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Title:Properties and dynamics of hot nuclei
Author(s):Sustich, Andrew Thomas
Doctoral Committee Chair(s):Wambach, J.
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Nuclear
Abstract:The finite temperature Hartree-Fock (FTHF) equations are developed to describe a thermally equilibrated nucleus. These are solved for the nuclei $\sp{40}$Ca and $\sp{208}$Pb using a Skyrme interaction as the effective nucleon-nucleon interaction. Properties of these nuclei including excitation energy, entropy, and density are investigated as a function of the temperature of the nucleus.
The linear response of a hot nucleus to a small amplitude time-dependent perturbation is derived, resulting in the finite temperature random phase approximation (FTRPA). These equations are solved consistent with the FTHF thermal ground state and Skyrme interaction. The properties of and transition strength to excite collective excitations of various multipolarity is investigated.
The evolution of a hot and/or compressed nucleus is analyzed within the adiabatic approximation using a constrained FTHF method to describe the nucleus away from its equilibrium density. The development of a dynamical instability to long wavelength density fluctuations is described. The FTRPA equations are used to explore the onset of unstable multipole shape vibrations. Their role in the fragmentation of the nucleus is discussed.
Issue Date:1990
Rights Information:Copyright 1990 Sustich, Andrew Thomas
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9021765
OCLC Identifier:(UMI)AAI9021765

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