Table of A 1 and A 2 values for radionuclides.

The table of A 1 and A 2 values for radionuclides is as follows: Symbol of radionuclide Element and atomic number A 1 (TBq) A 1 (Ci) b A 2 (TBq) A 2 (Ci) b Specific activity (TBq/g) (Ci/g) Ac-225 (a) Actinium (89) 8.0 × 10 −1 2.2 × 10 1 6.0 × 10 −3 1.6 × 10 −1 2.1 × 10 3 5.8 × 10 4 Ac-227 (a) 9.0 × 10 −1 2.4 × 10 1 9.0 × 10 −5 2.4 × 10 −3 2.7 7.2 × 10 1 Ac-228 6.0 × 10 −1 1.6 × 10 1 5.0 × 10 −1 1.4 × 10 1 8.4 × 10 4 2.2 × 10 6 Ag-105 Silver (47) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 1.1 × 10 3 3.0 × 10 4 Ag-108m (a) 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 9.7 × 10 −1 2.6 × 10 1 Ag-110m (a) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.8 × 10 2 4.7 × 10 3 Ag-111 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 5.8 × 10 3 1.6 × 10 5 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 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 1.3 × 10 −1 3.4 Am-242m (a) 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 3.6 × 10 −1 1.0 × 10 1 Am-243 (a) 5.0 1.4 × 10 2 1.0 × 10 −3 2.7 × 10 −2 7.4 × 10 −3 2.0 × 10 −1 Ar-37 Argon (18) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 3.7 × 10 3 9.9 × 10 4 Ar-39 4.0 × 10 1 1.1 × 10 3 2.0 × 10 1 5.4 × 10 2 1.3 3.4 × 10 1 Ar-41 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.5 × 10 6 4.2 × 10 7 As-72 Arsenic (33) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 6.2 × 10 4 1.7 × 10 6 As-73 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 8.2 × 10 2 2.2 × 10 4 As-74 1.0 2.7 × 10 1 9.0 × 10 −1 2.4 × 10 1 3.7 × 10 3 9.9 × 10 4 As-76 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 5.8 × 10 4 1.6 × 10 6 As-77 2.0 × 10 1 5.4 × 10 2 7.0 × 10 −1 1.9 × 10 1 3.9 × 10 4 1.0 × 10 6 At-211 (a) Astatine (85) 2.0 × 10 1 5.4 × 10 2 5.0 × 10 −1 1.4 × 10 1 7.6 × 10 4 2.1 × 10 6 Au-193 Gold (79) 7.0 1.9 × 10 2 2.0 5.4 × 10 1 3.4 × 10 4 9.2 × 10 5 Au-194 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.5 × 10 4 4.1 × 10 5 Au-195 1.0 × 10 1 2.7 × 10 2 6.0 1.6 × 10 2 1.4 × 10 2 3.7 × 10 3 Au-198 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 9.0 × 10 3 2.4 × 10 5 Au-199 1.0 × 10 1 2.7 × 10 2 6.0 × 10 −1 1.6 × 10 1 7.7 × 10 3 2.1 × 10 5 Ba-131 (a) Barium (56) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 3.1 × 10 3 8.4 × 10 4 Ba-133 3.0 8.1 × 10 1 3.0 8.1 × 10 1 9.4 2.6 × 10 2 Ba-133m 2.0 × 10 1 5.4 × 10 2 6.0 × 10 −1 1.6 × 10 1 2.2 × 10 4 6.1 × 10 5 Ba-140 (a) 5.0 × 10 −1 1.4 × 10 1 3.0 × 10 −1 8.1 2.7 × 10 3 7.3 × 10 4 Be-7 Beryllium (4) 2.0 × 10 1 5.4 × 10 2 2.0 × 10 1 5.4 × 10 2 1.3 × 10 4 3.5 × 10 5 Be-10 4.0 × 10 1 1.1 × 10 3 6.0 × 10 −1 1.6 × 10 1 8.3 × 10 −4 2.2 × 10 −2 Bi-205 Bismuth (83) 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 1.5 × 10 3 4.2 × 10 4 Bi-206 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 3.8 × 10 3 1.0 × 10 5 Bi-207 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 1.9 5.2 × 10 1 Bi-210 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 4.6 × 10 3 1.2 × 10 5 Bi-210m (a) 6.0 × 10 −1 1.6 × 10 1 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 × 10 1 6.0 × 10 −1 1.6 × 10 1 5.4 × 10 5 1.5 × 10 7 Bk-247 Berkelium (97) 8.0 2.2 × 10 2 8.0 × 10 −4 2.2 × 10 −2 3.8 × 10 −2 1.0 Bk-249 (a) 4.0 × 10 1 1.1 × 10 3 3.0 × 10 −1 8.1 6.1 × 10 1 1.6 × 10 3 Br-76 Bromine (35) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 9.4 × 10 4 2.5 × 10 6 Br-77 3.0 8.1 × 10 1 3.0 8.1 × 10 1 2.6 × 10 4 7.1 × 10 5 Br-82 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 4 1.1 × 10 6 C-11 Carbon (6) 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.1 × 10 7 8.4 × 10 8 C-14 4.0 × 10 1 1.1 × 10 3 3.0 8.1 × 10 1 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 × 10 1 1.1 × 10 3 1.0 2.7 × 10 1 6.6 × 10 2 1.8 × 10 4 Ca-47 (a) 3.0 8.1 × 10 1 3.0 × 10 −1 8.1 2.3 × 10 4 6.1 × 10 5 Cd-109 Cadmium (48) 3.0 × 10 1 8.1 × 10 2 2.0 5.4 × 10 1 9.6 × 10 1 2.6 × 10 3 Cd-113m 4.0 × 10 1 1.1 × 10 3 5.0 × 10 −1 1.4 × 10 1 8.3 2.2 × 10 2 Cd-115 (a) 3.0 8.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.9 × 10 4 5.1 × 10 5 Cd-115m 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 9.4 × 10 2 2.5 × 10 4 Ce-139 Cerium (58) 7.0 1.9 × 10 2 2.0 5.4 × 10 1 2.5 × 10 2 6.8 × 10 3 Ce-141 2.0 × 10 1 5.4 × 10 2 6.0 × 10 −1 1.6 × 10 1 1.1 × 10 3 2.8 × 10 4 Ce-143 9.0 × 10 −1 2.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.5 × 10 4 6.6 × 10 5 Ce-144 (a) 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 1.2 × 10 2 3.2 × 10 3 Cf-248 Californium (98) 4.0 × 10 1 1.1 × 10 3 6.0 × 10 −3 1.6 × 10 −1 5.8 × 10 1 1.6 × 10 3 Cf-249 3.0 8.1 × 10 1 8.0 × 10 −4 2.2 × 10 −2 1.5 × 10 −1 4.1 Cf-250 2.0 × 10 1 5.4 × 10 2 2.0 × 10 −3 5.4 × 10 −2 4.0 1.1 × 10 2 Cf-251 7.0 1.9 × 10 2 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 × 10 1 1.1 × 10 3 4.0 × 10 −2 1.1 1.1 × 10 3 2.9 × 10 4 Cf-254 1.0 × 10 −3 2.7 × 10 −2 1.0 × 10 −3 2.7 × 10 −2 3.1 × 10 2 8.5 × 10 3 Cl-36 Chlorine (17) 1.0 × 10 1 2.7 × 10 2 6.0 × 10 −1 1.6 × 10 1 1.2 × 10 −3 3.3 × 10 −2 Cl-38 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 4.9 × 10 6 1.3 × 10 8 Cm-240 Curium (96) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 7.5 × 10 2 2.0 × 10 4 Cm-241 2.0 5.4 × 10 1 1.0 2.7 × 10 1 6.1 × 10 2 1.7 × 10 4 Cm-242 4.0 × 10 1 1.1 × 10 3 1.0 × 10 −2 2.7 × 10 −1 1.2 × 10 2 3.3 × 10 3 Cm-243 9.0 2.4 × 10 2 1.0 × 10 −3 2.7 × 10 −2 1.9 5.2 × 10 1 Cm-244 2.0 × 10 1 5.4 × 10 2 2.0 × 10 −3 5.4 × 10 −2 3.0 8.1 × 10 1 Cm-245 9.0 2.4 × 10 2 9.0 × 10 −4 2.4 × 10 −2 6.4 × 10 −3 1.7 × 10 −1 Cm-246 9.0 2.4 × 10 2 9.0 × 10 −4 2.4 × 10 −2 1.1 × 10 −2 3.1 × 10 −1 Cm-247 (a) 3.0 8.1 × 10 1 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 × 10 1 5.0 × 10 −1 1.4 × 10 1 1.1 × 10 5 3.1 × 10 6 Co-56 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.1 × 10 3 3.0 × 10 4 Co-57 1.0 × 10 1 2.7 × 10 2 1.0 × 10 1 2.7 × 10 2 3.1 × 10 2 8.4 × 10 3 Co-58 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.2 × 10 3 3.2 × 10 4 Co-58m 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 2.2 × 10 5 5.9 × 10 6 Co-60 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 4.2 × 10 1 1.1 × 10 3 Cr-51 Chromium (24) 3.0 × 10 1 8.1 × 10 2 3.0 × 10 1 8.1 × 10 2 3.4 × 10 3 9.2 × 10 4 Cs-129 Cesium (55) 4.0 1.1 × 10 2 4.0 1.1 × 10 2 2.8 × 10 4 7.6 × 10 5 Cs-131 3.0 × 10 1 8.1 × 10 2 3.0 × 10 1 8.1 × 10 2 3.8 × 10 3 1.0 × 10 5 Cs-132 1.0 2.7 × 10 1 1.0 2.7 × 10 1 5.7 × 10 3 1.5 × 10 5 Cs-134 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 4.8 × 10 1 1.3 × 10 3 Cs-134m 4.0 × 10 1 1.1 × 10 3 6.0 × 10 −1 1.6 × 10 1 3.0 × 10 5 8.0 × 10 6 Cs-135 4.0 × 10 1 1.1 × 10 3 1.0 2.7 × 10 1 4.3 × 10 −5 1.2 × 10 −3 Cs-136 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 2.7 × 10 3 7.3 × 10 4 Cs-137 (a) 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.2 8.7 × 10 1 Cu-64 Copper (29) 6.0 1.6 × 10 2 1.0 2.7 × 10 1 1.4 × 10 5 3.9 × 10 6 Cu-67 1.0 × 10 1 2.7 × 10 2 7.0 × 10 −1 1.9 × 10 1 2.8 × 10 4 7.6 × 10 5 Dy-159 Dysprosium (66) 2.0 × 10 1 5.4 × 10 2 2.0 × 10 1 5.4 × 10 2 2.1 × 10 2 5.7 × 10 3 Dy-165 9.0 × 10 −1 2.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.0 × 10 5 8.2 × 10 6 Dy-166 (a) 9.0 × 10 −1 2.4 × 10 1 3.0 × 10 −1 8.1 8.6 × 10 3 2.3 × 10 5 Er-169 Erbium (68) 4.0 × 10 1 1.1 × 10 3 1.0 2.7 × 10 1 3.1 × 10 3 8.3 × 10 4 Er-171 8.0 × 10 −1 2.2 × 10 1 5.0 × 10 −1 1.4 × 10 1 9.0 × 10 4 2.4 × 10 6 Eu-147 Europium (63) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 1.4 × 10 3 3.7 × 10 4 Eu-148 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 6.0 × 10 2 1.6 × 10 4 Eu-149 2.0 × 10 1 5.4 × 10 2 2.0 × 10 1 5.4 × 10 2 3.5 × 10 2 9.4 × 10 3 Eu-150 (short lived) 2.0 5.4 × 10 1 7.0 × 10 −1 1.9 × 10 1 6.1 × 10 4 1.6 × 10 6 Eu-150 (long lived) 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 6.1 × 10 4 1.6 × 10 6 Eu-152 1.0 2.7 × 10 1 1.0 2.7 × 10 1 6.5 1.8 × 10 2 Eu-152m 8.0 × 10 −1 2.2 × 10 1 8.0 × 10 −1 2.2 × 10 1 8.2 × 10 4 2.2 × 10 6 Eu-154 9.0 × 10 −1 2.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 9.8 2.6 × 10 2 Eu-155 2.0 × 10 1 5.4 × 10 2 3.0 8.1 × 10 1 1.8 × 10 1 4.9 × 10 2 Eu-156 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 2.0 × 10 3 5.5 × 10 4 F-18 Fluorine (9) 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.5 × 10 6 9.5 × 10 7 Fe-52 (a) Iron (26) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 2.7 × 10 5 7.3 × 10 6 Fe-55 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 8.8 × 10 1 2.4 × 10 3 Fe-59 9.0 × 10 −1 2.4 × 10 1 9.0 × 10 −1 2.4 × 10 1 1.8 × 10 3 5.0 × 10 4 Fe-60 (a) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −1 5.4 7.4 × 10 −4 2.0 × 10 −2 Ga-67 Gallium (31) 7.0 1.9 × 10 2 3.0 8.1 × 10 1 2.2 × 10 4 6.0 × 10 5 Ga-68 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 1.5 × 10 6 4.1 × 10 7 Ga-72 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.1 × 10 5 3.1 × 10 6 Gd-146 (a) Gadolinium (64) 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 6.9 × 10 2 1.9 × 10 4 Gd-148 2.0 × 10 1 5.4 × 10 2 2.0 × 10 −3 5.4 × 10 −2 1.2 3.2 × 10 1 Gd-153 1.0 × 10 1 2.7 × 10 2 9.0 2.4 × 10 2 1.3 × 10 2 3.5 × 10 3 Gd-159 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.9 × 10 4 1.1 × 10 6 Ge-68 (a) Germanium (32) 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 2.6 × 10 2 7.1 × 10 3 Ge-71 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 5.8 × 10 3 1.6 × 10 5 Ge-77 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.3 × 10 5 3.6 × 10 6 Hf-172 (a) Hafnium (72) 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 4.1 × 10 1 1.1 × 10 3 Hf-175 3.0 8.1 × 10 1 3.0 8.1 × 10 1 3.9 × 10 2 1.1 × 10 4 Hf-181 2.0 5.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 6.3 × 10 2 1.7 × 10 4 Hf-182 Unlimited Unlimited Unlimited Unlimited 8.1 × 10 −6 2.2 × 10 −4 Hg-194 (a) Mercury (80) 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.3 × 10 −1 3.5 Hg-195m (a) 3.0 8.1 × 10 1 7.0 × 10 −1 1.9 × 10 1 1.5 × 10 4 4.0 × 10 5 Hg-197 2.0 × 10 1 5.4 × 10 2 1.0 × 10 1 2.7 × 10 2 9.2 × 10 3 2.5 × 10 5 Hg-197m 1.0 × 10 1 2.7 × 10 2 4.0 × 10 −1 1.1 × 10 1 2.5 × 10 4 6.7 × 10 5 Hg-203 5.0 1.4 × 10 2 1.0 2.7 × 10 1 5.1 × 10 2 1.4 × 10 4 Ho-166 Holmium (67) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 2.6 × 10 4 7.0 × 10 5 Ho-166m 6.0 × 10 −1 1.6 × 10 1 5.0 × 10 −1 1.4 × 10 1 6.6 × 10 −2 1.8 I-123 Iodine (53) 6.0 1.6 × 10 2 3.0 8.1 × 10 1 7.1 × 10 4 1.9 × 10 6 I-124 1.0 2.7 × 10 1 1.0 2.7 × 10 1 9.3 × 10 3 2.5 × 10 5 I-125 2.0 × 10 1 5.4 × 10 2 3.0 8.1 × 10 1 6.4 × 10 2 1.7 × 10 4 I-126 2.0 5.4 × 10 1 1.0 2.7 × 10 1 2.9 × 10 3 8.0 × 10 4 I-129 Unlimited Unlimited Unlimited Unlimited 6.5 × 10 −6 1.8 × 10 −4 I-131 3.0 8.1 × 10 1 7.0 × 10 −1 1.9 × 10 1 4.6 × 10 3 1.2 × 10 5 I-132 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 3.8 × 10 5 1.0 × 10 7 I-133 7.0 × 10 −1 1.9 × 10 1 6.0 × 10 −1 1.6 × 10 1 4.2 × 10 4 1.1 × 10 6 I-134 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 9.9 × 10 5 2.7 × 10 7 I-135 (a) 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.3 × 10 5 3.5 × 10 6 In-111 Indium (49) 3.0 8.1 × 10 1 3.0 8.1 × 10 1 1.5 × 10 4 4.2 × 10 5 In-113m 4.0 1.1 × 10 2 2.0 5.4 × 10 1 6.2 × 10 5 1.7 × 10 7 In-114m (a) 1.0 × 10 1 2.7 × 10 2 5.0 × 10 −1 1.4 × 10 1 8.6 × 10 2 2.3 × 10 4 In-115m 7.0 1.9 × 10 2 1.0 2.7 × 10 1 2.2 × 10 5 6.1 × 10 6 Ir-189 (a) Iridium (77) 1.0 × 10 1 2.7 × 10 2 1.0 × 10 1 2.7 × 10 2 1.9 × 10 3 5.2 × 10 4 Ir-190 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 2.3 × 10 3 6.2 × 10 4 Ir-192 (c) 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.4 × 10 2 9.2 × 10 3 Ir-194 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 3.1 × 10 4 8.4 × 10 5 K-40 Potassium (19) 9.0 × 10 −1 2.4 × 10 1 9.0 × 10 −1 2.4 × 10 1 2.4 × 10 −7 6.4 × 10 −6 K-42 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 2.2 × 10 5 6.0 × 10 6 K-43 7.0 × 10 −1 1.9 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.2 × 10 5 3.3 × 10 6 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 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 7.8 × 10 −4 2.1 × 10 −2 Kr-85 1.0 × 10 1 2.7 × 10 2 1.0 × 10 1 2.7 × 10 2 1.5 × 10 1 3.9 × 10 2 Kr-85m 8.0 2.2 × 10 2 3.0 8.1 × 10 1 3.0 × 10 5 8.2 × 10 6 Kr-87 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 1.0 × 10 6 2.8 × 10 7 La-137 Lanthanum (57) 3.0 × 10 1 8.1 × 10 2 6.0 1.6 × 10 2 1.6 × 10 −3 4.4 × 10 −2 La-140 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 2.1 × 10 4 5.6 × 10 5 Lu-172 Lutetium (71) 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 4.2 × 10 3 1.1 × 10 5 Lu-173 8.0 2.2 × 10 2 8.0 2.2 × 10 2 5.6 × 10 1 1.5 × 10 3 Lu-174 9.0 2.4 × 10 2 9.0 2.4 × 10 2 2.3 × 10 1 6.2 × 10 2 Lu-174m 2.0 × 10 1 5.4 × 10 2 1.0 × 10 1 2.7 × 10 2 2.0 × 10 2 5.3 × 10 3 Lu-177 3.0 × 10 1 8.1 × 10 2 7.0 × 10 −1 1.9 × 10 1 4.1 × 10 3 1.1 × 10 5 Mg-28 (a) Magnesium (12) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 2.0 × 10 5 5.4 × 10 6 Mn-52 Manganese (25) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.6 × 10 4 4.4 × 10 5 Mn-53 Unlimited Unlimited Unlimited Unlimited 6.8 × 10 −5 1.8 × 10 −3 Mn-54 1.0 2.7 × 10 1 1.0 2.7 × 10 1 2.9 × 10 2 7.7 × 10 3 Mn-56 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 8.0 × 10 5 2.2 × 10 7 Mo-93 Molybdenum (42) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 1 5.4 × 10 2 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 × 10 1 6.0 × 10 −1 1.6 × 10 1 5.4 × 10 7 1.5 × 10 9 Na-22 Sodium (11) 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 2.3 × 10 2 6.3 × 10 3 Na-24 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 3.2 × 10 5 8.7 × 10 6 Nb-93m Niobium (41) 4.0 × 10 1 1.1 × 10 3 3.0 × 10 1 8.1 × 10 2 8.8 2.4 × 10 2 Nb-94 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 6.9 × 10 −3 1.9 × 10 −1 Nb-95 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.5 × 10 3 3.9 × 10 4 Nb-97 9.0 × 10 −1 2.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 9.9 × 10 5 2.7 × 10 7 Nd-147 Neodymium (60) 6.0 1.6 × 10 2 6.0 × 10 −1 1.6 × 10 1 3.0 × 10 3 8.1 × 10 4 Nd-149 6.0 × 10 −1 1.6 × 10 1 5.0 × 10 −1 1.4 × 10 1 4.5 × 10 5 1.2 × 10 7 Ni-59 Nickel (28) Unlimited Unlimited Unlimited Unlimited 3.0 × 10 −3 8.0 × 10 −2 Ni-63 4.0 × 10 1 1.1 × 10 3 3.0 × 10 1 8.1 × 10 2 2.1 5.7 × 10 1 Ni-65 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 7.1 × 10 5 1.9 × 10 7 Np-235 Neptunium (93) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 5.2 × 10 1 1.4 × 10 3 Np-236 (short-lived) 2.0 × 10 1 5.4 × 10 2 2.0 5.4 × 10 1 4.7 × 10 −4 1.3 × 10 −2 Np-236 (long-lived) 9.0 × 10 0 2.4 × 10 2 2.0 × 10 −2 5.4 × 10 −1 4.7 × 10 −4 1.3 × 10 −2 Np-237 2.0 × 10 1 5.4 × 10 2 2.0 × 10 −3 5.4 × 10 −2 2.6 × 10 −5 7.1 × 10 −4 Np-239 7.0 1.9 × 10 2 4.0 × 10 −1 1.1 × 10 1 8.6 × 10 3 2.3 × 10 5 Os-185 Osmium (76) 1.0 2.7 × 10 1 1.0 2.7 × 10 1 2.8 × 10 2 7.5 × 10 3 Os-191 1.0 × 10 1 2.7 × 10 2 2.0 5.4 × 10 1 1.6 × 10 3 4.4 × 10 4 Os-191m 4.0 × 10 1 1.1 × 10 3 3.0 × 10 1 8.1 × 10 2 4.6 × 10 4 1.3 × 10 6 Os-193 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.0 × 10 4 5.3 × 10 5 Os-194 (a) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.1 × 10 1 3.1 × 10 2 P-32 Phosphorus (15) 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 1.1 × 10 4 2.9 × 10 5 P-33 4.0 × 10 1 1.1 × 10 3 1.0 2.7 × 10 1 5.8 × 10 3 1.6 × 10 5 Pa-230 (a) Protactinium (91) 2.0 5.4 × 10 1 7.0 × 10 −2 1.9 1.2 × 10 3 3.3 × 10 4 Pa-231 4.0 1.1 × 10 2 4.0 × 10 −4 1.1 × 10 −2 1.7 × 10 −3 4.7 × 10 −2 Pa-233 5.0 1.4 × 10 2 7.0 × 10 −1 1.9 × 10 1 7.7 × 10 2 2.1 × 10 4 Pb-201 Lead (82) 1.0 2.7 × 10 1 1.0 2.7 × 10 1 6.2 × 10 4 1.7 × 10 6 Pb-202 4.0 × 10 1 1.1 × 10 3 2.0 × 10 1 5.4 × 10 2 1.2 × 10 −4 3.4 × 10 −3 Pb-203 4.0 1.1 × 10 2 3.0 8.1 × 10 1 1.1 × 10 4 3.0 × 10 5 Pb-205 Unlimited Unlimited Unlimited Unlimited 4.5 × 10 −6 1.2 × 10 −4 Pb-210 (a) 1.0 2.7 × 10 1 5.0 × 10 −2 1.4 2.8 7.6 × 10 1 Pb-212 (a) 7.0 × 10 −1 1.9 × 10 1 2.0 × 10 −1 5.4 5.1 × 10 4 1.4 × 10 6 Pd-103 (a) Palladium (46) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 2.8 × 10 3 7.5 × 10 4 Pd-107 Unlimited Unlimited Unlimited Unlimited 1.9 × 10 −5 5.1 × 10 −4 Pd-109 2.0 5.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 7.9 × 10 4 2.1 × 10 6 Pm-143 Promethium (61) 3.0 8.1 × 10 1 3.0 8.1 × 10 1 1.3 × 10 2 3.4 × 10 3 Pm-144 7.0 × 10 −1 1.9 × 10 1 7.0 × 10 −1 1.9 × 10 1 9.2 × 10 1 2.5 × 10 3 Pm-145 3.0 × 10 1 8.1 × 10 2 1.0 × 10 1 2.7 × 10 2 5.2 1.4 × 10 2 Pm-147 4.0 × 10 1 1.1 × 10 3 2.0 5.4 × 10 1 3.4 × 10 1 9.3 × 10 2 Pm-148m (a) 8.0 × 10 −1 2.2 × 10 1 7.0 × 10 −1 1.9 × 10 1 7.9 × 10 2 2.1 × 10 4 Pm-149 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.5 × 10 4 4.0 × 10 5 Pm-151 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.7 × 10 4 7.3 × 10 5 Po-210 Polonium (84) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 1.7 × 10 2 4.5 × 10 3 Pr-142 Praseodymium (59) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 4.3 × 10 4 1.2 × 10 6 Pr-143 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.5 × 10 3 6.7 × 10 4 Pt-188 (a) Platinum (78) 1.0 2.7 × 10 1 8.0 × 10 −1 2.2 × 10 1 2.5 × 10 3 6.8 × 10 4 Pt-191 4.0 1.1 × 10 2 3.0 8.1 × 10 1 8.7 × 10 3 2.4 × 10 5 Pt-193 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 1.4 3.7 × 10 1 Pt-193m 4.0 × 10 1 1.1 × 10 3 5.0 × 10 −1 1.4 × 10 1 5.8 × 10 3 1.6 × 10 5 Pt-195m 1.0 × 10 1 2.7 × 10 2 5.0 × 10 −1 1.4 × 10 1 6.2 × 10 3 1.7 × 10 5 Pt-197 2.0 × 10 1 5.4 × 10 2 6.0 × 10 −1 1.6 × 10 1 3.2 × 10 4 8.7 × 10 5 Pt-197m 1.0 × 10 1 2.7 × 10 2 6.0 × 10 −1 1.6 × 10 1 3.7 × 10 5 1.0 × 10 7 Pu-236 Plutonium (94) 3.0 × 10 1 8.1 × 10 2 3.0 × 10 −3 8.1 × 10 −2 2.0 × 10 1 5.3 × 10 2 Pu-237 2.0 × 10 1 5.4 × 10 2 2.0 × 10 1 5.4 × 10 2 4.5 × 10 2 1.2 × 10 4 Pu-238 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 6.3 × 10 −1 1.7 × 10 1 Pu-239 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 2.3 × 10 −3 6.2 × 10 −2 Pu-240 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 8.4 × 10 −3 2.3 × 10 −1 Pu-241 (a) 4.0 × 10 1 1.1 × 10 3 6.0 × 10 −2 1.6 3.8 1.0 × 10 2 Pu-242 1.0 × 10 1 2.7 × 10 2 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 × 10 1 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 × 10 1 7.0 × 10 −3 1.9 × 10 −1 1.9 × 10 3 5.1 × 10 4 Ra-224 (a) 4.0 × 10 −1 1.1 × 10 1 2.0 × 10 −2 5.4 × 10 −1 5.9 × 10 3 1.6 × 10 5 Ra-225 (a) 2.0 × 10 −1 5.4 4.0 × 10 −3 1.1 × 10 −1 1.5 × 10 3 3.9 × 10 4 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 × 10 1 2.0 × 10 −2 5.4 × 10 −1 1.0 × 10 1 2.7 × 10 2 Rb-81 Rubidium (37) 2.0 5.4 × 10 1 8.0 × 10 −1 2.2 × 10 1 3.1 × 10 5 8.4 × 10 6 Rb-83 (a) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 6.8 × 10 2 1.8 × 10 4 Rb-84 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.8 × 10 3 4.7 × 10 4 Rb-86 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 3.0 × 10 3 8.1 × 10 4 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 × 10 1 1.0 2.7 × 10 1 6.9 × 10 2 1.9 × 10 4 Re-184m 3.0 8.1 × 10 1 1.0 2.7 × 10 1 1.6 × 10 2 4.3 × 10 3 Re-186 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 6.9 × 10 3 1.9 × 10 5 Re-187 Unlimited Unlimited Unlimited Unlimited 1.4 × 10 −9 3.8 × 10 −8 Re-188 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 3.6 × 10 4 9.8 × 10 5 Re-189 (a) 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.5 × 10 4 6.8 × 10 5 Re(nat) Unlimited Unlimited Unlimited Unlimited 0.0 2.4 × 10 −8 Rh-99 Rhodium (45) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 3.0 × 10 3 8.2 × 10 4 Rh-101 4.0 1.1 × 10 2 3.0 8.1 × 10 1 4.1 × 10 1 1.1 × 10 3 Rh-102 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 4.5 × 10 1 1.2 × 10 3 Rh-102m 2.0 5.4 × 10 1 2.0 5.4 × 10 1 2.3 × 10 2 6.2 × 10 3 Rh-103m 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 1.2 × 10 6 3.3 × 10 7 Rh-105 1.0 × 10 1 2.7 × 10 2 8.0 × 10 −1 2.2 × 10 1 3.1 × 10 4 8.4 × 10 5 Rn-222 (a) Radon (86) 3.0 × 10 −1 8.1 4.0 × 10 −3 1.1 × 10 −1 5.7 × 10 3 1.5 × 10 5 Ru-97 Ruthenium (44) 5.0 1.4 × 10 2 5.0 1.4 × 10 2 1.7 × 10 4 4.6 × 10 5 Ru-103 (a) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 1.2 × 10 3 3.2 × 10 4 Ru-105 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.5 × 10 5 6.7 × 10 6 Ru-106 (a) 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 1.2 × 10 2 3.3 × 10 3 S-35 Sulphur (16) 4.0 × 10 1 1.1 × 10 3 3.0 8.1 × 10 1 1.6 × 10 3 4.3 × 10 4 Sb-122 Antimony (51) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.5 × 10 4 4.0 × 10 5 Sb-124 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 6.5 × 10 2 1.7 × 10 4 Sb-125 2.0 5.4 × 10 1 1.0 2.7 × 10 1 3.9 × 10 1 1.0 × 10 3 Sb-126 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 3.1 × 10 3 8.4 × 10 4 Sc-44 Scandium (21) 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 6.7 × 10 5 1.8 × 10 7 Sc-46 5.0 × 10 −1 1.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 1.3 × 10 3 3.4 × 10 4 Sc-47 1.0 × 10 1 2.7 × 10 2 7.0 × 10 −1 1.9 × 10 1 3.1 × 10 4 8.3 × 10 5 Sc-48 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 5.5 × 10 4 1.5 × 10 6 Se-75 Selenium (34) 3.0 8.1 × 10 1 3.0 8.1 × 10 1 5.4 × 10 2 1.5 × 10 4 Se-79 4.0 × 10 1 1.1 × 10 3 2.0 5.4 × 10 1 2.6 × 10 −3 7.0 × 10 −2 Si-31 Silicon (14) 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.4 × 10 6 3.9 × 10 7 Si-32 4.0 × 10 1 1.1 × 10 3 5.0 × 10 −1 1.4 × 10 1 3.9 1.1 × 10 2 Sm-145 Samarium (62) 1.0 × 10 1 2.7 × 10 2 1.0 × 10 1 2.7 × 10 2 9.8 × 10 1 2.6 × 10 3 Sm-147 Unlimited Unlimited Unlimited Unlimited 8.5 × 10 −10 2.3 × 10 −8 Sm-151 4.0 × 10 1 1.1 × 10 3 1.0 × 10 1 2.7 × 10 2 9.7 × 10 −1 2.6 × 10 1 Sm-153 9.0 2.4 × 10 2 6.0 × 10 −1 1.6 × 10 1 1.6 × 10 4 4.4 × 10 5 Sn-113 (a) Tin (50) 4.0 1.1 × 10 2 2.0 5.4 × 10 1 3.7 × 10 2 1.0 × 10 4 Sn-117m 7.0 1.9 × 10 2 4.0 × 10 −1 1.1 × 10 1 3.0 × 10 3 8.2 × 10 4 Sn-119m 4.0 × 10 1 1.1 × 10 3 3.0 × 10 1 8.1 × 10 2 1.4 × 10 2 3.7 × 10 3 Sn-121m (a) 4.0 × 10 1 1.1 × 10 3 9.0 × 10 −1 2.4 × 10 1 2.0 5.4 × 10 1 Sn-123 8.0 × 10 −1 2.2 × 10 1 6.0 × 10 −1 1.6 × 10 1 3.0 × 10 2 8.2 × 10 3 Sn-125 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 3 1.1 × 10 5 Sn-126 (a) 6.0 × 10 −1 1.6 × 10 1 4.0 × 10 −1 1.1 × 10 1 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 × 10 3 6.2 × 10 4 Sr-85 2.0 5.4 × 10 1 2.0 5.4 × 10 1 8.8 × 10 2 2.4 × 10 4 Sr-85m 5.0 1.4 × 10 2 5.0 1.4 × 10 2 1.2 × 10 6 3.3 × 10 7 Sr-87m 3.0 8.1 × 10 1 3.0 8.1 × 10 1 4.8 × 10 5 1.3 × 10 7 Sr-89 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.1 × 10 3 2.9 × 10 4 Sr-90 (a) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 5.1 1.4 × 10 2 Sr-91 (a) 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.3 × 10 5 3.6 × 10 6 Sr-92 (a) 1.0 2.7 × 10 1 3.0 × 10 −1 8.1 4.7 × 10 5 1.3 × 10 7 T(H-3) Tritium (1) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 3.6 × 10 2 9.7 × 10 3 Ta-178 (long-lived) Tantalum (73) 1.0 2.7 × 10 1 8.0 × 10 −1 2.2 × 10 1 4.2 × 10 6 1.1 × 10 8 Ta-179 3.0 × 10 1 8.1 × 10 2 3.0 × 10 1 8.1 × 10 2 4.1 × 10 1 1.1 × 10 3 Ta-182 9.0 × 10 −1 2.4 × 10 1 5.0 × 10 −1 1.4 × 10 1 2.3 × 10 2 6.2 × 10 3 Tb-157 Terbium (65) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 5.6 × 10 −1 1.5 × 10 1 Tb-158 1.0 2.7 × 10 1 1.0 2.7 × 10 1 5.6 × 10 −1 1.5 × 10 1 Tb-160 1.0 2.7 × 10 1 6.0 × 10 −1 1.6 × 10 1 4.2 × 10 2 1.1 × 10 4 Tc-95m (a) Technetium (43) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 8.3 × 10 2 2.2 × 10 4 Tc-96 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.2 × 10 4 3.2 × 10 5 Tc-96m (a) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.4 × 10 6 3.8 × 10 7 Tc-97 Unlimited Unlimited Unlimited Unlimited 5.2 × 10 −5 1.4 × 10 −3 Tc-97m 4.0 × 10 1 1.1 × 10 3 1.0 2.7 × 10 1 5.6 × 10 2 1.5 × 10 4 Tc-98 8.0 × 10 −1 2.2 × 10 1 7.0 × 10 −1 1.9 × 10 1 3.2 × 10 −5 8.7 × 10 −4 Tc-99 4.0 × 10 1 1.1 × 10 3 9.0 × 10 −1 2.4 × 10 1 6.3 × 10 −4 1.7 × 10 −2 Tc-99m 1.0 × 10 1 2.7 × 10 2 4.0 1.1 × 10 2 1.9 × 10 5 5.3 × 10 6 Te-121 Tellurium (52) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 2.4 × 10 3 6.4 × 10 4 Te-121m 5.0 1.4 × 10 2 3.0 8.1 × 10 1 2.6 × 10 2 7.0 × 10 3 Te-123m 8.0 2.2 × 10 2 1.0 2.7 × 10 1 3.3 × 10 2 8.9 × 10 3 Te-125m 2.0 × 10 1 5.4 × 10 2 9.0 × 10 −1 2.4 × 10 1 6.7 × 10 2 1.8 × 10 4 Te-127 2.0 × 10 1 5.4 × 10 2 7.0 × 10 −1 1.9 × 10 1 9.8 × 10 4 2.6 × 10 6 Te-127m (a) 2.0 × 10 1 5.4 × 10 2 5.0 × 10 −1 1.4 × 10 1 3.5 × 10 2 9.4 × 10 3 Te-129 7.0 × 10 −1 1.9 × 10 1 6.0 × 10 −1 1.6 × 10 1 7.7 × 10 5 2.1 × 10 7 Te-129m (a) 8.0 × 10 −1 2.2 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.1 × 10 3 3.0 × 10 4 Te-131m (a) 7.0 × 10 −1 1.9 × 10 1 5.0 × 10 −1 1.4 × 10 1 3.0 × 10 4 8.0 × 10 5 Te-132 (a) 5.0 × 10 −1 1.4 × 10 1 4.0 × 10 −1 1.1 × 10 1 1.1 × 10 4 3.0 × 10 5 Th-227 Thorium (90) 1.0 × 10 1 2.7 × 10 2 5.0 × 10 −3 1.4 × 10 −1 1.1 × 10 3 3.1 × 10 4 Th-228 (a) 5.0 × 10 −1 1.4 × 10 1 1.0 × 10 −3 2.7 × 10 −2 3.0 × 10 1 8.2 × 10 2 Th-229 5.0 1.4 × 10 2 5.0 × 10 −4 1.4 × 10 −2 7.9 × 10 −3 2.1 × 10 −1 Th-230 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 7.6 × 10 −4 2.1 × 10 −2 Th-231 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 2.0 × 10 4 5.3 × 10 5 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 × 10 2 2.3 × 10 4 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 × 10 1 4.0 × 10 −1 1.1 × 10 1 6.4 1.7 × 10 2 Tl-200 Thallium (81) 9.0 × 10 −1 2.4 × 10 1 9.0 × 10 −1 2.4 × 10 1 2.2 × 10 4 6.0 × 10 5 Tl-201 1.0 × 10 1 2.7 × 10 2 4.0 1.1 × 10 2 7.9 × 10 3 2.1 × 10 5 Tl-202 2.0 5.4 × 10 1 2.0 5.4 × 10 1 2.0 × 10 3 5.3 × 10 4 Tl-204 1.0 × 10 1 2.7 × 10 2 7.0 × 10 −1 1.9 × 10 1 1.7 × 10 1 4.6 × 10 2 Tm-167 Thulium (69) 7.0 1.9 × 10 2 8.0 × 10 −1 2.2 × 10 1 3.1 × 10 3 8.5 × 10 4 Tm-170 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.2 × 10 2 6.0 × 10 3 Tm-171 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 U-230 (fast lung absorption) (a)(d) Uranium (92) 4.0 × 10 1 1.1 × 10 3 1.0 × 10 −1 2.7 1.0 × 10 3 2.7 × 10 4 U-230 (medium lung absorption) (a)(e) 4.0 × 10 1 1.1 × 10 3 4.0 × 10 −3 1.1 × 10 −1 1.0 × 10 3 2.7 × 10 4 U-230 (slow lung absorption) (a)(f) 3.0 × 10 1 8.1 × 10 2 3.0 × 10 −3 8.1 × 10 −2 1.0 × 10 3 2.7 × 10 4 U-232 (fast lung absorption) (d) 4.0 × 10 1 1.1 × 10 3 1.0 × 10 −2 2.7 × 10 −1 8.3 × 10 −1 2.2 × 10 1 U-232 (medium lung absorption) (e) 4.0 × 10 1 1.1 × 10 3 7.0 × 10 −3 1.9 × 10 −1 8.3 × 10 −1 2.2 × 10 1 U-232 (slow lung absorption) (f) 1.0 × 10 1 2.7 × 10 2 1.0 × 10 −3 2.7 × 10 −2 8.3 × 10 −1 2.2 × 10 1 U-233 (fast lung absorption) (d) 4.0 × 10 1 1.1 × 10 3 9.0 × 10 −2 2.4 3.6 × 10 −4 9.7 × 10 −3 U-233 (medium lung absorption) (e) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 3.6 × 10 −4 9.7 × 10 −3 U-233 (slow lung absorption) (f) 4.0 × 10 1 1.1 × 10 3 6.0 × 10 −3 1.6 × 10 −1 3.6 × 10 −4 9.7 × 10 −3 U-234 (fast lung absorption) (d) 4.0 × 10 1 1.1 × 10 3 9.0 × 10 −2 2.4 2.3 × 10 −4 6.2 × 10 −3 U-234 (medium lung absorption) (e) 4.0 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 2.3 × 10 −4 6.2 × 10 −3 U-234 (slow lung absorption) (f) 4.0 × 10 1 1.1 × 10 3 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 × 10 1 1.1 × 10 3 2.0 × 10 −2 5.4 × 10 −1 2.4 × 10 −6 6.5 × 10 −5 U-236 (slow lung absorption) (f) 4.0 × 10 1 1.1 × 10 3 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 × 10 1 4.0 × 10 −1 1.1 × 10 1 6.3 × 10 3 1.7 × 10 5 V-49 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 3.0 × 10 2 8.1 × 10 3 W-178 (a) Tungsten (74) 9.0 2.4 × 10 2 5.0 1.4 × 10 2 1.3 × 10 3 3.4 × 10 4 W-181 3.0 × 10 1 8.1 × 10 2 3.0 × 10 1 8.1 × 10 2 2.2 × 10 2 6.0 × 10 3 W-185 4.0 × 10 1 1.1 × 10 3 8.0 × 10 −1 2.2 × 10 1 3.5 × 10 2 9.4 × 10 3 W-187 2.0 5.4 × 10 1 6.0 × 10 −1 1.6 × 10 1 2.6 × 10 4 7.0 × 10 5 W-188 (a) 4.0 × 10 −1 1.1 × 10 1 3.0 × 10 −1 8.1 3.7 × 10 2 1.0 × 10 4 Xe-122 (a) Xenon (54) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 4.8 × 10 4 1.3 × 10 6 Xe-123 2.0 5.4 × 10 1 7.0 × 10 −1 1.9 × 10 1 4.4 × 10 5 1.2 × 10 7 Xe-127 4.0 1.1 × 10 2 2.0 5.4 × 10 1 1.0 × 10 3 2.8 × 10 4 Xe-131m 4.0 × 10 1 1.1 × 10 3 4.0 × 10 1 1.1 × 10 3 3.1 × 10 3 8.4 × 10 4 Xe-133 2.0 × 10 1 5.4 × 10 2 1.0 × 10 1 2.7 × 10 2 6.9 × 10 3 1.9 × 10 5 Xe-135 3.0 8.1 × 10 1 2.0 5.4 × 10 1 9.5 × 10 4 2.6 × 10 6 Y-87 (a) Yttrium (39) 1.0 2.7 × 10 1 1.0 2.7 × 10 1 1.7 × 10 4 4.5 × 10 5 Y-88 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 5.2 × 10 2 1.4 × 10 4 Y-90 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 2.0 × 10 4 5.4 × 10 5 Y-91 6.0 × 10 −1 1.6 × 10 1 6.0 × 10 −1 1.6 × 10 1 9.1 × 10 2 2.5 × 10 4 Y-91m 2.0 5.4 × 10 1 2.0 5.4 × 10 1 1.5 × 10 6 4.2 × 10 7 Y-92 2.0 × 10 −1 5.4 2.0 × 10 −1 5.4 3.6 × 10 5 9.6 × 10 6 Y-93 3.0 × 10 −1 8.1 3.0 × 10 −1 8.1 1.2 × 10 5 3.3 × 10 6 Yb-169 Ytterbium (70) 4.0 1.1 × 10 2 1.0 2.7 × 10 1 8.9 × 10 2 2.4 × 10 4 Yb-175 3.0 × 10 1 8.1 × 10 2 9.0 × 10 −1 2.4 × 10 1 6.6 × 10 3 1.8 × 10 5 Zn-65 Zinc (30) 2.0 5.4 × 10 1 2.0 5.4 × 10 1 3.0 × 10 2 8.2 × 10 3 Zn-69 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.8 × 10 6 4.9 × 10 7 Zn-69m (a) 3.0 8.1 × 10 1 6.0 × 10 −1 1.6 × 10 1 1.2 × 10 5 3.3 × 10 6 Zr-88 Zirconium (40) 3.0 8.1 × 10 1 3.0 8.1 × 10 1 6.6 × 10 2 1.8 × 10 4 Zr-93 Unlimited Unlimited Unlimited Unlimited 9.3 × 10 −5 2.5 × 10 −3 Zr-95 (a) 2.0 5.4 × 10 1 8.0 × 10 −1 2.2 × 10 1 7.9 × 10 2 2.1 × 10 4 Zr-97 (a) 4.0 × 10 −1 1.1 × 10 1 4.0 × 10 −1 1.1 × 10 1 7.1 × 10 4 1.9 × 10 6 a A 1 and/or A 2 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 A 1 and A 2 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 UF 6 , UO 2 F 2 and UO 2 (NO 3 ) 2 in both normal and accident conditions of transport. e These values apply only to compounds of uranium that take the chemical form of UO 3 , UF 4 , UCl 4 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 A 2 = 0.74 TBq (20 Ci) for Mo-99 for domestic use. [69 FR 3678, Jan. 26, 2004; 69 FR 55119, Sept. 13, 2004, as amended at 71 FR 54395, Sept. 14, 2006; 77 FR 60942, Oct. 5, 2012; 79 FR 40615, July 11, 2014; 80 FR 1163, Jan. 8, 2015; 85 FR 83401, Dec. 21, 2020]