§ 173.435
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]