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Page Title:
Table 2.3. Radioactive Decay Properties of Selected Isotopes and Decay Products, Excluding Spontaneous Fission(a) |
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| 0032im.jpg) DOE-STD-1128-98
Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities
Table 2.3.
Radioactive Decay Properties of Selected Isotopes and Decay Products, Excluding
Spontaneous Fission(a)
Gamma
(b)
X-ray
Ray
Mode of
Energy,
Yield,
Decay
Energy,
Energy,
Yield,
MeV
%
Particle
MeV
Yield,d%
MeV
%
Isotope
Half-Life
"
236
13
6.6 x 10-2
Pu
2.851 y
5.77
69.3
L's 0.011-0.021
0.0476
"
1.2 x 10-2
5.72
30.6
0.109
"
10.5
3.95 x 10-2
238
Pu
87.7 y
5.50
71.0
L's 0.011-0.021
0.0425
"
7.35 x 10-3
5.46
28.8
0.0999
"
2.41 x 104 y
5.0
1.22 x 10-3
239
Pu
5.157
0.099
73.1
L's 0.0116-
"
6.41 x 10-3
5.144
0.129
15.0
0.0215
"
1.55 x 10-3
5.106
0.375
11.8
1.46 x 10-3
0.414
"
10.8
4.50 x 10-2
240
Pu
6564 y
5.168
72.8
L's 0.0115-
0.0452
"
7.08 x 10-3
5.124
27.1
0.0215
0.104
$
0.0052(d)
2.20 x 10-5
241
100.00
Pu
14.35 y
--
--
0.077
"
2.04 x 10-3
1.01 x 10-4
4.896
0.1037
6.0 x 10-6
0.114
1.9 x 10-4
0.149
6.71 x 10-5
0.160
"
3.73 x 105 y
9.1
3.6 x 10-2
242
Pu
4.901
77.5
L's 0.0116-
0.0449
"
7.8 x 10-3
4.857
22.4
0.0215
0.104
"
42
241
Am
432.2 y
5.486
0.0263
85.2
2.4
L's 0.0119-
"
1.2 x 10-1
5.443
0.0332
12.8
0.0222
"
35.7
5.388
0.0595
1.4
$
237
0.039(e)
70
U
6.75 d
0.8
0.0263
L's 0.0119-
2.43
$
0.050(e)
3.4
0.0595
0.0206
34.5
$
0.065(e)
53
51
0.0648
1.28
$
0.069(e)
42
K's 0.097-0.114
0.165
1.85
0.208
21.1
7.1 x 10-1
0.268
1.2
0.332
9.5 x 10-2
0.335
4.0 x 10-2
0.369
1.1 x 10-1
0.371
(a)
Data from Dunford and Burrows (1993).
(b)
L's = L X-rays; K's = K X-rays.
(c)
Total for all X-rays. The value represents an average obtained from data at Pacific Northwest Laboratory, Lawrence
Berkeley Laboratory, and Lawrence Livermore Laboratory.
Average beta energy given. The maximum beta average for 241Pu is 0.0208 MeV.
(d)
Average beta energy. The maximum beta energy for 237U is 0.248 MeV.
(e)
2-6
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