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Mirror symmetry at mass A = 54: E4 effective charges near doubly magic 56Ni

Rudolph, D. LU orcid ; Blank, B. ; Giovinazzo, J. ; Roger, T. ; Alvarez-Pol, H. ; Arokia Raj, A. ; Ascher, P. ; Caamaño-Fresco, M. ; Caceres, L. and Cox, D.M. LU , et al. (2022) In Physics Letters B 830.
Abstract
Proton-emission branches of the 10+ isomer in the Tz=−1 nucleus 54Ni have been imaged with the active target and time projection chamber (ACTAR TPC) in an experiment conducted at the Grand Accélérateur National d'Ions Lourds (GANIL). The completed decay scheme allows derivation of the reduced transition strengths, B(E2;10+→8+) and B(E4;10+→6+), for the two competing γ-ray transitions. By means of a comparison with their well-known ‘mirror transitions’ in Tz=+1 54Fe, and aided by a variety of shell-model calculations in the fp model space, effective charges for E4 transitions near N=Z... (More)
Proton-emission branches of the 10+ isomer in the Tz=−1 nucleus 54Ni have been imaged with the active target and time projection chamber (ACTAR TPC) in an experiment conducted at the Grand Accélérateur National d'Ions Lourds (GANIL). The completed decay scheme allows derivation of the reduced transition strengths, B(E2;10+→8+) and B(E4;10+→6+), for the two competing γ-ray transitions. By means of a comparison with their well-known ‘mirror transitions’ in Tz=+1 54Fe, and aided by a variety of shell-model calculations in the fp model space, effective charges for E4 transitions near N=Z 56Ni can be deduced: επ≈1.40 and εν≈0.30. Mirror-energy differences are explored with various shell-model interactions and isospin-symmetry breaking terms. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
54Ni, Nuclear shell model, Isospin symmetry, Electromagnetic decay, E4 transition, Effective charges
in
Physics Letters B
volume
830
article number
137144
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:85129981685
ISSN
0370-2693
DOI
10.1016/j.physletb.2022.137144
project
Nuclear Structure at the Limits: Isotope-selective Spectroscopy
language
English
LU publication?
yes
id
ee36254a-5a28-44fa-8047-24b30ea2a744
alternative location
https://www.sciencedirect.com/science/article/pii/S0370269322002787
date added to LUP
2022-05-11 20:23:12
date last changed
2024-03-06 11:29:25
@article{ee36254a-5a28-44fa-8047-24b30ea2a744,
  abstract     = {{Proton-emission branches of the 10<sup>+</sup> isomer in the T<sub>z</sub>=−1 nucleus <sup>54</sup>Ni have been imaged with the active target and time projection chamber (ACTAR TPC) in an experiment conducted at the Grand Accélérateur National d'Ions Lourds (GANIL). The completed decay scheme allows derivation of the reduced transition strengths, <i>B</i>(<i>E</i>2;10<sup>+</sup>→8<sup>+</sup>) and <i>B</i>(<i>E</i>4;10<sup>+</sup>→6<sup>+</sup>), for the two competing γ-ray transitions. By means of a comparison with their well-known ‘mirror transitions’ in T<sub>z</sub>=+1 <sup>54</sup>Fe, and aided by a variety of shell-model calculations in the <i>fp</i> model space, effective charges for <i>E</i>4 transitions near <i>N</i>=<i>Z</i> <sup>56</sup>Ni can be deduced: ε<sub>π</sub>≈1.40 and ε<sub>ν</sub>≈0.30. Mirror-energy differences are explored with various shell-model interactions and isospin-symmetry breaking terms.}},
  author       = {{Rudolph, D. and Blank, B. and Giovinazzo, J. and Roger, T. and Alvarez-Pol, H. and Arokia Raj, A. and Ascher, P. and Caamaño-Fresco, M. and Caceres, L. and Cox, D.M. and Fernández-Domínguez, B. and Lois-Fuentes, J. and Gerbaux, M. and Grévy, S and Grinyer, G.F. and Kamalou, O. and Mauss, B. and Mentana, A. and Pancin, J. and Pibernat, J. and Piot, J. and Sorlin, Olivier and Stodel, C. and Thomas, J.-C. and Versteegen, M.}},
  issn         = {{0370-2693}},
  keywords     = {{54Ni; Nuclear shell model; Isospin symmetry; Electromagnetic decay; E4 transition; Effective charges}},
  language     = {{eng}},
  month        = {{05}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters B}},
  title        = {{Mirror symmetry at mass <i>A</i> = 54: <i>E</i>4 effective charges near doubly magic <sup>56</sup>Ni}},
  url          = {{https://lup.lub.lu.se/search/files/117964917/1_s2.0_S0370269322002787_main.pdf}},
  doi          = {{10.1016/j.physletb.2022.137144}},
  volume       = {{830}},
  year         = {{2022}},
}