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Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs

Thesis/Dissertation:

Abstract

In this study we have built the quadrupolar collective Bohr Hamiltonian in a purely microscopic way by using an approximation of the time-dependant Hartree-Fock adiabatic approach. The purpose of this work was to obtain a quantitative description of the collective properties in the low energy range of intermediate and heavy nuclei by using a 2-body effective interaction of Skyrme-type. We consider low energy processes as dynamic regimes in which the collective movement is adiabatic when compared with modes associated to individual freedom. In the N-body solution we propose, we have assumed that: -) a mean field exists at any moment, -) some collective variables exist whose temporal variations include all the dynamics, and -) the collective movement is adiabatic. This work is a microscopic formulation and an efficient approach to resolve the Bohr and Mottelson unified model. Low energy spectra have been computed for 4 nuclei: Ge{sup 74}, Se{sup 76}, Cd{sup 110} and Pt{sup 186} and they agree well with experimental data.
Authors:
Publication Date:
Oct 23, 1989
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-9519
Resource Relation:
Other Information: 122 refs.; Available from HAL: https://tel.archives-ouvertes.fr/tel-01075873 and also from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis; These Physique Theorique
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CADMIUM 110; COLLECTIVE EXCITATIONS; ENERGY LEVELS; GERMANIUM 74; HAMILTONIANS; HARTREE-FOCK-BOGOLYUBOV THEORY; NILSSON-MOTTELSON MODEL; PLATINUM 188; SELENIUM 76
OSTI ID:
22581778
Research Organizations:
Universite Paris-6, Paris (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR1700758026190
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
172 page(s)
Announcement Date:
Apr 08, 2017

Thesis/Dissertation:

Citation Formats

Deloncle, I. Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs. France: N. p., 1989. Web.
Deloncle, I. Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs. France.
Deloncle, I. 1989. "Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs." France.
@misc{etde_22581778,
title = {Collective excitations at low energy: microscopic study of rotation, vibration and their coupling in even-even nuclei; Excitations collectives a basse energie: Etude microscopique de la rotation, de la vibration et de leur couplage dans les noyaux pair-pairs}
author = {Deloncle, I.}
abstractNote = {In this study we have built the quadrupolar collective Bohr Hamiltonian in a purely microscopic way by using an approximation of the time-dependant Hartree-Fock adiabatic approach. The purpose of this work was to obtain a quantitative description of the collective properties in the low energy range of intermediate and heavy nuclei by using a 2-body effective interaction of Skyrme-type. We consider low energy processes as dynamic regimes in which the collective movement is adiabatic when compared with modes associated to individual freedom. In the N-body solution we propose, we have assumed that: -) a mean field exists at any moment, -) some collective variables exist whose temporal variations include all the dynamics, and -) the collective movement is adiabatic. This work is a microscopic formulation and an efficient approach to resolve the Bohr and Mottelson unified model. Low energy spectra have been computed for 4 nuclei: Ge{sup 74}, Se{sup 76}, Cd{sup 110} and Pt{sup 186} and they agree well with experimental data.}
place = {France}
year = {1989}
month = {Oct}
}