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 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.
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.
| Original language | English |
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| Qualification | Doctor |
| Awarding Institution |
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| Supervisors/Advisors |
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| Award date | 2017 Jan 13 |
| Place of Publication | Lund |
| ISBN (Print) | 978-91-7753-120-3 |
| ISBN (electronic) | 978-91-7753-121-0 |
| Publication status | Published - 2017 Jan 13 |
Bibliographical note
Defence detailsDate: 2017-01-13
Time: 13:15
Place: Rydbergsalen, Fysicum, Sölvegatan 14A, Lund University, Faculty of Engineering.
External reviewer(s)
Name: Frauendorf, Stefan
Title: Professor
Affiliation: University of Notre Dame, Notre Dame, Indiana, USA
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Subject classification (UKÄ)
- Physical Sciences
- Subatomic Physics
Free keywords
- 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