Research Article
Improving Nuclear Safety of Fast Reactors by Slowing Down Fission Chain Reaction
Table 4
Neutron-physical characteristics of different materials.
| Material |
Slowing-down probability (0.1 MeV0.5 eV) | (cm) | (cm) | Neutron lifetime (ms) | Slowing down | Thermal |
| Pbnat | 0.304 | 134 | 30 | 0.56 | 0.8 |
208Pb | 0.993 | 134 | 835 | 0.56 | 598 | D2O | 0.999 | 19 | 360 | 0.01 | 130 | Graphite | 0.998 | 31 | 138 | 0.03 | 13 |
| Radiogenic Pb from different deposits |
| Brazil | 0.930 | 134 | 186 | 0.56 | 29 | Australia | 0.914 | 134 | 142 | 0.56 | 17 | The USA | 0.885 | 134 | 129 | 0.56 | 14 | Ukraine | 0.915 | 134 | 145 | 0.56 | 18 |
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