| 单词 | fast neutron |
| 释义 | > as lemmasfast neutron fast neutron n. Nuclear Physics a neutron with relatively high kinetic energy, esp. one that has not been slowed down by the action of a moderator (moderator n. 9) after being produced by the fission of a nucleus; cf. sense 14. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > nuclear reactor > [noun] > using fast neutrons > fast neutron fast neutron1932 1932 I. Curie & F. Joliot Let. 25 June in Nature 9 July 57/2 The atomic mass of Be9, based on the energy of the fast neutrons (7·8 x 106 ev.), is 9·006. 1956 A. H. Compton Atomic Quest i. 55 It was the fast neutrons coming directly from the atom's fission that would take part in an atomic explosion; in the controlled reaction where a moderator was used, it was the slow neutrons that were most important. 1968 New Scientist 8 Feb. 305/1 Experiments in fast-neutron therapy have so far concentrated mainly on animals. 2016 V. Valković 14 MeV Neutrons vi. 239 Every fast neutron was reduced to thermal energy inside the container or was scattered back into it after being thermalized in the surrounding shielding. < as lemmas |
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