Open Access
Table 1
The recommended data set of the 8-group DN parameters for fission of 240Pu by fast neutrons expanded from the 6-group model (the LANL expansion method [3]).
| The LANL expansion method. Pu-240_fast: Fast Spectrum, 8-groups DN parameters, Keepin et al. (1957) [7]. | ||||
|---|---|---|---|---|
|
|
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| Gr. No., i |
T(i), Half-lives, s |
a(i), Rel. Abun. |
± | 1 sigma |
| 1 | 55.6 | 0.022 | ± | 0.003 |
| 2 | 24.5 | 0.207 | ± | 0.005 |
| 3 | 16.3 | 0.080 | ± | 0.002 |
| 4 | 5.21 | 0.161 | ± | 0.055 |
| 5 | 2.37 | 0.314 | ± | 0.009 |
| 6 | 1.04 | 0.105 | ± | 0.010 |
| 7 | 0.424 | 0.079 | ± | 0.017 |
| 8 | 0.195 | 0.032 | ± | 0.003 |
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