Appendix I: Data for Some Common Radioactive Isotopes
|
ELEMENT
|
ATOMIC NUMBER
|
MASS NUMBER
|
HALF-LIFE
|
BETA*, AUGER E(max) MeV
|
GAMMA MeV
|
 R/mCi-hr @ 1 cm |
|
Antimony
|
51
|
124
|
60 d
|
.611
|
.602
|
9.8
|
|
Argon
|
18
|
37
|
35 d
|
.0024
|
.003
|
 |
|
Arsenic
|
33
|
74
|
17.5 d
|
+, .944
|
.595
|
5.1
|
|
Arsenic
|
33
|
76
|
26.8 h
|
2.4, 2.9
|
.559
|
2.1
|
|
Beryllium
|
3
|
7
|
53 d
|
None
|
.477
|
.3
|
|
Bromine
|
35
|
82
|
35.7 d
|
.444
|
.554, .776
|
14.6
|
|
Cadmium
|
48
|
109
|
1.3 v
|
.018
|
.022
|
|
|
Calcium
|
20
|
45
|
164 d
|
.256
|
None
|
|
|
Calcium with scandium 47
|
|
47
|
4.7 d
|
.690, .441
|
1.30, .159
|
5.96
|
|
Carbon
|
6
|
11
|
20.4 m
|
+, .96
|
None
|
6.2
|
|
Carbon
|
6
|
14
|
5730 y
|
.156
|
None
|
|
|
Cerium
|
58
|
141
|
33 d
|
.434
|
.145
|
0.5
|
|
Cesium
|
55
|
134
|
2.06 y
|
.657
|
.604, .795
|
0.5
|
|
Cesium with barium 137m
|
|
137
|
30 y
|
.511
|
.662
|
3.0
|
|
Chlorine
|
17
|
36
|
3E5 y
|
.709
|
None
|
8.64
|
|
Chromium
|
24
|
51
|
27.8 d
|
.00047, .004
|
.005
|
.1
|
|
Cobalt
|
27
|
57
|
270 d
|
.005
|
.122
|
.9
|
|
Cobalt
|
27
|
60
|
5.2 y
|
.317
|
1.17, 1.33
|
12.9
|
|
Gallium
|
31
|
72
|
14.3 h
|
.233, .341
|
.834
|
14.7
|
|
Gold
|
79
|
198
|
2.69 d
|
.960
|
.411
|
2.27
|
|
Gold
|
79
|
199
|
3.15 d
|
.294
|
.158
|
.42
|
|
Hydrogen
|
1
|
3
|
12.26 y
|
.017
|
None
|
|
|
Iodine
|
53
|
125
|
60 d
|
.003 |
.022
|
1.7
|
|
Iodine
|
53
|
131
|
8.1 d
|
.606
|
.364
|
2.20
|
|
Iron
|
26
|
55
|
2.84 y
|
.005
|
.006
|
|
|
Iron
|
26
|
59
|
45 d
|
.273, .465
|
1.1, 1.3
|
6.8
|
|
Krypton
|
36
|
85
|
10.3 y
|
.84
|
.151
|
.02
|
|
Manganese
|
25
|
54
|
320 d
|
.004
|
.835
|
4.7
|
|
Mercury
|
80
|
203
|
46.6 d
|
.212
|
.279
|
1.2
|
|
Molybdenum
|
42
|
99
|
66 h
|
1.214
|
.739
|
1.29
|
|
Nickel
|
28
|
56
|
6.4 d
|
.006
|
.158, .811
|
|
|
Nickel
|
28
|
63
|
125 y
|
.065
|
|
|
|
Niobium
|
41
|
95
|
35 d
|
.159
|
.765
|
4.5
|
|
Phosphorus
|
15
|
32
|
14.3 d
|
1.71
|
|
|
|
Promethium
|
61
|
147
|
2.5 y
|
.224
|
|
|
|
Rubidium
|
37
|
86
|
18.6 d
|
1.77
|
1.07
|
.49
|
|
Scandium
|
21
|
46
|
85 d
|
.357
|
.889, 1.12
|
11.0
|
|
Selenium
|
34
|
75
|
127 d
|
.009
|
.136, .264
|
1.84
|
|
Sodium
|
11
|
22
|
2.6 y
|
+.545
|
1.27
|
11.9
|
|
Sodium
|
11
|
24
|
15 h
|
1.39
|
1.37, 2.75
|
18.7
|
|
Strontium
|
38
|
85
|
65 d
|
.001
|
.151
|
6.5
|
|
Strontium
|
38
|
89
|
54 d
|
1.49
|
|
|
|
Strontium with yttrium 90
|
|
90
|
28 y
|
.546, 2.28
|
|
|
|
Sulfur
|
16
|
35
|
87 d
|
.167
|
|
|
|
Thallium
|
81
|
204
|
4.1 y
|
.763
|
|
|
|
Thallium
|
69
|
170
|
125 d
|
.967
|
.084
|
.01
|
|
Tin with indium 113m
|
50
|
113
|
115 d
|
.363
|
.391
|
3.5
|
|
Vanadium
|
23
|
48
|
16 d
|
+ , .697
|
.983, 1.3
|
10.0
|
|
Xenon
|
54
|
133
|
5.27 d
|
.356
|
.08
|
.44
|
|
Yttrium
|
39
|
91
|
58 d
|
1.54
|
1.2
|
.21
|
|
Zinc
|
30
|
65
|
245 d
|
.007
|
1.11
|
2.9
|
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