Shell structure from 100Sn to 78Ni:: Implications for nuclear astrophysics

被引：24
|
作者：
Grawe, H
Blazhev, A
Górska, M
Mukha, I
Plettner, C
Roeckl, E
Nowacki, F
Grzywacz, R
Sawicka, M
机构：
[1] GSI Darmstadt, D-64291 Darmstadt, Germany
[2] Univ Sofia, BU-1126 Sofia, Bulgaria
[3] Katholieke Univ Leuven, Louvain, Belgium
[4] RRC Kurchatov Inst, RU-123481 Moscow, Russia
[5] Yale Univ, New Haven, CT USA
[6] IReS, Strasbourg 2, France
[7] ORNL, Oak Ridge, TN USA
[8] Warsaw Univ, IEP, Warsaw, Poland
来源：
EUROPEAN PHYSICAL JOURNAL A | 2005年 / 25卷 / Suppl 1期
关键词：
D O I：
10.1140/epjad/i2005-06-025-1
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The single-particle structure and shell gap of Sn-100 is inferred from prompt in-beam and delayed gamma-ray spectroscopy of seniority and spin-gap isomers. Recent results in Ag-94,Ag-65 and Cd-98 stress the importance of large-scale shell model calculations employing realistic interactions for the isomerism, np-nh excitations and E2 polarisation of the Sn-100 core. The strong monopole interaction of the Delta l = 0 spin-flip partners pi g(9/2)-nu g(7/2) in N = 51 isotones below Sn-100 is echoed in the Delta l = 1 pi f(5/2)-nu g(9/2) pair of nucleons, which is decisive for the persistence of the N = 50 shell gap in Ni-78. This is corroborated by recent experimental data on Ni-70,Ni-76, Zn-78. The importance of monopole driven shell evolution for the appearance of new shell closures in neutron-rich nuclei and implications for r-process abundances near the N = 82 shell is discussed.
引用
收藏
页码：357 / 362
页数：6
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