Open Access
Table 5
Abundances of seven delayed neutron precursors for two uranium isotopes.
| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Precursor | 87Br | 137I | 88Br | 93Rb | 139I | 91Br | 96Rb |
| Half-life (s) | 55.9 | 24.5 | 16.4 | 5.85 | 2.3 | 0.54 | 0.199 |
| Abundances | |||||||
| 233U (fast) | 0.0788 | 0.1666 | 0.1153 | 0.1985 | 0.3522 | 0.0633 | 0.0253 |
| 233U (thermal) | 0.0787 | 0.1723 | 0.1355 | 0.1884 | 0.3435 | 0.0605 | 0.0211 |
| 235U (fast) | 0.0339 | 0.1458 | 0.0847 | 0.1665 | 0.4069 | 0.1278 | 0.0344 |
| 235U (thermal) | 0.0321 | 0.1616 | 0.0752 | 0.1815 | 0.3969 | 0.1257 | 0.0270 |
| Mean value | 0.0742 | 0.1679 | 0.1209 | 0.1915 | 0.3533 | 0.0684 | 0.0240 |
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