 102 3.0 8.1 × 101 2.6 × 102 7.0 × 103

Te-123m 8.0 2.2 × 102 1.0 2.7 × 101 3.3 × 102 8.9 × 103

Te-125m 2.0 × 101 5.4 × 102 9.0 × 10−1 2.4 × 101 6.7 × 102 1.8 × 104

Te-127 2.0 × 101 5.4 × 102 7.0 × 10−1 1.9 × 101 9.8 × 104 2.6 × 106

Te-127m (a) 2.0 × 101 5.4 × 102 5.0 × 10−1 1.4 × 101 3.5 × 102 9.4 × 103

Te-129 7.0 × 10−1 1.9 × 101 6.0 × 10−1 1.6 × 101 7.7 × 105 2.1 × 107

Te-129m (a) 8.0 × 10−1 2.2 × 101 4.0 × 10−1 1.1 × 101 1.1 × 103 3.0 × 104

Te-131m (a) 7.0 × 10−1 1.9 × 101 5.0 × 10−1 1.4 × 101 3.0 × 104 8.0 × 105

Te-132 (a) 5.0 × 10−1 1.4 × 101 4.0 × 10−1 1.1 × 101 1.1 × 104 3.0 × 105

Th-227 Thorium (90) 1.0 × 101 2.7 × 102 5.0 × 10−3 1.4 × 10−1 1.1 × 103 3.1 × 104

Th-228 (a) 5.0 × 10−1 1.4 × 101 1.0 × 10−3 2.7 × 10−2 3.0 × 101 8.2 × 102

Th-229 5.0 1.4 × 102 5.0 × 10−4 1.4 × 10−2 7.9 × 10−3 2.1 × 10−1

Th-230 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 7.6 × 10−4 2.1 × 10−2

Th-231 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.0 × 104 5.3 × 105

Th-232 Unlimited Unlimited Unlimited Unlimited 4.0 × 10−9 1.1 × 10−7

Th-234 (a) 3.0 × 10−1 8.1 3.0 × 10−1 8.1 8.6 × 102 2.3 × 104

Th(nat) Unlimited Unlimited Unlimited Unlimited 8.1 × 10−9 2.2 × 10−7

Ti-44 (a) Titanium (22) 5.0 × 10−1 1.4 × 101 4.0 × 10−1 1.1 × 101 6.4 1.7 × 102

Tl-200 Thallium (81) 9.0 × 10−1 2.4 × 101 9.0 × 10−1 2.4 × 101 2.2 × 104 6.0 × 105

Tl-201 1.0 × 101 2.7 × 102 4.0 1.1 × 102 7.9 × 103 2.1 × 105

Tl-202 2.0 5.4 × 101 2.0 5.4 × 101 2.0 × 103 5.3 × 104

Tl-204 1.0 × 101 2.7 × 102 7.0 × 10−1 1.9 × 101 1.7 × 101 4.6 × 102

Tm-167 Thulium (69) 7.0 1.9 × 102 8.0 × 10−1 2.2 × 101 3.1 × 103 8.5 × 104

Tm-170 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 2.2 × 102 6.0 × 103

Tm-171 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103

U-230 (fast lung absorption) (a)(d) Uranium (92) 4.0 × 101 1.1 × 103 1.0 × 10−1 2.7 1.0 × 103 2.7 × 104

U-230 (medium lung absorption) (a)(e) 4.0 × 101 1.1 × 103 4.0 × 10−3 1.1 × 10−1 1.0 × 103 2.7 × 104

U-230 (slow lung absorption) (a)(f) 3.0 × 101 8.1 × 102 3.0 × 10−3 8.1 × 10−2 1.0 × 103 2.7 × 104

U-232 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 1.0 × 10−2 2.7 × 10−1 8.3 × 10−1 2.2 × 101

U-232 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 7.0 × 10−3 1.9 × 10−1 8.3 × 10−1 2.2 × 101

U-232 (slow lung absorption) (f) 1.0 × 101 2.7 × 102 1.0 × 10−3 2.7 × 10−2 8.3 × 10−1 2.2 × 101

U-233 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 9.0 × 10−2 2.4 3.6 × 10−4 9.7 × 10−3

U-233 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 3.6 × 10−4 9.7 × 10−3

U-233 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 3.6 × 10−4 9.7 × 10−3

U-234 (fast lung absorption) (d) 4.0 × 101 1.1 × 103 9.0 × 10−2 2.4 2.3 × 10−4 6.2 × 10−3

U-234 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.3 × 10−4 6.2 × 10−3

U-234 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 2.3 × 10−4 6.2 × 10−3

U-235 (all lung absorption types) (a),(d),(e),(f) Unlimited Unlimited Unlimited Unlimited 8.0 × 10−8 2.2 × 10−6

U-236 (fast lung absorption) (d) Unlimited Unlimited Unlimited Unlimited 2.4 × 10−6 6.5 × 10−5

U-236 (medium lung absorption) (e) 4.0 × 101 1.1 × 103 2.0 × 10−2 5.4 × 10−1 2.4 × 10−6 6.5 × 10−5

U-236 (slow lung absorption) (f) 4.0 × 101 1.1 × 103 6.0 × 10−3 1.6 × 10−1 2.4 × 10−6 6.5 × 10−5

U-238 (all lung absorption types) (d),(e),(f) Unlimited Unlimited Unlimited Unlimited 1.2 × 10−8 3.4 × 10−7

U (nat) Unlimited Unlimited Unlimited Unlimited 2.6 × 10−8 7.1 × 10−7

U (enriched to 20% or less)(g) Unlimited Unlimited Unlimited Unlimited see § 173.434 see § 173.434

U (dep) Unlimited Unlimited Unlimited Unlimited see § 173.434 see § 173.434

V-48 Vanadium (23) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 6.3 × 103 1.7 × 105

V-49 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.0 × 102 8.1 × 103

W-178 (a) Tungsten (74) 9.0 2.4 × 102 5.0 1.4 × 102 1.3 × 103 3.4 × 104

W-181 3.0 × 101 8.1 × 102 3.0 × 101 8.1 × 102 2.2 × 102 6.0 × 103

W-185 4.0 × 101 1.1 × 103 8.0 × 10−1 2.2 × 101 3.5 × 102 9.4 × 103

W-187 2.0 5.4 × 101 6.0 × 10−1 1.6 × 101 2.6 × 104 7.0 × 105

W-188 (a) 4.0 × 10−1 1.1 × 101 3.0 × 10−1 8.1 3.7 × 102 1.0 × 104

Xe-122 (a) Xenon (54) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 4.8 × 104 1.3 × 106

Xe-123 2.0 5.4 × 101 7.0 × 10−1 1.9 × 101 4.4 × 105 1.2 × 107

Xe-127 4.0 1.1 × 102 2.0 5.4 × 101 1.0 × 103 2.8 × 104

Xe-131m 4.0 × 101 1.1 × 103 4.0 × 101 1.1 × 103 3.1 × 103 8.4 × 104

Xe-133 2.0 × 101 5.4 × 102 1.0 × 101 2.7 × 102 6.9 × 103 1.9 × 105

Xe-135 3.0 8.1 × 101 2.0 5.4 × 101 9.5 × 104 2.6 × 106

Y-87 (a) Yttrium (39) 1.0 2.7 × 101 1.0 2.7 × 101 1.7 × 104 4.5 × 105

Y-88 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 5.2 × 102 1.4 × 104

Y-90 3.0 × 10−1 8.1 3.0 × 10−1 8.1 2.0 × 104 5.4 × 105

Y-91 6.0 × 10−1 1.6 × 101 6.0 × 10−1 1.6 × 101 9.1 × 102 2.5 × 104

Y-91m 2.0 5.4 × 101 2.0 5.4 × 101 1.5 × 106 4.2 × 107

Y-92 2.0 × 10−1 5.4 2.0 × 10−1 5.4 3.6 × 105 9.6 × 106

Y-93 3.0 × 10−1 8.1 3.0 × 10−1 8.1 1.2 × 105 3.3 × 106

Yb-169 Ytterbium (70) 4.0 1.1 × 102 1.0 2.7 × 101 8.9 × 102 2.4 × 104

Yb-175 3.0 × 101 8.1 × 102 9.0 × 10−1 2.4 × 101 6.6 × 103 1.8 × 105

Zn-65 Zinc (30) 2.0 5.4 × 101 2.0 5.4 × 101 3.0 × 102 8.2 × 103

Zn-69 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 1.8 × 106 4.9 × 107

Zn-69m (a) 3.0 8.1 × 101 6.0 × 10−1 1.6 × 101 1.2 × 105 3.3 × 106

Zr-88 Zirconium (40) 3.0 8.1 × 101 3.0 8.1 × 101 6.6 × 102 1.8 × 104

Zr-93 Unlimited Unlimited Unlimited Unlimited 9.3 × 10−5 2.5 × 10−3

Zr-95 (a) 2.0 5.4 × 101 8.0 × 10−1 2.2 × 101 7.9 × 102 2.1 × 104

Zr-97 (a) 4.0 × 10−1 1.1 × 101 4.0 × 10−1 1.1 × 101 7.1 × 104 1.9 × 106

a A1 and/or A2 values for these parent radionuclides include contributions from daughter nuclides with half-lives less than 10 days as listed in footnote (a) to Table 2 in the “IAEA Regulations for the Safe Transport of Radioactive Material, SSR-6” (IBR, see § 171.7 of this subchapter).

b The values of A1 and A2 in curies (Ci) are approximate and for information only; the regulatory standard units are Terabecquerels (TBq), (see § 171.10).

c The activity of Ir-192 in special form may be determined from a measurement of the rate of decay or a measurement of the radiation level at a prescribed distance from the source.

d These values apply only to compounds of uranium that take the chemical form of UF6, UO2 F2 and UO2 (NO3)2 in both normal and accident conditions of transport.

e These values apply only to compounds of uranium that take the chemical form of UO3, UF4, UCl4 and hexavalent compounds in both normal and accident conditions of transport.

f These values apply to all compounds of uranium other than those specified in notes (d) and (e) of this table.

g These values apply to unirradiated uranium only.

h [Reserved]

i A2 = 0.74 TBq (20 Ci) for Mo-99 for domestic use.

Collected 2026-08-27T02:26:34Z. Source file · JSON

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