| 单词 | slow neutron |
| 释义 | > as lemmasslow neutron slow neutron n. Nuclear Physics a neutron with relatively little kinetic energy, esp. as a result of being slowed down by a moderator; a thermal neutron.Cf. sense 21. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > nuclear reactor > [noun] > thermal or slow reactor > neutron with low energy slow neutron1932 1932 Nature 9 July 57/2 (heading) Concentration of slow neutrons in the atmosphere. 1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) x. 112 These slow neutrons are produced by allowing fast neutrons, such as those emitted by a radon-beryllium source, to pass through water, paraffin wax, or other substances containing hydrogen. 1949 Atomics Sept. 45/2 The so-called ‘slow neutron reactor’. These reactors take advantage of the fact that neutrons produce fission in uranium more easily as they go slower. 2011 M. Irvine Nucl. Power: Very Short Introd. ii. 28 Natural uranium..will not go critical at any mass without a moderator to increase the number of slow neutrons which are the dominant fission triggers. < as lemmas |
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