SHAPE COEXISTENCE AND SUPERDEFORMATION IN 28Si

被引：0
|
作者：
Frycz, D. [1 ]
Menendez, J. [1 ,2 ]
Thoa, A. [1 ,2 ]
Romero, A. M. [1 ,2 ]
机构：
[1] Univ Barcelona, Dept Fis Quant & Astrofis, Barcelona, Spain
[2] Univ Barcelona, Inst Ciencies Cosmos, Barcelona, Spain
来源：
ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT | 2024年 / 17卷 / 03期
关键词：
SHELL-MODEL; STATES;
D O I：
10.5506/APhysPolBSupp.17.3-A2
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study shape coexistence of differently deformed states within Si-28 using shell-model and beyond-mean-field techniques. Experimentally, Si-28 exhibits shape coexistence between an oblate ground state and an excited prolate structure. The oblate rotational band is described well within the sd shell using the USDB interaction. However, for the prolate band, a modification of this interaction is required, lowering the single-particle energy of the 1d(3/2) orbital. Furthermore, we explore the possibility of a superdeformed configuration in Si-28. Our calculations, spanning both the sd and pf shells, disfavour the existence of a superdeformed 0(+) bandhead within an excitation energy range of 10-20 MeV.
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页数：6
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