Mirror symmetry at mass A = 54: E4 effective charges near doubly magic 56Ni
(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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https://lup.lub.lu.se/record/ee36254a-5a28-44fa-8047-24b30ea2a744
- author
- organization
- publishing date
- 2022-05-11
- 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
- 2024-09-21 01:52:07
@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}}, }