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Nuclear Properties - doe-std-1128-98_ch10019
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Table 2.4. Specific Activity Decay Heats of Selected Isotopes(a) - doe-std-1128-98_ch10021


DOE-STD-1128-98
Table 2.3.
Radioactive Decay Properties of Selected Isotopes and Decay Products, Excluding
Spontaneous Fission (a)
Mode of Energy Yield, X-ray (b)
Isotope
Half-Life
Gamma
Decay
MeV
d%
Energy
Yield
Ray
Yield
Particle
MeV
%
MeV
%
6.6x10-2
0.0476
α
L's 0.011-0.021 13(c)
Pu
2.851 y
5.77
69.3
236
-2
α
5.72
30.6
0.109
1.2x10
-2
0.0425
α
L's 0.011-0.021 15(c)
3.95x10
Pu
87.7 y
5.50
71.0
238
-3
α
5.46
28.8
0.0999
7.35x10
-3
0.099
2.41 x 104 y α
5.0(c)
1.22x10
Pu
5.157
73.1
L's 0.0116-
239
α
5.144
15.0
0.0215
0.129
6.41x10-3
-3
α
5.106
11.8
0.375
1.55x10
0.414
1.46x10-3
0.0452
α
10.8(c)
4.50x10-2
Pu
6564 y
5.168
72.8 L's 0.0115-
240
α
5.124
27.1 0.0215
0.104
7.08x10-3
β
0.0052(d) 100.00 --
Pu
14.35 y
--
0.077
2.20x10-5
241
2.04 x 10 -3
α
4.896
0.1037
1.01x10-4
0.114
6.0x10-6
0.149
1.9x10-4
0.160
6.71x10-5
0.0449
3.73 x 105 y α
9.1(c)
3.6x10-2
Pu
4.901
77.5
L's 0.0116-
242
α
4.857
22.4
0.0215
0.104
7.8x10-3
0.0263
2.4
α
42(c)
Am
432.2 y
5.486
85.2
L's 0.0119-
241
1.2x10-1
α
5.443
12.8
0.0222
0.0332
α
5.388
1.4
0.0595
35.7
0.0263
2.43
β
70(c)
0.8
L's 0.0119-
U
6.75 d
0.039(e)
237
β
3.4
0.0206
0.0595
34.5
0.050(e)
β
51
53
0.0648
1.28
0.065(e)
β
0.069(e)
42
K's 0.097-0.114
0.165
1.85
0.208
21.1
0.268
7.1x10-1
0.332
1.2
0.335
9.5x10-2
0.369
4.0x10-2
0.371
1.1x10-1
(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.
(d)
Average beta energy given. The maximum beta average for 241Pu is 0.0208 MeV.
Average beta energy. The maximum beta energy for 237U is 0.248 MeV.
(e)
2-6


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