Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei
Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei
复制标题
通过富中子核中的构型混合研究核心塌陷超新星中的电子捕获
DOI:
10.1088/1742-6596/381/1/012119
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Diget C
中科院分区:
文献类型:
--
作者:
Diget C
Electron capture on neutron-rich medium-mass nuclei is a key process where the electrons that impede the collapse of the core of massive stars are captured, thereby producing very neutron-rich nuclei. As the core collapses, the supernova is then initiated. For the electron capture to proceed, however, the allowed Gamow-Teller (GT) transition must be unblocked either by thermal excitations or by mixing of proton configurations from a higher-lying shell into the ground-state configuration of the nucleus. The present paper presents an experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University, in which we study the configuration mixing in the neutron-rich 76 Zn isotope. The experiment utilised single-proton and single-neutron knockout with detection of reaction-residue γ rays and measurement of the parallel momentum of the residue. Through this we investigate the proton components of the 76 Zn ground state, with a particular interest in π-g 9/2, which may unblock the GT electron capture even at low temperatures and thereby open a new pathway for the initiation of the collapse of the pre-supernova stellar core.
登录
查看更多内容
影响因子:
3.1
作者:
C. Hansen
通讯作者:
C. Hansen
影响因子:
1.4
作者:
BETHE, HA;BROWN, GE;LATTIMER, JM
通讯作者:
LATTIMER, JM
DOI:
10.1103/physrevc.47.537
发表时间:
1993
期刊:
Physical review. C, Nuclear physics
影响因子:
--
作者:
Berz;Joh;Nolen;Sherrill;Zeller
通讯作者:
Zeller
DOI:
10.1016/s0168-9002(01)00257-1
发表时间:
2001
影响因子:
1.4
作者:
W. Mueller;J. Church;T. Glasmacher;D. Gutknecht;G. Hackman;P. Hansen;Z. Hu;K. Miller;P. Quirin
通讯作者:
P. Quirin
DOI:
10.1088/1742-6596/381/1/012007
发表时间:
2012
期刊:
Journal of Physics: Conference Series
影响因子:
--
作者:
J. Tostevin
通讯作者:
J. Tostevin