Particle-hole excitations in the interacting boson model (IV). The U(5)-SU(3) coupling

被引：25

作者：

De Coster, C

Decroix, B

Heyde, K

Jolie, J

Lehmann, H

Wood, JL

机构：

[1] Inst Theoret Phys, Vakgroep Subatom Stralingsfys, B-9000 Ghent, Belgium

[2] Univ Fribourg, Inst Phys, CH-1700 Fribourg, Switzerland

[3] Inst Laue Langevin, F-38042 Grenoble, France

[4] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

NUCLEAR PHYSICS A | 1999年 / 651卷 / 01期

关键词：

particle-hole excitations; I-spin multiplets; U(5)-SU(3) coupling;

D O I：

10.1016/S0375-9474(99)00124-4

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：

In the extended interacting boson model (EIBM) both particle- and hole-like bosons are incorporated to encompass multi-particle-multi-hole excitations at and near to closed shells. We apply the group theoretical concepts of the EIBM to the particular case of two coexisting systems in the same nucleus exhibiting a U(5) (for the regular configurations) and an SU(3) symmetry (for the intruder configurations). Besides the description of "global" symmetry aspects in terms of I-spin, also the very specific local mixing effects characteristic for the U(5)-SU(3) symmetry coupling are studied. The model is applied to the Po isotopes and a comparison with a more realistic calculation is made. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：31 / 55

页数：25

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