英语词汇“critical size”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

critical size n. Nuclear Physics (of a particular reactor core, body of fissile material, bomb, etc.) the minimum characteristic dimensions or mass at which it becomes capable of sustaining a chain reaction; cf. critical mass n.

ΘΚΠ

the world > matter > physics > atomic nucleus > nuclear fission > [noun] > minimum of fissile material

critical size1940

critical mass1941

crit1957

1940 O. R. Frisch & R. E. Peierls in M. Gowing Brit. & Atomic Energy 1939–45 (1964) App. i. 391 For a sphere well above the critical size the loss through neutron escape would be small.

1946 E. S. C. Smith et al. Appl. Atomic Power iii. i. 74 The critical size of the bomb had been shown to be almost certainly within practical limits.

1968 G. P. Lahti et al. Preliminary Considerations Fast-spectrum, Liquid-metal Cooled Nucl. Reactor Program Space-power Applic. 31 Under the same conditions the critical size of a uranium²³³ nitride reactor is 8.6 inches (21.8 cm) compared with the 10.5 inches (26.7 cm) required for uranium²³³ dioxide fuel.

2002 N.Y. Rev. Bks. 7 Nov. 70/2 The critical mass..is determined by a competition between escape of neutrons from the surface of the fissionable material and the creation of neutrons in the interior during the fission process. When this competition is a ‘draw’—as many neutrons are created as escape—you have reached the critical size.

单词	critical size
释义	> as lemmas critical size critical size n. Nuclear Physics (of a particular reactor core, body of fissile material, bomb, etc.) the minimum characteristic dimensions or mass at which it becomes capable of sustaining a chain reaction; cf. critical mass n. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > [noun] > minimum of fissile material critical size1940 critical mass1941 crit1957 1940 O. R. Frisch & R. E. Peierls in M. Gowing Brit. & Atomic Energy 1939–45 (1964) App. i. 391 For a sphere well above the critical size the loss through neutron escape would be small. 1946 E. S. C. Smith et al. Appl. Atomic Power iii. i. 74 The critical size of the bomb had been shown to be almost certainly within practical limits. 1968 G. P. Lahti et al. Preliminary Considerations Fast-spectrum, Liquid-metal Cooled Nucl. Reactor Program Space-power Applic. 31 Under the same conditions the critical size of a uranium²³³ nitride reactor is 8.6 inches (21.8 cm) compared with the 10.5 inches (26.7 cm) required for uranium²³³ dioxide fuel. 2002 N.Y. Rev. Bks. 7 Nov. 70/2 The critical mass..is determined by a competition between escape of neutrons from the surface of the fissionable material and the creation of neutrons in the interior during the fission process. When this competition is a ‘draw’—as many neutrons are created as escape—you have reached the critical size. extracted from criticaladj.n. < as lemmas
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