Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei

A model of quantal Brownian motion in fermionic reservoirs is applied to study the time evolution of a giant isovector dipole mode in Pb208. The coupled equations of irreversible motion for the excited collective mode and for the nucleon intrinsic degrees of freedom are simultaneously solved and the...

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Autores principales: Hernández, Ester Susana, Dorso, Claudio Oscar
Publicado: 1984
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v30_n5_p1711_Hernandez
http://hdl.handle.net/20.500.12110/paper_05562813_v30_n5_p1711_Hernandez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562813_v30_n5_p1711_Hernandez
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spelling paper:paper_05562813_v30_n5_p1711_Hernandez2023-06-08T15:41:30Z Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei Hernández, Ester Susana Dorso, Claudio Oscar A model of quantal Brownian motion in fermionic reservoirs is applied to study the time evolution of a giant isovector dipole mode in Pb208. The coupled equations of irreversible motion for the excited collective mode and for the nucleon intrinsic degrees of freedom are simultaneously solved and their energies, entropies, and relative populations are observed over a lengthy time interval. The resonant decay can be seen together with the excitation of the Fermi sea towards a non-Fermi asymptotic distribution. It is found that the effective decay rate is smaller than the downwards transition rate, in contrast to the widespread assumption in microscopic models of resonance damping. Diffusion, as well as dissipation, appears as a feature of mutual equilibration. © 1984 The American Physical Society. Fil:Hernández, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dorso, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1984 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v30_n5_p1711_Hernandez http://hdl.handle.net/20.500.12110/paper_05562813_v30_n5_p1711_Hernandez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A model of quantal Brownian motion in fermionic reservoirs is applied to study the time evolution of a giant isovector dipole mode in Pb208. The coupled equations of irreversible motion for the excited collective mode and for the nucleon intrinsic degrees of freedom are simultaneously solved and their energies, entropies, and relative populations are observed over a lengthy time interval. The resonant decay can be seen together with the excitation of the Fermi sea towards a non-Fermi asymptotic distribution. It is found that the effective decay rate is smaller than the downwards transition rate, in contrast to the widespread assumption in microscopic models of resonance damping. Diffusion, as well as dissipation, appears as a feature of mutual equilibration. © 1984 The American Physical Society.
author Hernández, Ester Susana
Dorso, Claudio Oscar
spellingShingle Hernández, Ester Susana
Dorso, Claudio Oscar
Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
author_facet Hernández, Ester Susana
Dorso, Claudio Oscar
author_sort Hernández, Ester Susana
title Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
title_short Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
title_full Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
title_fullStr Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
title_full_unstemmed Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
title_sort dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei
publishDate 1984
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v30_n5_p1711_Hernandez
http://hdl.handle.net/20.500.12110/paper_05562813_v30_n5_p1711_Hernandez
work_keys_str_mv AT hernandezestersusana dissipativedynamicsofinteractingquantaldegreesoffreedominsphericalnuclei
AT dorsoclaudiooscar dissipativedynamicsofinteractingquantaldegreesoffreedominsphericalnuclei
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