Nuclear Deformation at Finite Temperature

被引：21

作者：

Alhassid, Y. ^{[1
]}

Gilbreth, C. N. ^{[1
]}

Bertsch, G. F. ^{[2
,3
]}

机构：

[1] Yale Univ, Ctr Theoret Phys, Sloane Phys Lab, New Haven, CT 06520 USA

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

[3] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 26期

关键词：

BETA-DECAY; EXPANSION; FORCES;

D O I：

10.1103/PhysRevLett.113.262503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Deformation, a key concept in our understanding of heavy nuclei, is based on a mean-field description that breaks the rotational invariance of the nuclear many-body Hamiltonian. We present a method to analyze nuclear deformations at finite temperature in a framework that preserves rotational invariance. The auxiliary-field Monte Carlo method is used to generate a statistical ensemble and calculate the probability distribution associated with the quadrupole operator. Applying the technique to nuclei in the rare-earth region, we identify model-independent signatures of deformation and find that deformation effects persist to temperatures higher than the spherical-to-deformed shape phase-transition temperature of mean-field theory.

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页数：11

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