请输入您要查询的英文单词:

 

单词 nucleosynthesis
释义

nucleosynthesisn.

Brit. /ˌnjuːklɪə(ʊ)ˈsɪnθᵻsɪs/, U.S. /ˈˌn(j)uklioʊˈsɪnθəsəs/
Origin: Formed within English, by compounding. Etymons: nucleo- comb. form, synthesis n.
Etymology: < nucleo- comb. form + synthesis n. Compare slightly earlier nucleogenesis n.
Astronomy.
The formation of atomic nuclei more complex than the hydrogen nucleus, occurring by various processes in the universe.
ΘΚΠ
the world > the universe > star > star-matter > [noun] > stellar process
agglutination1753
nebularizationa1892
fission1919
carbon cycle1940
r-process1956
s-process1956
nucleosynthesis1957
starquake1969
1957 W. A. Fowler in Sci. Monthly 84 91/2 This description of nucleosynthesis in stars starts from the well-established facts that the source of energy in stars is reactions among nuclei and that nuclear reactions which release energy must involve the transmutation of nuclei of low stability into nuclei of great stability.
1960 W. A. Fowler & F. Hoyle in Ann. Physics 10 281 Type I supernovae were considered to be the only events rapid enough for nucleosynthesis. [Note] We use the term nucleosynthesis rather than nucleogenesis for good reason. We refer..to the synthesis of the elements beyond hydrogen from..the proton, and the neutron... We reserve genesis for the creation of matter-energy.
1971 Nature 3 Sept. 39/2 It is now clear that while this effect is operating, a large amount of nucleosynthesis takes place early in the life of a galaxy.
1994 P. Davies Last Three Minutes iv. 45 These elements, along with the lighter ones, such as carbon and oxygen, that were created in the earlier stages of nucleosynthesis, are blasted into space.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
<
n.1957
随便看

 

英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/24 7:36:32