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alpha-decay calculations of heavy nuclei using an effective Skyrme interaction

Ward, Daniel LU ; Carlsson, Gillis LU and Åberg, Sven LU (2013) In Physical Review C (Nuclear Physics) 88(6).
Abstract
Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode, and in the search of new superheavy elements one often observes chains of alpha decays. Purpose: Explore and test microscopic descriptions of alpha decay based on theories with effective nuclear interactions. Methods: The nuclear ground states are calculated with the Hartree-Fock-Bogoliubov (HFB) method using the Skyrme interaction. Microscopic alpha-decay formation amplitudes are calculated from the HFB wave functions, and the R-matrix formalism is utilized to obtain decay probabilities. Results: Using a large harmonic-oscillator basis we obtain converged alpha-decay widths. A comparison with experiment including all spherical even-even alpha emitting... (More)
Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode, and in the search of new superheavy elements one often observes chains of alpha decays. Purpose: Explore and test microscopic descriptions of alpha decay based on theories with effective nuclear interactions. Methods: The nuclear ground states are calculated with the Hartree-Fock-Bogoliubov (HFB) method using the Skyrme interaction. Microscopic alpha-decay formation amplitudes are calculated from the HFB wave functions, and the R-matrix formalism is utilized to obtain decay probabilities. Results: Using a large harmonic-oscillator basis we obtain converged alpha-decay widths. A comparison with experiment including all spherical even-even alpha emitting nuclei shows that the model consistently predicts too small formation amplitudes while relative values are in good agreement with experiment. Conclusions: The method was found to be numerically practical even with a large basis size. The comparison of formation amplitudes suggests that the pairing type correlations included in the HFB approach cannot produce sufficient a-particle clustering. (Less)
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type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
88
issue
6
article number
064316
publisher
American Physical Society
external identifiers
  • wos:000328689700002
  • scopus:84893031821
ISSN
0556-2813
DOI
10.1103/PhysRevC.88.064316
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
id
d58e87d6-d457-4ea6-a2f5-dbf9dac39b2b (old id 4262961)
date added to LUP
2016-04-01 13:28:11
date last changed
2022-03-21 18:46:14
@article{d58e87d6-d457-4ea6-a2f5-dbf9dac39b2b,
  abstract     = {{Background: For nuclei heavier than Pb-208 alpha decay is a dominating decay mode, and in the search of new superheavy elements one often observes chains of alpha decays. Purpose: Explore and test microscopic descriptions of alpha decay based on theories with effective nuclear interactions. Methods: The nuclear ground states are calculated with the Hartree-Fock-Bogoliubov (HFB) method using the Skyrme interaction. Microscopic alpha-decay formation amplitudes are calculated from the HFB wave functions, and the R-matrix formalism is utilized to obtain decay probabilities. Results: Using a large harmonic-oscillator basis we obtain converged alpha-decay widths. A comparison with experiment including all spherical even-even alpha emitting nuclei shows that the model consistently predicts too small formation amplitudes while relative values are in good agreement with experiment. Conclusions: The method was found to be numerically practical even with a large basis size. The comparison of formation amplitudes suggests that the pairing type correlations included in the HFB approach cannot produce sufficient a-particle clustering.}},
  author       = {{Ward, Daniel and Carlsson, Gillis and Åberg, Sven}},
  issn         = {{0556-2813}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C (Nuclear Physics)}},
  title        = {{alpha-decay calculations of heavy nuclei using an effective Skyrme interaction}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.88.064316}},
  doi          = {{10.1103/PhysRevC.88.064316}},
  volume       = {{88}},
  year         = {{2013}},
}