The table of A1 and A2 values for radionuclides is as follows: ----------------------------------------------------------------------------------------------------------------
Specific activity
Symbol of radionuclide Element and A1 (TBq) A1 (Ci) A2 (TBq) A2 (Ci) -------------------------
atomic number \b\ \b\ (TBq/g) (Ci/g)----------------------------------------------------------------------------------------------------------------Ac-225 (a)................... Actinium (89).. 8.0 x 10- 2.2 x 6.0 x 10- 1.6 x 10- 2.1 x 10\3\ 5.8 x 10\4\
1 10\1\ 3 1Ac-227 (a)................... ............... 9.0 x 10- 2.4 x 9.0 x 10- 2.4 x 10- 2.7 7.2 x 10\1\
1 10\1\ 5 3Ac-228....................... ............... 6.0 x 10- 1.6 x 5.0 x 10- 1.4 x 8.4 x 10\4\ 2.2 x 10\6\
1 10\1\ 1 10\1\Ag-105....................... Silver (47).... 2.0 5.4 x 2.0 5.4 x 1.1 x 10\3\ 3.0 x 10\4\
10\1\ 10\1\Ag-108m (a).................. ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 9.7 x 10-1 2.6 x 10\1\
1 10\1\ 1 10\1\
Ag-110m (a).................. ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 1.8 x 10\2\ 4.7 x 10\3\
1 10\1\ 1 10\1\Ag-111....................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 5.8 x 10\3\ 1.6 x 10\5\
10\1\ 1 10\1\Al-26........................ Aluminum (13).. 1.0 x 10- 2.7 1.0 x 10- 2.7 7.0 x 10-4 1.9 x 10-2
1 1Am-241....................... Americium (95). 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 1.3 x 10-1 3.4
10\1\ 10\2\ 3 2Am-242m (a).................. ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 3.6 x 10-1 1.0 x 10\1\
10\1\ 10\2\ 3 2Am-243 (a)................... ............... 5.0 1.4 x 1.0 x 10- 2.7 x 10- 7.4 x 10-3 2.0 x 10-1
10\2\ 3 2Ar-37........................ Argon (18)..... 4.0 x 1.1 x 4.0 x 1.1 x 3.7 x 10\3\ 9.9 x 10\4\
10\1\ 10\3\ 10\1\ 10\3\Ar-39........................ ............... 4.0 x 1.1 x 2.0 x 5.4 x 1.3 3.4 x 10\1\
10\1\ 10\3\ 10\1\ 10\2\Ar-41........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.5 x 10\6\ 4.2 x 10\7\
1 1As-72........................ Arsenic (33)... 3.0 x 10- 8.1 3.0 x 10- 8.1 6.2 x 10\4\ 1.7 x 10\6\
1 1As-73........................ ............... 4.0 x 1.1 x 4.0 x 1.1 x 8.2 x 10\2\ 2.2 x 10\4\
10\1\ 10\3\ 10\1\ 10\3\As-74........................ ............... 1.0 2.7 x 9.0 x 10- 2.4 x 3.7 x 10\3\ 9.9 x 10\4\
10\1\ 1 10\1\As-76........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 5.8 x 10\4\ 1.6 x 10\6\
1 1As-77........................ ............... 2.0 x 5.4 x 7.0 x 10- 1.9 x 3.9 x 10\4\ 1.0 x 10\6\
10\1\ 10\2\ 1 10\1\At-211 (a)................... Astatine (85).. 2.0 x 5.4 x 5.0 x 10- 1.4 x 7.6 x 10\4\ 2.1 x 10\6\
10\1\ 10\2\ 1 10\1\Au-193....................... Gold (79)...... 7.0 1.9 x 2.0 5.4 x 3.4 x 10\4\ 9.2 x 10\5\
10\2\ 10\1\Au-194....................... ............... 1.0 2.7 x 1.0 2.7 x 1.5 x 10\4\ 4.1 x 10\5\
10\1\ 10\1\Au-195....................... ............... 1.0 x 2.7 x 6.0 1.6 x 1.4 x 10\2\ 3.7 x 10\3\
10\1\ 10\2\ 10\2\Au-198....................... ............... 1.0 2.7 x 6.0 x 10- 1.6 x 9.0 x 10\3\ 2.4 x 10\5\
10\1\ 1 10\1\Au-199....................... ............... 1.0 x 2.7 x 6.0 x 10- 1.6 x 7.7 x 10\3\ 2.1 x 10\5\
10\1\ 10\2\ 1 10\1\Ba-131 (a)................... Barium (56).... 2.0 5.4 x 2.0 5.4 x 3.1 x 10\3\ 8.4 x 10\4\
10\1\ 10\1\Ba-133....................... ............... 3.0 8.1 x 3.0 8.1 x 9.4 2.6 x 10\2\
10\1\ 10\1\Ba-133m...................... ............... 2.0 x 5.4 x 6.0 x 10- 1.6 x 2.2 x 10\4\ 6.1 x 10\5\
10\1\ 10\2\ 1 10\1\Ba-140 (a)................... ............... 5.0 x 10- 1.4 x 3.0 x 10- 8.1 2.7 x 10\3\ 7.3 x 10\4\
1 10\1\ 1Be-7......................... Beryllium (4).. 2.0 x 5.4 x 2.0 x 5.4 x 1.3 x 10\4\ 3.5 x 10\5\
10\1\ 10\2\ 10\1\ 10\2\Be-10........................ ............... 4.0 x 1.1 x 6.0 x 10- 1.6 x 8.3 x 10-4 2.2 x 10-2
10\1\ 10\3\ 1 10\1\Bi-205....................... Bismuth (83)... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 1.5 x 10\3\ 4.2 x 10\4\
1 10\1\ 1 10\1\Bi-206....................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 3.8 x 10\3\ 1.0 x 10\5\
1 1Bi-207....................... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 1.9 5.2 x 10\1\
1 10\1\ 1 10\1\Bi-210....................... ............... 1.0 2.7 x 6.0 x 10- 1.6 x 4.6 x 10\3\ 1.2 x 10\5\
10\1\ 1 10\1\Bi-210m (a).................. ............... 6.0 x 10- 1.6 x 2.0 x 10- 5.4 x 10- 2.1 x 10-5 5.7 x 10-4
1 10\1\ 2 1Bi-212 (a)................... ............... 7.0 x 10- 1.9 x 6.0 x 10- 1.6 x 5.4 x 10\5\ 1.5 x 10\7\
1 10\1\ 1 10\1\Bk-247....................... Berkelium (97). 8.0 2.2 x 8.0 x 10- 2.2 x 10- 3.8 x 10-2 1.0
10\2\ 4 2Bk-249 (a)................... ............... 4.0 x 1.1 x 3.0 x 10- 8.1 6.1 x 10\1\ 1.6 x 10\3\
10\1\ 10\3\ 1Br-76........................ Bromine (35)... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 9.4 x 10\4\ 2.5 x 10\6\
1 10\1\ 1 10\1\Br-77........................ ............... 3.0 8.1 x 3.0 8.1 x 2.6 x 10\4\ 7.1 x 10\5\
10\1\ 10\1\Br-82........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 4.0 x 10\4\ 1.1 x 10\6\
1 10\1\ 1 10\1\C-11......................... Carbon (6)..... 1.0 2.7 x 6.0 x 10- 1.6 x 3.1 x 10\7\ 8.4 x 10\8\
10\1\ 1 10\1\C-14......................... ............... 4.0 x 1.1 x 3.0 8.1 x 1.6 x 10-1 4.5
10\1\ 10\3\ 10\1\Ca-41........................ Calcium (20)... Unlimite Unlimite Unlimite Unlimite 3.1 x 10-3 8.5 x 10-2
d d d dCa-45........................ ............... 4.0 x 1.1 x 1.0 2.7 x 6.6 x 10\2\ 1.8 x 10\4\
10\1\ 10\3\ 10\1\Ca-47 (a).................... ............... 3.0 8.1 x 3.0 x 10- 8.1 2.3 x 10\4\ 6.1 x 10\5\
10\1\ 1Cd-109....................... Cadmium (48)... 3.0 x 8.1 x 2.0 5.4 x 9.6 x 10\1\ 2.6 x 10\3\
10\1\ 10\2\ 10\1\
Cd-113m...................... ............... 4.0 x 1.1 x 5.0 x 10- 1.4 x 8.3 2.2 x 10\2\
10\1\ 10\3\ 1 10\1\Cd-115 (a)................... ............... 3.0 8.1 x 4.0 x 10- 1.1 x 1.9 x 10\4\ 5.1 x 10\5\
10\1\ 1 10\1\Cd-115m...................... ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 9.4 x 10\2\ 2.5 x 10\4\
1 10\1\ 1 10\1\Ce-139....................... Cerium (58).... 7.0 1.9 x 2.0 5.4 x 2.5 x 10\2\ 6.8 x 10\3\
10\2\ 10\1\Ce-141....................... ............... 2.0 x 5.4 x 6.0 x 10- 1.6 x 1.1 x 10\3\ 2.8 x 10\4\
10\1\ 10\2\ 1 10\1\Ce-143....................... ............... 9.0 x 10- 2.4 x 6.0 x 10- 1.6 x 2.5 x 10\4\ 6.6 x 10\5\
1 10\1\ 1 10\1\Ce-144 (a)................... ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 1.2 x 10\2\ 3.2 x 10\3\
1 1Cf-248....................... Californium 4.0 x 1.1 x 6.0 x 10- 1.6 x 10- 5.8 x 10\1\ 1.6 x 10\3\
(98). 10\1\ 10\3\ 3 1Cf-249....................... ............... 3.0 8.1 x 8.0 x 10- 2.2 x 10- 1.5 x 10-1 4.1
10\1\ 4 2Cf-250....................... ............... 2.0 x 5.4 x 2.0 x 10- 5.4 x 10- 4.0 1.1 x 10\2\
10\1\ 10\2\ 3 2Cf-251....................... ............... 7.0 1.9 x 7.0 x 10- 1.9 x 10- 5.9 x 10-2 1.6
10\2\ 4 2Cf-252....................... ............... 1 x 10- 2.7 3.0 x 10- 8.1 x 10- 2.0 x 10 5.4 x 10
\1\ \3\ \2\ \1\ \2\Cf-253 (a)................... ............... 4.0 x 1.1 x 4.0 x 10- 1.1 1.1 x 10\3\ 2.9 x 10\4\
10\1\ 10\3\ 2Cf-254....................... ............... 1.0 x 10- 2.7 x 10- 1.0 x 10- 2.7 x 10- 3.1 x 10\2\ 8.5 x 10\3\
3 2 3 2Cl-36........................ Chlorine (17).. 1.0 x 2.7 x 6.0 x 10- 1.6 x 1.2 x 10-3 3.3 x 10-2
10\1\ 10\2\ 1 10\1\Cl-38........................ ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 4.9 x 10\6\ 1.3 x 10\8\
1 1Cm-240....................... Curium (96).... 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 7.5 x 10\2\ 2.0 x 10\4\
10\1\ 10\3\ 2 1Cm-241....................... ............... 2.0 5.4 x 1.0 2.7 x 6.1 x 10\2\ 1.7 x 10\4\
10\1\ 10\1\Cm-242....................... ............... 4.0 x 1.1 x 1.0 x 10- 2.7 x 10- 1.2 x 10\2\ 3.3 x 10\3\
10\1\ 10\3\ 2 1Cm-243....................... ............... 9.0 2.4 x 1.0 x 10- 2.7 x 10- 1.9 5.2 x 10\1\
10\2\ 3 2Cm-244....................... ............... 2.0 x 5.4 x 2.0 x 10- 5.4 x 10- 3.0 8.1 x 10\1\
10\1\ 10\2\ 3 2Cm-245....................... ............... 9.0 2.4 x 9.0 x 10- 2.4 x 10- 6.4 x 10-3 1.7 x 10-1
10\2\ 4 2Cm-246....................... ............... 9.0 2.4 x 9.0 x 10- 2.4 x 10- 1.1 x 10-2 3.1 x 10-1
10\2\ 4 2Cm-247 (a)................... ............... 3.0 8.1 x 1.0 x 10- 2.7 x 10- 3.4 x 10-6 9.3 x 10-5
10\1\ 3 2Cm-248....................... ............... 2.0 x 10- 5.4 x 10- 3.0 x 10- 8.1 x 10- 1.6 x 10-4 4.2 x 10-3
2 1 4 3Co-55........................ Cobalt (27).... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 1.1 x 10\5\ 3.1 x 10\6\
1 10\1\ 1 10\1\Co-56........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.1 x 10\3\ 3.0 x 10\4\
1 1Co-57........................ ............... 1.0 x 2.7 x 1.0 x 2.7 x 3.1 x 10\2\ 8.4 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Co-58........................ ............... 1.0 2.7 x 1.0 2.7 x 1.2 x 10\3\ 3.2 x 10\4\
10\1\ 10\1\Co-58m....................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 2.2 x 10\5\ 5.9 x 10\6\
10\1\ 10\3\ 10\1\ 10\3\Co-60........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 4.2 x 10\1\ 1.1 x 10\3\
1 10\1\ 1 10\1\Cr-51........................ Chromium (24).. 3.0 x 8.1 x 3.0 x 8.1 x 3.4 x 10\3\ 9.2 x 10\4\
10\1\ 10\2\ 10\1\ 10\2\Cs-129....................... Cesium (55).... 4.0 1.1 x 4.0 1.1 x 2.8 x 10\4\ 7.6 x 10\5\
10\2\ 10\2\Cs-131....................... ............... 3.0 x 8.1 x 3.0 x 8.1 x 3.8 x 10\3\ 1.0 x 10\5\
10\1\ 10\2\ 10\1\ 10\2\Cs-132....................... ............... 1.0 2.7 x 1.0 2.7 x 5.7 x 10\3\ 1.5 x 10\5\
10\1\ 10\1\Cs-134....................... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 4.8 x 10\1\ 1.3 x 10\3\
1 10\1\ 1 10\1\Cs-134m...................... ............... 4.0 x 1.1 x 6.0 x 10- 1.6 x 3.0 x 10\5\ 8.0 x 10\6\
10\1\ 10\3\ 1 10\1\Cs-135....................... ............... 4.0 x 1.1 x 1.0 2.7 x 4.3 x 10-5 1.2 x 10-3
10\1\ 10\3\ 10\1\Cs-136....................... ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 2.7 x 10\3\ 7.3 x 10\4\
1 10\1\ 1 10\1\Cs-137 (a)................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 3.2 8.7 x 10\1\
10\1\ 1 10\1\Cu-64........................ Copper (29).... 6.0 1.6 x 1.0 2.7 x 1.4 x 10\5\ 3.9 x 10\6\
10\2\ 10\1\Cu-67........................ ............... 1.0 x 2.7 x 7.0 x 10- 1.9 x 2.8 x 10\4\ 7.6 x 10\5\
10\1\ 10\2\ 1 10\1\
Dy-159....................... Dysprosium (66) 2.0 x 5.4 x 2.0 x 5.4 x 2.1 x 10\2\ 5.7 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Dy-165....................... ............... 9.0 x 10- 2.4 x 6.0 x 10- 1.6 x 3.0 x 10\5\ 8.2 x 10\6\
1 10\1\ 1 10\1\Dy-166 (a)................... ............... 9.0 x 10- 2.4 x 3.0 x 10- 8.1 8.6 x 10\3\ 2.3 x 10\5\
1 10\1\ 1Er-169....................... Erbium (68).... 4.0 x 1.1 x 1.0 2.7 x 3.1 x 10\3\ 8.3 x 10\4\
10\1\ 10\3\ 10\1\Er-171....................... ............... 8.0 x 10- 2.2 x 5.0 x 10- 1.4 x 9.0 x 10\4\ 2.4 x 10\6\
1 10\1\ 1 10\1\Eu-147....................... Europium (63).. 2.0 5.4 x 2.0 5.4 x 1.4 x 10\3\ 3.7 x 10\4\
10\1\ 10\1\Eu-148....................... ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 6.0 x 10\2\ 1.6 x 10\4\
1 10\1\ 1 10\1\Eu-149....................... ............... 2.0 x 5.4 x 2.0 x 5.4 x 3.5 x 10\2\ 9.4 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Eu-150 (short lived)......... ............... 2.0 5.4 x 7.0 x 10- 1.9 x 6.1 x 10\4\ 1.6 x 10\6\
10\1\ 1 10\1\Eu-150 (long lived).......... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 6.1 x 10\4\ 1.6 x 10\6\
1 10\1\ 1 10\1\Eu-152....................... ............... 1.0 2.7 x 1.0 2.7 x 6.5 1.8 x 10\2\
10\1\ 10\1\Eu-152m...................... ............... 8.0 x 10- 2.2 x 8.0 x 10- 2.2 x 8.2 x 10\4\ 2.2 x 10\6\
1 10\1\ 1 10\1\Eu-154....................... ............... 9.0 x 10- 2.4 x 6.0 x 10- 1.6 x 9.8 2.6 x 10\2\
1 10\1\ 1 10\1\Eu-155....................... ............... 2.0 x 5.4 x 3.0 8.1 x 1.8 x 10\1\ 4.9 x 10\2\
10\1\ 10\2\ 10\1\Eu-156....................... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 2.0 x 10\3\ 5.5 x 10\4\
1 10\1\ 1 10\1\F-18......................... Fluorine (9)... 1.0 2.7 x 6.0 x 10- 1.6 x 3.5 x 10\6\ 9.5 x 10\7\
10\1\ 1 10\1\Fe-52 (a).................... Iron (26)...... 3.0 x 10- 8.1 3.0 x 10- 8.1 2.7 x 10\5\ 7.3 x 10\6\
1 1Fe-55........................ ............... 4.0 x 1.1 x 4.0 x 1.1 x 8.8 x 10\1\ 2.4 x 10\3\
10\1\ 10\3\ 10\1\ 10\3\Fe-59........................ ............... 9.0 x 10- 2.4 x 9.0 x 10- 2.4 x 1.8 x 10\3\ 5.0 x 10\4\
1 10\1\ 1 10\1\Fe-60 (a).................... ............... 4.0 x 1.1 x 2.0 x 10- 5.4 7.4 x 10-4 2.0 x 10-2
10\1\ 10\3\ 1Ga-67........................ Gallium (31)... 7.0 1.9 x 3.0 8.1 x 2.2 x 10\4\ 6.0 x 10\5\
10\2\ 10\1\Ga-68........................ ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 1.5 x 10\6\ 4.1 x 10\7\
1 10\1\ 1 10\1\Ga-72........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 1.1 x 10\5\ 3.1 x 10\6\
1 10\1\ 1 10\1\Gd-146 (a)................... Gadolinium (64) 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 6.9 x 10\2\ 1.9 x 10\4\
1 10\1\ 1 10\1\Gd-148....................... ............... 2.0 x 5.4 x 2.0 x 10- 5.4 x 10- 1.2 3.2 x 10\1\
10\1\ 10\2\ 3 2Gd-153....................... ............... 1.0 x 2.7 x 9.0 2.4 x 1.3 x 10\2\ 3.5 x 10\3\
10\1\ 10\2\ 10\2\Gd-159....................... ............... 3.0 8.1 x 6.0 x 10- 1.6 x 3.9 x 10\4\ 1.1 x 10\6\
10\1\ 1 10\1\Ge-68 (a).................... Germanium (32). 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 2.6 x 10\2\ 7.1 x 10\3\
1 10\1\ 1 10\1\Ge-71........................ ............... 4.0 x 1.1 x 4.0 x 1.1 x 5.8 x 10\3\ 1.6 x 10\5\
10\1\ 10\3\ 10\1\ 10\3\Ge-77........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.3 x 10\5\ 3.6 x 10\6\
1 1Hf-172 (a)................... Hafnium (72)... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 4.1 x 10\1\ 1.1 x 10\3\
1 10\1\ 1 10\1\Hf-175....................... ............... 3.0 8.1 x 3.0 8.1 x 3.9 x 10\2\ 1.1 x 10\4\
10\1\ 10\1\Hf-181....................... ............... 2.0 5.4 x 5.0 x 10- 1.4 x 6.3 x 10\2\ 1.7 x 10\4\
10\1\ 1 10\1\Hf-182....................... ............... Unlimite Unlimite Unlimite Unlimite 8.1 x 10-6 2.2 x 10-4
d d d dHg-194 (a)................... Mercury (80)... 1.0 2.7 x 1.0 2.7 x 1.3 x 10-1 3.5
10\1\ 10\1\Hg-195m (a).................. ............... 3.0 8.1 x 7.0 x 10- 1.9 x 1.5 x 10\4\ 4.0 x 10\5\
10\1\ 1 10\1\Hg-197....................... ............... 2.0 x 5.4 x 1.0 x 2.7 x 9.2 x 10\3\ 2.5 x 10\5\
10\1\ 10\2\ 10\1\ 10\2\Hg-197m...................... ............... 1.0 x 2.7 x 4.0 x 10- 1.1 x 2.5 x 10\4\ 6.7 x 10\5\
10\1\ 10\2\ 1 10\1\Hg-203....................... ............... 5.0 1.4 x 1.0 2.7 x 5.1 x 10\2\ 1.4 x 10\4\
10\2\ 10\1\Ho-166....................... Holmium (67)... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 2.6 x 10\4\ 7.0 x 10\5\
1 10\1\ 1 10\1\Ho-166m...................... ............... 6.0 x 10- 1.6 x 5.0 x 10- 1.4 x 6.6 x 10-2 1.8
1 10\1\ 1 10\1\I-123........................ Iodine (53).... 6.0 1.6 x 3.0 8.1 x 7.1 x 10\4\ 1.9 x 10\6\
10\2\ 10\1\I-124........................ ............... 1.0 2.7 x 1.0 2.7 x 9.3 x 10\3\ 2.5 x 10\5\
10\1\ 10\1\I-125........................ ............... 2.0 x 5.4 x 3.0 8.1 x 6.4 x 10\2\ 1.7 x 10\4\
10\1\ 10\2\ 10\1\I-126........................ ............... 2.0 5.4 x 1.0 2.7 x 2.9 x 10\3\ 8.0 x 10\4\
10\1\ 10\1\I-129........................ ............... Unlimite Unlimite Unlimite Unlimite 6.5 x 10-6 1.8 x 10-4
d d d d
I-131........................ ............... 3.0 8.1 x 7.0 x 10- 1.9 x 4.6 x 10\3\ 1.2 x 10\5\
10\1\ 1 10\1\I-132........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 3.8 x 10\5\ 1.0 x 10\7\
1 10\1\ 1 10\1\I-133........................ ............... 7.0 x 10- 1.9 x 6.0 x 10- 1.6 x 4.2 x 10\4\ 1.1 x 10\6\
1 10\1\ 1 10\1\I-134........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 9.9 x 10\5\ 2.7 x 10\7\
1 1I-135 (a).................... ............... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 1.3 x 10\5\ 3.5 x 10\6\
1 10\1\ 1 10\1\In-111....................... Indium (49).... 3.0 8.1 x 3.0 8.1 x 1.5 x 10\4\ 4.2 x 10\5\
10\1\ 10\1\In-113m...................... ............... 4.0 1.1 x 2.0 5.4 x 6.2 x 10\5\ 1.7 x 10\7\
10\2\ 10\1\In-114m (a).................. ............... 1.0 x 2.7 x 5.0 x 10- 1.4 x 8.6 x 10\2\ 2.3 x 10\4\
10\1\ 10\2\ 1 10\1\In-115m...................... ............... 7.0 1.9 x 1.0 2.7 x 2.2 x 10\5\ 6.1 x 10\6\
10\2\ 10\1\Ir-189 (a)................... Iridium (77)... 1.0 x 2.7 x 1.0 x 2.7 x 1.9 x 10\3\ 5.2 x 10\4\
10\1\ 10\2\ 10\1\ 10\2\Ir-190....................... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 2.3 x 10\3\ 6.2 x 10\4\
1 10\1\ 1 10\1\Ir-192 (c)................... ............... 1.0 2.7 x 6.0 x 10- 1.6 x 3.4 x 10\2\ 9.2 x 10\3\
10\1\ 1 10\1\Ir-194....................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 3.1 x 10\4\ 8.4 x 10\5\
1 1K-40......................... Potassium (19). 9.0 x 10- 2.4 x 9.0 x 10- 2.4 x 2.4 x 10-7 6.4 x 10-6
1 10\1\ 1 10\1\K-42......................... ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 2.2 x 10\5\ 6.0 x 10\6\
1 1K-43......................... ............... 7.0 x 10- 1.9 x 6.0 x 10- 1.6 x 1.2 x 10\5\ 3.3 x 10\6\
1 10\1\ 1 10\1\Kr-79........................ Krypton (36)... 4.0 x 10 1.1 x 10 2.0 x 10 5.4 x 10 4.2 x 10 1.1 x 10
\0\ \2\ \0\ \1\ \4\ \6\Kr-81........................ Krypton (36)... 4.0 x 1.1 x 4.0 x 1.1 x 7.8 x 10-4 2.1 x 10-2
10\1\ 10\3\ 10\1\ 10\3\Kr-85........................ ............... 1.0 x 2.7 x 1.0 x 2.7 x 1.5 x 10\1\ 3.9 x 10\2\
10\1\ 10\2\ 10\1\ 10\2\Kr-85m....................... ............... 8.0 2.2 x 3.0 8.1 x 3.0 x 10\5\ 8.2 x 10\6\
10\2\ 10\1\Kr-87........................ ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 1.0 x 10\6\ 2.8 x 10\7\
1 1La-137....................... Lanthanum (57). 3.0 x 8.1 x 6.0 1.6 x 1.6 x 10-3 4.4 x 10-2
10\1\ 10\2\ 10\2\La-140....................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 2.1 x 10\4\ 5.6 x 10\5\
1 10\1\ 1 10\1\Lu-172....................... Lutetium (71).. 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 4.2 x 10\3\ 1.1 x 10\5\
1 10\1\ 1 10\1\Lu-173....................... ............... 8.0 2.2 x 8.0 2.2 x 5.6 x 10\1\ 1.5 x 10\3\
10\2\ 10\2\Lu-174....................... ............... 9.0 2.4 x 9.0 2.4 x 2.3 x 10\1\ 6.2 x 10\2\
10\2\ 10\2\Lu-174m...................... ............... 2.0 x 5.4 x 1.0 x 2.7 x 2.0 x 10\2\ 5.3 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Lu-177....................... ............... 3.0 x 8.1 x 7.0 x 10- 1.9 x 4.1 x 10\3\ 1.1 x 10\5\
10\1\ 10\2\ 1 10\1\Mg-28 (a).................... Magnesium (12). 3.0 x 10- 8.1 3.0 x 10- 8.1 2.0 x 10\5\ 5.4 x 10\6\
1 1Mn-52........................ Manganese (25). 3.0 x 10- 8.1 3.0 x 10- 8.1 1.6 x 10\4\ 4.4 x 10\5\
1 1Mn-53........................ ............... Unlimite Unlimite Unlimite Unlimite 6.8 x 10-5 1.8 x 10-3
d d d dMn-54........................ ............... 1.0 2.7 x 1.0 2.7 x 2.9 x 10\2\ 7.7 x 10\3\
10\1\ 10\1\Mn-56........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 8.0 x 10\5\ 2.2 x 10\7\
1 1Mo-93........................ Molybdenum (42) 4.0 x 1.1 x 2.0 x 5.4 x 4.1 x 10-2 1.1
10\1\ 10\3\ 10\1\ 10\2\Mo-99(a)(i).................. ............... 1.0 2.7 x 10 6.0 x 10- 1.6 x 10 1.8 x 10 4.8 x 10
\1\ \1\ \1\ \4\ \5\N-13......................... Nitrogen (7)... 9.0 x 10- 2.4 x 6.0 x 10- 1.6 x 5.4 x 10\7\ 1.5 x 10\9\
1 10\1\ 1 10\1\Na-22........................ Sodium (11).... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 2.3 x 10\2\ 6.3 x 10\3\
1 10\1\ 1 10\1\Na-24........................ ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 3.2 x 10\5\ 8.7 x 10\6\
1 1Nb-93m....................... Niobium (41)... 4.0 x 1.1 x 3.0 x 8.1 x 8.8 2.4 x 10\2\
10\1\ 10\3\ 10\1\ 10\2\Nb-94........................ ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 6.9 x 10-3 1.9 x 10-1
1 10\1\ 1 10\1\Nb-95........................ ............... 1.0 2.7 x 1.0 2.7 x 1.5 x 10\3\ 3.9 x 10\4\
10\1\ 10\1\Nb-97........................ ............... 9.0 x 10- 2.4 x 6.0 x 10- 1.6 x 9.9 x 10\5\ 2.7 x 10\7\
1 10\1\ 1 10\1\Nd-147....................... Neodymium (60). 6.0 1.6 x 6.0 x 10- 1.6 x 3.0 x 10\3\ 8.1 x 10\4\
10\2\ 1 10\1\Nd-149....................... ............... 6.0 x 10- 1.6 x 5.0 x 10- 1.4 x 4.5 x 10\5\ 1.2 x 10\7\
1 10\1\ 1 10\1\Ni-59........................ Nickel (28).... Unlimite Unlimite Unlimite Unlimite 3.0 x 10-3 8.0 x 10-2
d d d d
Ni-63........................ ............... 4.0 x 1.1 x 3.0 x 8.1 x 2.1 5.7 x 10\1\
10\1\ 10\3\ 10\1\ 10\2\Ni-65........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 7.1 x 10\5\ 1.9 x 10\7\
1 10\1\ 1 10\1\Np-235....................... Neptunium (93). 4.0 x 1.1 x 4.0 x 1.1 x 5.2 x 10\1\ 1.4 x 10\3\
10\1\ 10\3\ 10\1\ 10\3\Np-236 (short-lived)......... ............... 2.0 x 5.4 x 2.0 5.4 x 4.7 x 10-4 1.3 x 10-2
10\1\ 10\2\ 10\1\Np-236 (long-lived).......... ............... 9.0 x 2.4 x 2.0 x 10- 5.4 x 10- 4.7 x 10-4 1.3 x 10-2
10\0\ 10\2\ 2 1Np-237....................... ............... 2.0 x 5.4 x 2.0 x 10- 5.4 x 10- 2.6 x 10-5 7.1 x 10-4
10\1\ 10\2\ 3 2Np-239....................... ............... 7.0 1.9 x 4.0 x 10- 1.1 x 8.6 x 10\3\ 2.3 x 10\5\
10\2\ 1 10\1\Os-185....................... Osmium (76).... 1.0 2.7 x 1.0 2.7 x 2.8 x 10\2\ 7.5 x 10\3\
10\1\ 10\1\Os-191....................... ............... 1.0 x 2.7 x 2.0 5.4 x 1.6 x 10\3\ 4.4 x 10\4\
10\1\ 10\2\ 10\1\Os-191m...................... ............... 4.0 x 1.1 x 3.0 x 8.1 x 4.6 x 10\4\ 1.3 x 10\6\
10\1\ 10\3\ 10\1\ 10\2\Os-193....................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 2.0 x 10\4\ 5.3 x 10\5\
10\1\ 1 10\1\Os-194 (a)................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.1 x 10\1\ 3.1 x 10\2\
1 1P-32......................... Phosphorus (15) 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 1.1 x 10\4\ 2.9 x 10\5\
1 10\1\ 1 10\1\P-33......................... ............... 4.0 x 1.1 x 1.0 2.7 x 5.8 x 10\3\ 1.6 x 10\5\
10\1\ 10\3\ 10\1\Pa-230 (a)................... Protactinium 2.0 5.4 x 7.0 x 10- 1.9 1.2 x 10\3\ 3.3 x 10\4\
(91). 10\1\ 2Pa-231....................... ............... 4.0 1.1 x 4.0 x 10- 1.1 x 10- 1.7 x 10-3 4.7 x 10-2
10\2\ 4 2Pa-233....................... ............... 5.0 1.4 x 7.0 x 10- 1.9 x 7.7 x 10\2\ 2.1 x 10\4\
10\2\ 1 10\1\Pb-201....................... Lead (82)...... 1.0 2.7 x 1.0 2.7 x 6.2 x 10\4\ 1.7 x 10\6\
10\1\ 10\1\Pb-202....................... ............... 4.0 x 1.1 x 2.0 x 5.4 x 1.2 x 10-4 3.4 x 10-3
10\1\ 10\3\ 10\1\ 10\2\Pb-203....................... ............... 4.0 1.1 x 3.0 8.1 x 1.1 x 10\4\ 3.0 x 10\5\
10\2\ 10\1\Pb-205....................... ............... Unlimite Unlimite Unlimite Unlimite 4.5 x 10-6 1.2 x 10-4
d d d dPb-210 (a)................... ............... 1.0 2.7 x 5.0 x 10- 1.4 2.8 7.6 x 10\1\
10\1\ 2Pb-212 (a)................... ............... 7.0 x 10- 1.9 x 2.0 x 10- 5.4 5.1 x 10\4\ 1.4 x 10\6\
1 10\1\ 1Pd-103 (a)................... Palladium (46). 4.0 x 1.1 x 4.0 x 1.1 x 2.8 x 10\3\ 7.5 x 10\4\
10\1\ 10\3\ 10\1\ 10\3\Pd-107....................... ............... Unlimite Unlimite Unlimite Unlimite 1.9 x 10-5 5.1 x 10-4
d d d dPd-109....................... ............... 2.0 5.4 x 5.0 x 10- 1.4 x 7.9 x 10\4\ 2.1 x 10\6\
10\1\ 1 10\1\Pm-143....................... Promethium (61) 3.0 8.1 x 3.0 8.1 x 1.3 x 10\2\ 3.4 x 10\3\
10\1\ 10\1\Pm-144....................... ............... 7.0 x 10- 1.9 x 7.0 x 10- 1.9 x 9.2 x 10\1\ 2.5 x 10\3\
1 10\1\ 1 10\1\Pm-145....................... ............... 3.0 x 8.1 x 1.0 x 2.7 x 5.2 1.4 x 10\2\
10\1\ 10\2\ 10\1\ 10\2\Pm-147....................... ............... 4.0 x 1.1 x 2.0 5.4 x 3.4 x 10\1\ 9.3 x 10\2\
10\1\ 10\3\ 10\1\Pm-148m (a).................. ............... 8.0 x 10- 2.2 x 7.0 x 10- 1.9 x 7.9 x 10\2\ 2.1 x 10\4\
1 10\1\ 1 10\1\Pm-149....................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 1.5 x 10\4\ 4.0 x 10\5\
10\1\ 1 10\1\Pm-151....................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 2.7 x 10\4\ 7.3 x 10\5\
10\1\ 1 10\1\Po-210....................... Polonium (84).. 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 1.7 x 10\2\ 4.5 x 10\3\
10\1\ 10\3\ 2 1Pr-142....................... Praseodymium 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 4.3 x 10\4\ 1.2 x 10\6\
(59). 1 10\1\ 1 10\1\Pr-143....................... ............... 3.0 8.1 x 6.0 x 10- 1.6 x 2.5 x 10\3\ 6.7 x 10\4\
10\1\ 1 10\1\Pt-188 (a)................... Platinum (78).. 1.0 2.7 x 8.0 x 10- 2.2 x 2.5 x 10\3\ 6.8 x 10\4\
10\1\ 1 10\1\Pt-191....................... ............... 4.0 1.1 x 3.0 8.1 x 8.7 x 10\3\ 2.4 x 10\5\
10\2\ 10\1\Pt-193....................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 1.4 3.7 x 10\1\
10\1\ 10\3\ 10\1\ 10\3\Pt-193m...................... ............... 4.0 x 1.1 x 5.0 x 10- 1.4 x 5.8 x 10\3\ 1.6 x 10\5\
10\1\ 10\3\ 1 10\1\Pt-195m...................... ............... 1.0 x 2.7 x 5.0 x 10- 1.4 x 6.2 x 10\3\ 1.7 x 10\5\
10\1\ 10\2\ 1 10\1\Pt-197....................... ............... 2.0 x 5.4 x 6.0 x 10- 1.6 x 3.2 x 10\4\ 8.7 x 10\5\
10\1\ 10\2\ 1 10\1\Pt-197m...................... ............... 1.0 x 2.7 x 6.0 x 10- 1.6 x 3.7 x 10\5\ 1.0 x 10\7\
10\1\ 10\2\ 1 10\1\Pu-236....................... Plutonium (94). 3.0 x 8.1 x 3.0 x 10- 8.1 x 10- 2.0 x 10\1\ 5.3 x 10\2\
10\1\ 10\2\ 3 2Pu-237....................... ............... 2.0 x 5.4 x 2.0 x 5.4 x 4.5 x 10\2\ 1.2 x 10\4\
10\1\ 10\2\ 10\1\ 10\2\Pu-238....................... ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 6.3 x 10-1 1.7 x 10\1\
10\1\ 10\2\ 3 2
Pu-239....................... ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 2.3 x 10-3 6.2 x 10-2
10\1\ 10\2\ 3 2Pu-240....................... ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 8.4 x 10-3 2.3 x 10-1
10\1\ 10\2\ 3 2Pu-241 (a)................... ............... 4.0 x 1.1 x 6.0 x 10- 1.6 3.8 1.0 x 10\2\
10\1\ 10\3\ 2Pu-242....................... ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 1.5 x 10-4 3.9 x 10-3
10\1\ 10\2\ 3 2Pu-244 (a)................... ............... 4.0 x 10- 1.1 x 1.0 x 10- 2.7 x 10- 6.7 x 10-7 1.8 x 10-5
1 10\1\ 3 2Ra-223 (a)................... Radium (88).... 4.0 x 10- 1.1 x 7.0 x 10- 1.9 x 10- 1.9 x 10\3\ 5.1 x 10\4\
1 10\1\ 3 1Ra-224 (a)................... ............... 4.0 x 10- 1.1 x 2.0 x 10- 5.4 x 10- 5.9 x 10\3\ 1.6 x 10\5\
1 10\1\ 2 1Ra-225 (a)................... ............... 2.0 x 10- 5.4 4.0 x 10- 1.1 x 10- 1.5 x 10\3\ 3.9 x 10\4\
1 3 1Ra-226 (a)................... ............... 2.0 x 10- 5.4 3.0 x 10- 8.1 x 10- 3.7 x 10-2 1.0
1 3 2Ra-228 (a)................... ............... 6.0 x 10- 1.6 x 2.0 x 10- 5.4 x 10- 1.0 x 10\1\ 2.7 x 10\2\
1 10\1\ 2 1Rb-81........................ Rubidium (37).. 2.0 5.4 x 8.0 x 10- 2.2 x 3.1 x 10\5\ 8.4 x 10\6\
10\1\ 1 10\1\Rb-83 (a).................... ............... 2.0 5.4 x 2.0 5.4 x 6.8 x 10\2\ 1.8 x 10\4\
10\1\ 10\1\Rb-84........................ ............... 1.0 2.7 x 1.0 2.7 x 1.8 x 10\3\ 4.7 x 10\4\
10\1\ 10\1\Rb-86........................ ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 3.0 x 10\3\ 8.1 x 10\4\
1 10\1\ 1 10\1\Rb-87........................ ............... Unlimite Unlimite Unlimite Unlimite 3.2 x 10-9 8.6 x 10-8
d d d dRb(nat)...................... ............... Unlimite Unlimite Unlimite Unlimite 6.7 x 10\6\ 1.8 x 10\8\
d d d dRe-184....................... Rhenium (75)... 1.0 2.7 x 1.0 2.7 x 6.9 x 10\2\ 1.9 x 10\4\
10\1\ 10\1\Re-184m...................... ............... 3.0 8.1 x 1.0 2.7 x 1.6 x 10\2\ 4.3 x 10\3\
10\1\ 10\1\Re-186....................... ............... 2.0 5.4 x 6.0 x 10- 1.6 x 6.9 x 10\3\ 1.9 x 10\5\
10\1\ 1 10\1\Re-187....................... ............... Unlimite Unlimite Unlimite Unlimite 1.4 x 10-9 3.8 x 10-8
d d d dRe-188....................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 3.6 x 10\4\ 9.8 x 10\5\
1 10\1\ 1 10\1\Re-189 (a)................... ............... 3.0 8.1 x 6.0 x 10- 1.6 x 2.5 x 10\4\ 6.8 x 10\5\
10\1\ 1 10\1\Re(nat)...................... ............... Unlimite Unlimite Unlimite Unlimite 0.0 2.4 x 10-8
d d d dRh-99........................ Rhodium (45)... 2.0 5.4 x 2.0 5.4 x 3.0 x 10\3\ 8.2 x 10\4\
10\1\ 10\1\Rh-101....................... ............... 4.0 1.1 x 3.0 8.1 x 4.1 x 10\1\ 1.1 x 10\3\
10\2\ 10\1\Rh-102....................... ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 4.5 x 10\1\ 1.2 x 10\3\
1 10\1\ 1 10\1\Rh-102m...................... ............... 2.0 5.4 x 2.0 5.4 x 2.3 x 10\2\ 6.2 x 10\3\
10\1\ 10\1\Rh-103m...................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 1.2 x 10\6\ 3.3 x 10\7\
10\1\ 10\3\ 10\1\ 10\3\Rh-105....................... ............... 1.0 x 2.7 x 8.0 x 10- 2.2 x 3.1 x 10\4\ 8.4 x 10\5\
10\1\ 10\2\ 1 10\1\Rn-222 (a)................... Radon (86)..... 3.0 x 10- 8.1 4.0 x 10- 1.1 x 10- 5.7 x 10\3\ 1.5 x 10\5\
1 3 1Ru-97........................ Ruthenium (44). 5.0 1.4 x 5.0 1.4 x 1.7 x 10\4\ 4.6 x 10\5\
10\2\ 10\2\Ru-103 (a)................... ............... 2.0 5.4 x 2.0 5.4 x 1.2 x 10\3\ 3.2 x 10\4\
10\1\ 10\1\Ru-105....................... ............... 1.0 2.7 x 6.0 x 10- 1.6 x 2.5 x 10\5\ 6.7 x 10\6\
10\1\ 1 10\1\Ru-106 (a)................... ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 1.2 x 10\2\ 3.3 x 10\3\
1 1S-35......................... Sulphur (16)... 4.0 x 1.1 x 3.0 8.1 x 1.6 x 10\3\ 4.3 x 10\4\
10\1\ 10\3\ 10\1\Sb-122....................... Antimony (51).. 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 1.5 x 10\4\ 4.0 x 10\5\
1 10\1\ 1 10\1\Sb-124....................... ............... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 6.5 x 10\2\ 1.7 x 10\4\
1 10\1\ 1 10\1\Sb-125....................... ............... 2.0 5.4 x 1.0 2.7 x 3.9 x 10\1\ 1.0 x 10\3\
10\1\ 10\1\Sb-126....................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 3.1 x 10\3\ 8.4 x 10\4\
1 10\1\ 1 10\1\Sc-44........................ Scandium (21).. 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 6.7 x 10\5\ 1.8 x 10\7\
1 10\1\ 1 10\1\Sc-46........................ ............... 5.0 x 10- 1.4 x 5.0 x 10- 1.4 x 1.3 x 10\3\ 3.4 x 10\4\
1 10\1\ 1 10\1\Sc-47........................ ............... 1.0 x 2.7 x 7.0 x 10- 1.9 x 3.1 x 10\4\ 8.3 x 10\5\
10\1\ 10\2\ 1 10\1\Sc-48........................ ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 5.5 x 10\4\ 1.5 x 10\6\
1 1Se-75........................ Selenium (34).. 3.0 8.1 x 3.0 8.1 x 5.4 x 10\2\ 1.5 x 10\4\
10\1\ 10\1\Se-79........................ ............... 4.0 x 1.1 x 2.0 5.4 x 2.6 x 10-3 7.0 x 10-2
10\1\ 10\3\ 10\1\
Si-31........................ Silicon (14)... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 1.4 x 10\6\ 3.9 x 10\7\
1 10\1\ 1 10\1\Si-32........................ ............... 4.0 x 1.1 x 5.0 x 10- 1.4 x 3.9 1.1 x 10\2\
10\1\ 10\3\ 1 10\1\Sm-145....................... Samarium (62).. 1.0 x 2.7 x 1.0 x 2.7 x 9.8 x 10\1\ 2.6 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Sm-147....................... Unlimite Unlimite Unlimite Unlimite 8.5 x 10- 2.3 x 10-
d d d d \10\ \8\Sm-151....................... ............... 4.0 x 1.1 x 1.0 x 2.7 x 9.7 x 10-1 2.6 x 10\1\
10\1\ 10\3\ 10\1\ 10\2\Sm-153....................... ............... 9.0 2.4 x 6.0 x 10- 1.6 x 1.6 x 10\4\ 4.4 x 10\5\
10\2\ 1 10\1\Sn-113 (a)................... Tin (50)....... 4.0 1.1 x 2.0 5.4 x 3.7 x 10\2\ 1.0 x 10\4\
10\2\ 10\1\Sn-117m...................... ............... 7.0 1.9 x 4.0 x 10- 1.1 x 3.0 x 10\3\ 8.2 x 10\4\
10\2\ 1 10\1\Sn-119m...................... ............... 4.0 x 1.1 x 3.0 x 8.1 x 1.4 x 10\2\ 3.7 x 10\3\
10\1\ 10\3\ 10\1\ 10\2\Sn-121m (a).................. ............... 4.0 x 1.1 x 9.0 x 10- 2.4 x 2.0 5.4 x 10\1\
10\1\ 10\3\ 1 10\1\Sn-123....................... ............... 8.0 x 10- 2.2 x 6.0 x 10- 1.6 x 3.0 x 10\2\ 8.2 x 10\3\
1 10\1\ 1 10\1\Sn-125....................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 4.0 x 10\3\ 1.1 x 10\5\
1 10\1\ 1 10\1\Sn-126 (a)................... ............... 6.0 x 10- 1.6 x 4.0 x 10- 1.1 x 1.0 x 10-3 2.8 x 10-2
1 10\1\ 1 10\1\Sr-82 (a).................... Strontium (38). 2.0 x 10- 5.4 2.0 x 10- 5.4 2.3 x 10\3\ 6.2 x 10\4\
1 1Sr-85........................ ............... 2.0 5.4 x 2.0 5.4 x 8.8 x 10\2\ 2.4 x 10\4\
10\1\ 10\1\Sr-85m....................... ............... 5.0 1.4 x 5.0 1.4 x 1.2 x 10\6\ 3.3 x 10\7\
10\2\ 10\2\Sr-87m....................... ............... 3.0 8.1 x 3.0 8.1 x 4.8 x 10\5\ 1.3 x 10\7\
10\1\ 10\1\Sr-89........................ ............... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 1.1 x 10\3\ 2.9 x 10\4\
1 10\1\ 1 10\1\Sr-90 (a).................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 5.1 1.4 x 10\2\
1 1Sr-91 (a).................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.3 x 10\5\ 3.6 x 10\6\
1 1Sr-92 (a).................... ............... 1.0 2.7 x 3.0 x 10- 8.1 4.7 x 10\5\ 1.3 x 10\7\
10\1\ 1T(H-3)....................... Tritium (1).... 4.0 x 1.1 x 4.0 x 1.1 x 3.6 x 10\2\ 9.7 x 10\3\
10\1\ 10\3\ 10\1\ 10\3\Ta-178 (long-lived).......... Tantalum (73).. 1.0 2.7 x 8.0 x 10- 2.2 x 4.2 x 10\6\ 1.1 x 10\8\
10\1\ 1 10\1\Ta-179....................... ............... 3.0 x 8.1 x 3.0 x 8.1 x 4.1 x 10\1\ 1.1 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\Ta-182....................... ............... 9.0 x 10- 2.4 x 5.0 x 10- 1.4 x 2.3 x 10\2\ 6.2 x 10\3\
1 10\1\ 1 10\1\Tb-157....................... Terbium (65)... 4.0 x 1.1 x 4.0 x 1.1 x 5.6 x 10-1 1.5 x 10\1\
10\1\ 10\3\ 10\1\ 10\3\Tb-158....................... ............... 1.0 2.7 x 1.0 2.7 x 5.6 x 10-1 1.5 x 10\1\
10\1\ 10\1\Tb-160....................... ............... 1.0 2.7 x 6.0 x 10- 1.6 x 4.2 x 10\2\ 1.1 x 10\4\
10\1\ 1 10\1\Tc-95m (a)................... Technetium (43) 2.0 5.4 x 2.0 5.4 x 8.3 x 10\2\ 2.2 x 10\4\
10\1\ 10\1\Tc-96........................ ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 1.2 x 10\4\ 3.2 x 10\5\
1 10\1\ 1 10\1\Tc-96m (a)................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 1.4 x 10\6\ 3.8 x 10\7\
1 10\1\ 1 10\1\Tc-97........................ ............... Unlimite Unlimite Unlimite Unlimite 5.2 x 10-5 1.4 x 10-3
d d d dTc-97m....................... ............... 4.0 x 1.1 x 1.0 2.7 x 5.6 x 10\2\ 1.5 x 10\4\
10\1\ 10\3\ 10\1\Tc-98........................ ............... 8.0 x 10- 2.2 x 7.0 x 10- 1.9 x 3.2 x 10-5 8.7 x 10-4
1 10\1\ 1 10\1\Tc-99........................ ............... 4.0 x 1.1 x 9.0 x 10- 2.4 x 6.3 x 10-4 1.7 x 10-2
10\1\ 10\3\ 1 10\1\Tc-99m....................... ............... 1.0 x 2.7 x 4.0 1.1 x 1.9 x 10\5\ 5.3 x 10\6\
10\1\ 10\2\ 10\2\Te-121....................... Tellurium (52). 2.0 5.4 x 2.0 5.4 x 2.4 x 10\3\ 6.4 x 10\4\
10\1\ 10\1\Te-121m...................... ............... 5.0 1.4 x 3.0 8.1 x 2.6 x 10\2\ 7.0 x 10\3\
10\2\ 10\1\Te-123m...................... ............... 8.0 2.2 x 1.0 2.7 x 3.3 x 10\2\ 8.9 x 10\3\
10\2\ 10\1\Te-125m...................... ............... 2.0 x 5.4 x 9.0 x 10- 2.4 x 6.7 x 10\2\ 1.8 x 10\4\
10\1\ 10\2\ 1 10\1\Te-127....................... ............... 2.0 x 5.4 x 7.0 x 10- 1.9 x 9.8 x 10\4\ 2.6 x 10\6\
10\1\ 10\2\ 1 10\1\Te-127m (a).................. ............... 2.0 x 5.4 x 5.0 x 10- 1.4 x 3.5 x 10\2\ 9.4 x 10\3\
10\1\ 10\2\ 1 10\1\Te-129....................... ............... 7.0 x 10- 1.9 x 6.0 x 10- 1.6 x 7.7 x 10\5\ 2.1 x 10\7\
1 10\1\ 1 10\1\Te-129m (a).................. ............... 8.0 x 10- 2.2 x 4.0 x 10- 1.1 x 1.1 x 10\3\ 3.0 x 10\4\
1 10\1\ 1 10\1\Te-131m (a).................. ............... 7.0 x 10- 1.9 x 5.0 x 10- 1.4 x 3.0 x 10\4\ 8.0 x 10\5\
1 10\1\ 1 10\1\Te-132 (a)................... ............... 5.0 x 10- 1.4 x 4.0 x 10- 1.1 x 1.1 x 10\4\ 3.0 x 10\5\
1 10\1\ 1 10\1\
Th-227....................... Thorium (90)... 1.0 x 2.7 x 5.0 x 10- 1.4 x 10- 1.1 x 10\3\ 3.1 x 10\4\
10\1\ 10\2\ 3 1Th-228 (a)................... ............... 5.0 x 10- 1.4 x 1.0 x 10- 2.7 x 10- 3.0 x 10\1\ 8.2 x 10\2\
1 10\1\ 3 2Th-229....................... ............... 5.0 1.4 x 5.0 x 10- 1.4 x 10- 7.9 x 10-3 2.1 x 10-1
10\2\ 4 2Th-230....................... ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 7.6 x 10-4 2.1 x 10-2
10\1\ 10\2\ 3 2Th-231....................... ............... 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 2.0 x 10\4\ 5.3 x 10\5\
10\1\ 10\3\ 2 1Th-232....................... ............... Unlimite Unlimite Unlimite Unlimite 4.0 x 10-9 1.1 x 10-7
d d d dTh-234 (a)................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 8.6 x 10\2\ 2.3 x 10\4\
1 1Th(nat)...................... ............... Unlimite Unlimite Unlimite Unlimite 8.1 x 10-9 2.2 x 10-7
d d d dTi-44 (a).................... Titanium (22).. 5.0 x 10- 1.4 x 4.0 x 10- 1.1 x 6.4 1.7 x 10\2\
1 10\1\ 1 10\1\Tl-200....................... Thallium (81).. 9.0 x 10- 2.4 x 9.0 x 10- 2.4 x 2.2 x 10\4\ 6.0 x 10\5\
1 10\1\ 1 10\1\Tl-201....................... ............... 1.0 x 2.7 x 4.0 1.1 x 7.9 x 10\3\ 2.1 x 10\5\
10\1\ 10\2\ 10\2\Tl-202....................... ............... 2.0 5.4 x 2.0 5.4 x 2.0 x 10\3\ 5.3 x 10\4\
10\1\ 10\1\Tl-204....................... ............... 1.0 x 2.7 x 7.0 x 10- 1.9 x 1.7 x 10\1\ 4.6 x 10\2\
10\1\ 10\2\ 1 10\1\Tm-167....................... Thulium (69)... 7.0 1.9 x 8.0 x 10- 2.2 x 3.1 x 10\3\ 8.5 x 10\4\
10\2\ 1 10\1\Tm-170....................... ............... 3.0 8.1 x 6.0 x 10- 1.6 x 2.2 x 10\2\ 6.0 x 10\3\
10\1\ 1 10\1\Tm-171....................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 4.0 x 10\1\ 1.1 x 10\3\
10\1\ 10\3\ 10\1\ 10\3\U-230 (fast lung absorption) Uranium (92)... 4.0 x 1.1 x 1.0 x 10- 2.7 1.0 x 10\3\ 2.7 x 10\4\
(a)(d). 10\1\ 10\3\ 1U-230 (medium lung ............... 4.0 x 1.1 x 4.0 x 10- 1.1 x 10- 1.0 x 10\3\ 2.7 x 10\4\
absorption) (a)(e). 10\1\ 10\3\ 3 1U-230 (slow lung absorption) ............... 3.0 x 8.1 x 3.0 x 10- 8.1 x 10- 1.0 x 10\3\ 2.7 x 10\4\
(a)(f). 10\1\ 10\2\ 3 2U-232 (fast lung absorption) ............... 4.0 x 1.1 x 1.0 x 10- 2.7 x 10- 8.3 x 10-1 2.2 x 10\1\
(d). 10\1\ 10\3\ 2 1U-232 (medium lung ............... 4.0 x 1.1 x 7.0 x 10- 1.9 x 10- 8.3 x 10-1 2.2 x 10\1\
absorption) (e). 10\1\ 10\3\ 3 1U-232 (slow lung absorption) ............... 1.0 x 2.7 x 1.0 x 10- 2.7 x 10- 8.3 x 10-1 2.2 x 10\1\
(f). 10\1\ 10\2\ 3 2U-233 (fast lung absorption) ............... 4.0 x 1.1 x 9.0 x 10- 2.4 3.6 x 10-4 9.7 x 10-3
(d). 10\1\ 10\3\ 2U-233 (medium lung ............... 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 3.6 x 10-4 9.7 x 10-3
absorption) (e). 10\1\ 10\3\ 2 1U-233 (slow lung absorption) ............... 4.0 x 1.1 x 6.0 x 10- 1.6 x 10- 3.6 x 10-4 9.7 x 10-3
(f). 10\1\ 10\3\ 3 1U-234 (fast lung absorption) ............... 4.0 x 1.1 x 9.0 x 10- 2.4 2.3 x 10-4 6.2 x 10-3
(d). 10\1\ 10\3\ 2U-234 (medium lung ............... 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 2.3 x 10-4 6.2 x 10-3
absorption) (e). 10\1\ 10\3\ 2 1U-234 (slow lung absorption) ............... 4.0 x 1.1 x 6.0 x 10- 1.6 x 10- 2.3 x 10-4 6.2 x 10-3
(f). 10\1\ 10\3\ 3 1U-235 (all lung absorption ............... Unlimite Unlimite Unlimite Unlimite 8.0 x 10-8 2.2 x 10-6
types) (a),(d),(e),(f). d d d dU-236 (fast lung absorption) ............... Unlimite Unlimite Unlimite Unlimite 2.4 x 10-6 6.5 x 10-5
(d). d d d dU-236 (medium lung ............... 4.0 x 1.1 x 2.0 x 10- 5.4 x 10- 2.4 x 10-6 6.5 x 10-5
absorption) (e). 10\1\ 10\3\ 2 1U-236 (slow lung absorption) ............... 4.0 x 1.1 x 6.0 x 10- 1.6 x 10- 2.4 x 10-6 6.5 x 10-5
(f). 10\1\ 10\3\ 3 1U-238 (all lung absorption ............... Unlimite Unlimite Unlimite Unlimite 1.2 x 10-8 3.4 x 10-7
types) (d),(e),(f). d d d dU (nat)...................... ............... Unlimite Unlimite Unlimite Unlimite 2.6 x 10-8 7.1 x 10-7
d d d dU (enriched to 20% or ............... Unlimite Unlimite Unlimite Unlimite see Sec. see Sec.
less)(g). d d d d 173.434 173.434U (dep)...................... ............... Unlimite Unlimite Unlimite Unlimite see Sec. see Sec.
d d d d 173.434 173.434V-48......................... Vanadium (23).. 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 6.3 x 10\3\ 1.7 x 10\5\
1 10\1\ 1 10\1\V-49......................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 3.0 x 10\2\ 8.1 x 10\3\
10\1\ 10\3\ 10\1\ 10\3\W-178 (a).................... Tungsten (74).. 9.0 2.4 x 5.0 1.4 x 1.3 x 10\3\ 3.4 x 10\4\
10\2\ 10\2\W-181........................ ............... 3.0 x 8.1 x 3.0 x 8.1 x 2.2 x 10\2\ 6.0 x 10\3\
10\1\ 10\2\ 10\1\ 10\2\
W-185........................ ............... 4.0 x 1.1 x 8.0 x 10- 2.2 x 3.5 x 10\2\ 9.4 x 10\3\
10\1\ 10\3\ 1 10\1\W-187........................ ............... 2.0 5.4 x 6.0 x 10- 1.6 x 2.6 x 10\4\ 7.0 x 10\5\
10\1\ 1 10\1\W-188 (a).................... ............... 4.0 x 10- 1.1 x 3.0 x 10- 8.1 3.7 x 10\2\ 1.0 x 10\4\
1 10\1\ 1Xe-122 (a)................... Xenon (54)..... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 4.8 x 10\4\ 1.3 x 10\6\
1 10\1\ 1 10\1\Xe-123....................... ............... 2.0 5.4 x 7.0 x 10- 1.9 x 4.4 x 10\5\ 1.2 x 10\7\
10\1\ 1 10\1\Xe-127....................... ............... 4.0 1.1 x 2.0 5.4 x 1.0 x 10\3\ 2.8 x 10\4\
10\2\ 10\1\Xe-131m...................... ............... 4.0 x 1.1 x 4.0 x 1.1 x 3.1 x 10\3\ 8.4 x 10\4\
10\1\ 10\3\ 10\1\ 10\3\Xe-133....................... ............... 2.0 x 5.4 x 1.0 x 2.7 x 6.9 x 10\3\ 1.9 x 10\5\
10\1\ 10\2\ 10\1\ 10\2\Xe-135....................... ............... 3.0 8.1 x 2.0 5.4 x 9.5 x 10\4\ 2.6 x 10\6\
10\1\ 10\1\Y-87 (a)..................... Yttrium (39)... 1.0 2.7 x 1.0 2.7 x 1.7 x 10\4\ 4.5 x 10\5\
10\1\ 10\1\Y-88......................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 5.2 x 10\2\ 1.4 x 10\4\
1 10\1\ 1 10\1\Y-90......................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 2.0 x 10\4\ 5.4 x 10\5\
1 1Y-91......................... ............... 6.0 x 10- 1.6 x 6.0 x 10- 1.6 x 9.1 x 10\2\ 2.5 x 10\4\
1 10\1\ 1 10\1\Y-91m........................ ............... 2.0 5.4 x 2.0 5.4 x 1.5 x 10\6\ 4.2 x 10\7\
10\1\ 10\1\Y-92......................... ............... 2.0 x 10- 5.4 2.0 x 10- 5.4 3.6 x 10\5\ 9.6 x 10\6\
1 1Y-93......................... ............... 3.0 x 10- 8.1 3.0 x 10- 8.1 1.2 x 10\5\ 3.3 x 10\6\
1 1Yb-169....................... Ytterbium (70). 4.0 1.1 x 1.0 2.7 x 8.9 x 10\2\ 2.4 x 10\4\
10\2\ 10\1\Yb-175....................... ............... 3.0 x 8.1 x 9.0 x 10- 2.4 x 6.6 x 10\3\ 1.8 x 10\5\
10\1\ 10\2\ 1 10\1\Zn-65........................ Zinc (30)...... 2.0 5.4 x 2.0 5.4 x 3.0 x 10\2\ 8.2 x 10\3\
10\1\ 10\1\Zn-69........................ ............... 3.0 8.1 x 6.0 x 10- 1.6 x 1.8 x 10\6\ 4.9 x 10\7\
10\1\ 1 10\1\Zn-69m (a)................... ............... 3.0 8.1 x 6.0 x 10- 1.6 x 1.2 x 10\5\ 3.3 x 10\6\
10\1\ 1 10\1\Zr-88........................ Zirconium (40). 3.0 8.1 x 3.0 8.1 x 6.6 x 10\2\ 1.8 x 10\4\
10\1\ 10\1\Zr-93........................ ............... Unlimite Unlimite Unlimite Unlimite 9.3 x 10-5 2.5 x 10-3
d d d dZr-95 (a).................... ............... 2.0 5.4 x 8.0 x 10- 2.2 x 7.9 x 10\2\ 2.1 x 10\4\
10\1\ 1 10\1\Zr-97 (a).................... ............... 4.0 x 10- 1.1 x 4.0 x 10- 1.1 x 7.1 x 10\4\ 1.9 x 10\6\
1 10\1\ 1 10\1\----------------------------------------------------------------------------------------------------------------\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 Sec. 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 Sec. 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, UO2F2 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. [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]