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On Statistical Properties of the Gamow–Teller Strength Distribution in 60 Ca

Severyukhin, A. P. LU ; Arsenyev, N. N. ; Borzov, I. N. ; Nazmitdinov, R. G. and Åberg, S. LU (2020) In Physics of Atomic Nuclei 83(2). p.171-178
Abstract

Abstract: The β-decay half-life and the delayed neutron emission of 60Ca are studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling and the tensor correlations, considered in the model. For 60Sc, the spin-parity of the ground state is found to be 1+. We predict that the half-life of 60Ca is 0.3 ms, while the total probabilities of the βxn emission is 6.1%. To elucidate the obtained results, the random matrix theory has been applied to analyse the statistical properties of the $$1^{+}$$ spectrum populated in the β-decay. We found a... (More)

Abstract: The β-decay half-life and the delayed neutron emission of 60Ca are studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling and the tensor correlations, considered in the model. For 60Sc, the spin-parity of the ground state is found to be 1+. We predict that the half-life of 60Ca is 0.3 ms, while the total probabilities of the βxn emission is 6.1%. To elucidate the obtained results, the random matrix theory has been applied to analyse the statistical properties of the $$1^{+}$$ spectrum populated in the β-decay. We found a remarkable agreement between the GT strength distribution, obtained within the microscopic approach, and the ones, generated by means of the random coupling between the one- and two-phonon configurations.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics of Atomic Nuclei
volume
83
issue
2
pages
8 pages
publisher
MAIK Nauka/Interperiodica
external identifiers
  • scopus:85089221594
ISSN
1063-7788
DOI
10.1134/S106377882002026X
language
English
LU publication?
yes
id
1c4f5d2f-d898-4981-9fb0-be296a85d61f
date added to LUP
2020-08-19 08:50:35
date last changed
2022-04-19 00:23:36
@article{1c4f5d2f-d898-4981-9fb0-be296a85d61f,
  abstract     = {{<p>Abstract: The β-decay half-life and the delayed neutron emission of <sup>60</sup>Ca are studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling and the tensor correlations, considered in the model. For <sup>60</sup>Sc, the spin-parity of the ground state is found to be 1<sup>+</sup>. We predict that the half-life of <sup>60</sup>Ca is 0.3 ms, while the total probabilities of the βxn emission is 6.1%. To elucidate the obtained results, the random matrix theory has been applied to analyse the statistical properties of the $$1^{+}$$ spectrum populated in the β-decay. We found a remarkable agreement between the GT strength distribution, obtained within the microscopic approach, and the ones, generated by means of the random coupling between the one- and two-phonon configurations.</p>}},
  author       = {{Severyukhin, A. P. and Arsenyev, N. N. and Borzov, I. N. and Nazmitdinov, R. G. and Åberg, S.}},
  issn         = {{1063-7788}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{171--178}},
  publisher    = {{MAIK Nauka/Interperiodica}},
  series       = {{Physics of Atomic Nuclei}},
  title        = {{On Statistical Properties of the Gamow–Teller Strength Distribution in <sup>60</sup> Ca}},
  url          = {{http://dx.doi.org/10.1134/S106377882002026X}},
  doi          = {{10.1134/S106377882002026X}},
  volume       = {{83}},
  year         = {{2020}},
}