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Page Title:
Table 6.9. Neutron Yields for Trace Impurities in Plutonium and Uranium |
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|  DOE-STD-1128-98
Average Neutron
Neutron Yield
Neutron Yield
Energy in MeV
Per 106 Alphas
Per 106 Alphas
For 5.3-MeV
Element
at 4.7 MeV (234U)
at 5.2 MeV (234U)
Alphas from Pu
Li
0.16 + 0.04
1.13 + 0.25
0.3
Be
44. + 4
65. + 5
4.2
B
12.4 + 0.6
17.5 + 0.4
2.9
C
0.051 + 0.002
0.078 + 0.004
4.4
O
0.040 + 0.001
0.059 + 0.002
1.9
F
3.1 + 0.3
5.9 + 0.6
1.2
Na
0.5 + 0.5
1.1 + 0.5
Mg
0.42 + 0.03
0.89 + 0.02
2.7
Al
0.13 + 0.01
0.41 + 0.01
1.0
Si
0.0028 + 0.002
0.076 + 0.003
1.2
Cl
0.01 + 0.01
0.07 + 0.04
The quality factors to be used for determining dose equivalent in rem for
neutrons are as follows:
Neutron Energy
Quality Factor
≤ 10 KeV
3
> 10 KeV
10
When the spectral data are sufficient to identify the energy of the
neutrons, the following mean quality factor values may be used:
6-18
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