University of Illinois Urbana-Champaign

Properties and dynamics of hot nuclei

Sustich, Andrew Thomas

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https://hdl.handle.net/2142/25097

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 Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • hot nuclei
  • finite temperature Hartree-Fock (FTHF) equations
  • thermally equilibrated nucleus
  • Skyrme interaction
  • nucleon-nucleon interaction
Language
en
Abstract
The finite temperature Hartree-Fock (FTHF) equations are developed to describe a thermally equilibrated nucleus. These are solved for the nuclei 4°Ca and 208Pb 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 collective excitations of various multipolarity and the transition strength to excite them are 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/2142/25097
Copyright and License Information
1990 Andrew Thomas Sustich

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