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Shape coexistence and critical phenomena in atomic nuclei

Veerle Hellemans (2007)
abstract
In this work, we have studied shape coexistence in the neutron-deficient Pb isotopes within the framework of the interacting boson model (IBM) with configuration mixing. Our theoretical results are extensively compared to the experimental data at hand such as spectra, electric quadrupole transitions and isotopic shifts. Various aspects of the mixing are analyzed and some remarks on the current classification of states according to their particle-hole character in 190Pb-194Pb are formulated. Also, we performed an analysis of the evolving geometry associated with the IBM including configuration mixing by means of techniques provided in catastrophe theory. Phase diagrams are presented for selected cases which encompass the dynamical symmetry limits of the IBM. We discuss the order of the associated phase transitions and derive analytical expressions for power-laws in the case of U(5)-O(6) mixing.
Please use this url to cite or link to this publication:
author
promoter
UGent and Piet Van Isacker
organization
year
type
dissertation
publication status
published
subject
pages
122 pages
defense location
Gent
defense date
2007-09-24 16:00
language
English
UGent publication?
yes
classification
D1
id
516986
handle
http://hdl.handle.net/1854/LU-516986
alternative location
http://lib.ugent.be/fulltxt/RUG01/001/238/972/RUG01-001238972_2010_0001_AC.pdf
date created
2009-03-11 10:08:40
date last changed
2017-01-16 10:46:21
@phdthesis{516986,
  abstract     = {In this work, we have studied shape coexistence in the neutron-deficient Pb isotopes within the framework of the interacting boson model (IBM) with configuration mixing. Our theoretical results are extensively compared to the experimental data at hand such as spectra, electric quadrupole transitions and isotopic shifts. Various aspects of the mixing are analyzed and some remarks on the current classification of states according to their particle-hole character in 190Pb-194Pb are formulated.
Also, we performed an analysis of the evolving geometry associated with the IBM including configuration mixing by means of techniques provided in catastrophe theory. Phase diagrams are presented for selected cases which encompass the dynamical symmetry limits of the IBM. We discuss the order of the associated phase transitions and derive analytical expressions for power-laws in the case of U(5)-O(6) mixing.},
  author       = {Hellemans, Veerle},
  language     = {eng},
  pages        = {122},
  school       = {Ghent University},
  title        = {Shape coexistence and critical phenomena in atomic nuclei},
  url          = {http://lib.ugent.be/fulltxt/RUG01/001/238/972/RUG01-001238972\_2010\_0001\_AC.pdf},
  year         = {2007},
}

Chicago
Hellemans, Veerle. 2007. “Shape Coexistence and Critical Phenomena in Atomic Nuclei.”
APA
Hellemans, Veerle. (2007). Shape coexistence and critical phenomena in atomic nuclei.
Vancouver
1.
Hellemans V. Shape coexistence and critical phenomena in atomic nuclei. 2007.
MLA
Hellemans, Veerle. “Shape Coexistence and Critical Phenomena in Atomic Nuclei.” 2007 : n. pag. Print.