University of Illinois Urbana-Champaign

Properties and dynamics of hot nuclei

Sustich, Andrew Thomas

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Description

Title
Properties and dynamics of hot nuclei
Author(s)
Sustich, Andrew Thomas
Issue Date
1990
Doctoral Committee Chair(s)
Wambach, J.
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Nuclear
Language
eng
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.
Type of Resource
text
Permalink
http://hdl.handle.net/2142/19690
Copyright and License Information
Copyright 1990 Sustich, Andrew Thomas

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