| 单词 | s-process |
| 释义 | > as lemmass-process 9. [Initial letter of slow.] s-process (Astr.): a process thought to occur in giant stars by which heavy atomic nuclei are produced from other nuclei over a long time scale by a combination of neutron captures and more rapid beta decays. ΘΚΠ the world > the universe > star > star-matter > [noun] > stellar process agglutination1753 nebularizationa1892 fission1919 carbon cycle1940 r-process1956 s-process1956 nucleosynthesis1957 starquake1969 1956 F. Hoyle et al. in Science 5 Oct. 612/2 We have distinguished two conditions under which the Neutron capture can take place, a slow (s) process and a rapid (*r) process... The r-process we associate with the explosion of supernovae, the time scale being as small as 10 to 100 seconds. 1971 New Scientist 27 Apr. 248/2 The solar-system proportions of many heavy elements reflect the results expected from the s-process, but the lighter elements defy quantitative explanation. 1977 J. Narlikar Struct. Universe ii. 49 Whereas the s-process produces proton-rich nuclei, the r-process produces neutron-rich nuclei. < as lemmas |
| 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。