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Influence of Nuclear Structure on Decay Properties of Heavy Nuclei

Ward, Daniel LU (2017)
Abstract (Swedish)
This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yield
distributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavy
nuclei is one of the central topics for investigation. α decay is treated in a microscopic approach employing
Skyrme-Hartree-Fock-Bogoliubov wave functions to describe the formation of an α cluster in the unstable
nucleus. Fission is treated using the random-walk approach, where the nuclear level density obtained from a
detailed model influences the dynamical evolution of the shape of the nucleus. The dissertation contains five
original research papers, and an introductory part containing background... (More)
This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yield
distributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavy
nuclei is one of the central topics for investigation. α decay is treated in a microscopic approach employing
Skyrme-Hartree-Fock-Bogoliubov wave functions to describe the formation of an α cluster in the unstable
nucleus. Fission is treated using the random-walk approach, where the nuclear level density obtained from a
detailed model influences the dynamical evolution of the shape of the nucleus. The dissertation contains five
original research papers, and an introductory part containing background information and some additional
details of the studies.
Paper I contains an investigation of the α-particle formation amplitudes and decay rates obtained with
Skyrme-Hartree-Fock-Bogoliubov wave functions for even-even near-spherical nuclei.
Paper II contains a study of some more aspects of the description in Paper I.
Paper III extends the application of the method in papers I and II to odd-mass near-spherical nuclei.
Hindrance factors and the competition between α-decay paths to different excited states are investigated.
Paper IV deals with the theoretical description of low-lying states in superheavy nuclei observed in α-
decay and spectroscopy measurements on element 115 decay chains.
Paper V contains results for fission-yield distributions obtained by combining the nuclear level densities
from a combinatorial model with the five-dimensional shape space random-walk approach. The influence on the
yields from the structure of the microscopically calculated level densities is investigated.
(Less)
Abstract
This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yield
distributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavy
nuclei is one of the central topics for investigation. α decay is treated in a microscopic approach employing
Skyrme-Hartree-Fock-Bogoliubov wave functions to describe the formation of an α cluster in the unstable
nucleus. Fission is treated using the random-walk approach, where the nuclear level density obtained from a
detailed model influences the dynamical evolution of the shape of the nucleus. The dissertation contains five
original research papers, and an introductory part containing background... (More)
This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yield
distributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavy
nuclei is one of the central topics for investigation. α decay is treated in a microscopic approach employing
Skyrme-Hartree-Fock-Bogoliubov wave functions to describe the formation of an α cluster in the unstable
nucleus. Fission is treated using the random-walk approach, where the nuclear level density obtained from a
detailed model influences the dynamical evolution of the shape of the nucleus. The dissertation contains five
original research papers, and an introductory part containing background information and some additional
details of the studies.
Paper I contains an investigation of the α-particle formation amplitudes and decay rates obtained with
Skyrme-Hartree-Fock-Bogoliubov wave functions for even-even near-spherical nuclei.
Paper II contains a study of some more aspects of the description in Paper I.
Paper III extends the application of the method in papers I and II to odd-mass near-spherical nuclei.
Hindrance factors and the competition between α-decay paths to different excited states are investigated.
Paper IV deals with the theoretical description of low-lying states in superheavy nuclei observed in α-
decay and spectroscopy measurements on element 115 decay chains.
Paper V contains results for fission-yield distributions obtained by combining the nuclear level densities
from a combinatorial model with the five-dimensional shape space random-walk approach. The influence on the
yields from the structure of the microscopically calculated level densities is investigated.
(Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Frauendorf, Stefan, University of Notre Dame, Notre Dame, Indiana, USA
organization
publishing date
type
Thesis
publication status
published
subject
keywords
alpha decay, hindrance factors, Skyrme-Hartree-Fock-Bogoliubov model, superheavy nuclei, fission yields, Brownian-shape motion, nuclear structure, nuclear level density, alpha decay, hindrance factors, Skyrme-Hartree-Fock-Bogoliubov model, superheavy nuclei, fission yields, Brownian-shape motion, nuclear structure, nuclear level density, Fysicumarkivet A:2017:Ward
pages
150 pages
defense location
Rydbergsalen, Fysicum, Sölvegatan 14A, Lund University, Faculty of Engineering.
defense date
2017-01-13 13:15
ISBN
978-91-7753-121-0
978-91-7753-120-3
language
English
LU publication?
yes
id
ae456b85-3316-4c61-9ae0-d51ec3825b46
date added to LUP
2016-12-14 13:39:49
date last changed
2017-09-15 12:45:37
@phdthesis{ae456b85-3316-4c61-9ae0-d51ec3825b46,
  abstract     = {This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yield<br/>distributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavy<br/>nuclei is one of the central topics for investigation. α decay is treated in a microscopic approach employing<br/>Skyrme-Hartree-Fock-Bogoliubov wave functions to describe the formation of an α cluster in the unstable<br/>nucleus. Fission is treated using the random-walk approach, where the nuclear level density obtained from a<br/>detailed model influences the dynamical evolution of the shape of the nucleus. The dissertation contains five<br/>original research papers, and an introductory part containing background information and some additional<br/>details of the studies.<br/>Paper I contains an investigation of the α-particle formation amplitudes and decay rates obtained with<br/>Skyrme-Hartree-Fock-Bogoliubov wave functions for even-even near-spherical nuclei.<br/>Paper II contains a study of some more aspects of the description in Paper I.<br/>Paper III extends the application of the method in papers I and II to odd-mass near-spherical nuclei.<br/>Hindrance factors and the competition between α-decay paths to different excited states are investigated.<br/>Paper IV deals with the theoretical description of low-lying states in superheavy nuclei observed in α-<br/>decay and spectroscopy measurements on element 115 decay chains.<br/>Paper V contains results for fission-yield distributions obtained by combining the nuclear level densities<br/>from a combinatorial model with the five-dimensional shape space random-walk approach. The influence on the<br/>yields from the structure of the microscopically calculated level densities is investigated.<br/>},
  author       = {Ward, Daniel},
  isbn         = {978-91-7753-121-0},
  keyword      = {alpha decay,hindrance factors,Skyrme-Hartree-Fock-Bogoliubov model,superheavy nuclei,fission yields,Brownian-shape motion,nuclear structure,nuclear level density,alpha decay,hindrance factors,Skyrme-Hartree-Fock-Bogoliubov model,superheavy nuclei,fission yields,Brownian-shape motion,nuclear structure,nuclear level density,Fysicumarkivet A:2017:Ward},
  language     = {eng},
  month        = {01},
  pages        = {150},
  school       = {Lund University},
  title        = {Influence of Nuclear Structure on Decay Properties of Heavy Nuclei},
  year         = {2017},
}