Effective operators from exact many-body renormalization

被引：32

作者：

Lisetskiy, A. F. ^{[1
,2
]}

Kruse, M. K. G. ^{[1
]}

Barrett, B. R. ^{[1
]}

Navratil, P. ^{[3
]}

Stetcu, I. ^{[4
]}

Vary, J. P. ^{[5
]}

机构：

[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[2] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[3] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[4] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[5] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW C | 2009年 / 80卷 / 02期

关键词：

SHELL-MODEL;

D O I：

10.1103/PhysRevC.80.024315

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：

We construct effective two-body Hamiltonians and E2 operators for the p shell by performing 16h Omega ab initio no-core shell model (NCSM) calculations for A=5 and A=6 nuclei and explicitly projecting the many-body Hamiltonians and E2 operator onto the 0h Omega space. We then separate the effective E2 operator into one-body and two-body contributions employing the two-body valence cluster approximation. We analyze the convergence of proton and neutron valence one-body contributions with increasing model space size and explore the role of valence two-body contributions. We show that the constructed effective E2 operator can be parametrized in terms of one-body effective charges giving a good estimate of the NCSM result for heavier p-shell nuclei.

引用

页数：9

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