有限温度巨大共鳴幅の温度依存性(有限温度原子核の動力学,研究会報告)

概要

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rights: 素粒子論グループ素粒子研究編集部rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf:http://ci.nii.ac.jp/naid/110006410949/Fully microscopic formalism is extensively applied to the width of thermal giant dipole resonances(GDR) built on the highly excited nuclear states. First, the formalism of thermal random phase approximation(TRPA) is extended to describe small deviation from thermal equilibrium due to quasiparticle number fluctuation effect on the mean field. The dissipative thermal RPA(DTRPA) equation is derived from the Liouville equation, and square of the imaginary part of TRPA frequency, (Imhw)^2, is described in terms of an eigenvalue equation. Secondly, to describe the other dissipative effect caused by mode-mode couplings, a temperature-dependent expression for the contribution to the spreading width of the GDR is derived based on the second TRPA. This microscopic formalism will be useful for theoretical studies of average properties at finite temperature such as motional narrowing effect in the self-sustaining finite system like a nucleus.
素粒子論グループ素粒子研究編集部の論文
1993-06-20