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α-decay spectra of odd nuclei using the effective Skyrme interaction

Ward, Daniel LU ; Carlsson, Gillis LU and Åberg, Sven LU (2015) In Physical Review C (Nuclear Physics) 92(1).
Abstract
Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode. alpha decay of odd nuclei can give spectroscopic information because different states in the daughter nucleus can be populated in the decay. Purpose: To explore and test microscopic descriptions of alpha decay of odd nuclei based on self-consistent models with effective nuclear interactions. To predict the hindrance of a decay of odd-A superheavy nuclei. Methods: We apply the method of our previous work [D. E. Ward, B. G. Carlsson, and S. Aberg, Phys. Rev. C 88, 064316 (2013)] to the case of odd-A near-spherical nuclei. The Skyrme effective interaction SLy4 is used. Starting from the obtained Hartree-Fock-Bogoliubov vacuum and quasiparticle excitations, the... (More)
Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode. alpha decay of odd nuclei can give spectroscopic information because different states in the daughter nucleus can be populated in the decay. Purpose: To explore and test microscopic descriptions of alpha decay of odd nuclei based on self-consistent models with effective nuclear interactions. To predict the hindrance of a decay of odd-A superheavy nuclei. Methods: We apply the method of our previous work [D. E. Ward, B. G. Carlsson, and S. Aberg, Phys. Rev. C 88, 064316 (2013)] to the case of odd-A near-spherical nuclei. The Skyrme effective interaction SLy4 is used. Starting from the obtained Hartree-Fock-Bogoliubov vacuum and quasiparticle excitations, the alpha-particle formation amplitude is calculated giving the decay rates and hindrance of different alpha-decay channels. Result: The calculated relative decay rates show good agreement with available data. The hindrance of decay channels where the odd nucleon changes orbital is reasonably described by the microscopic calculation. Several hindered ground-state decays of superheavy nuclei are predicted, implying possible alpha-gamma coincidences. Conclusions: The approach offers a practical method of making quantitative predictions for the relative hindrance of different alpha-decay channels. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
92
issue
1
publisher
American Physical Society
external identifiers
  • wos:000358256000003
  • scopus:84938796795
ISSN
0556-2813
DOI
10.1103/PhysRevC.92.014314
language
English
LU publication?
yes
id
77d1d21d-a830-4082-9683-2f8cbd560bad (old id 7773773)
date added to LUP
2015-09-18 11:50:37
date last changed
2017-10-08 04:07:21
@article{77d1d21d-a830-4082-9683-2f8cbd560bad,
  abstract     = {Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode. alpha decay of odd nuclei can give spectroscopic information because different states in the daughter nucleus can be populated in the decay. Purpose: To explore and test microscopic descriptions of alpha decay of odd nuclei based on self-consistent models with effective nuclear interactions. To predict the hindrance of a decay of odd-A superheavy nuclei. Methods: We apply the method of our previous work [D. E. Ward, B. G. Carlsson, and S. Aberg, Phys. Rev. C 88, 064316 (2013)] to the case of odd-A near-spherical nuclei. The Skyrme effective interaction SLy4 is used. Starting from the obtained Hartree-Fock-Bogoliubov vacuum and quasiparticle excitations, the alpha-particle formation amplitude is calculated giving the decay rates and hindrance of different alpha-decay channels. Result: The calculated relative decay rates show good agreement with available data. The hindrance of decay channels where the odd nucleon changes orbital is reasonably described by the microscopic calculation. Several hindered ground-state decays of superheavy nuclei are predicted, implying possible alpha-gamma coincidences. Conclusions: The approach offers a practical method of making quantitative predictions for the relative hindrance of different alpha-decay channels.},
  articleno    = {014314},
  author       = {Ward, Daniel and Carlsson, Gillis and Åberg, Sven},
  issn         = {0556-2813},
  language     = {eng},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {α-decay spectra of odd nuclei using the effective Skyrme interaction},
  url          = {http://dx.doi.org/10.1103/PhysRevC.92.014314},
  volume       = {92},
  year         = {2015},
}