| 单词 | multiplication factor |
| 释义 | > as lemmasmultiplication factor multiplication factor n. (a) Nuclear Physics the ratio by which the number of neutrons increases during a period equal to the lifetime of a neutron; (b) gen. a factor by which something is (or is to be) multiplied. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > [noun] > neutron ratio reproduction factor1918 multiplication factor1941 multiplication constant1945 reproduction constant1950 1941 E. Fermi Coll. Papers (1965) II. 89 The chain reaction may reach a steady state only when the multiplication factor of the neutrons (including neutron losses due to diffusion outside of the reacting mass) is equal to 1. 1974 Encycl. Brit. Macropædia XIII. 305/1 If a fission bomb is to be made, the multiplication factor must be as large as possible. 1986 Jrnl. Plant Physiol. 124 455 A spontaneous secondary cycle of direct somatic embryogenesis occurred, giving a final embryo multiplication factor of better than 150. 1996 Jrnl. Appl. Entomol. 120 147 For P. cupreus the multiplication factor to transform alcohol weight into fresh weight is 1.19. < as lemmas |
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