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Level structures of 56,58Ca cast doubt on a doubly magic 60Ca
- Title
- Level structures of 56,58Ca cast doubt on a doubly magic 60Ca
- Authors
- Chen S.; Browne F.; Doornenbal P.; Lee J.; Obertelli A.; Tsunoda Y.; Otsuka T.; Chazono Y.; Hagen G.; Holt J.D.; Jansen G.R.; Ogata K.; Shimizu N.; Utsuno Y.; Yoshida K.; Achouri N.L.; Baba H.; Calvet D.; Château F.; Chiga N.; Corsi A.; Cortés M.L.; Delbart A.; Gheller J.-M.; Giganon A.; Gillibert A.; Hilaire C.; Isobe T.; Kobayashi T.; Kubota Y.; Lapoux V.; Liu H.N.; Motobayashi T.; Murray I.; Otsu H.; Panin V.; Paul N.; Rodriguez W.; Sakurai H.; Sasano M.; Steppenbeck D.; Stuhl L.; Sun Y.L.; Togano Y.; Uesaka T.; Wimmer K.; Yoneda K.; Aktas O.; Aumann T.; Chung L.X.; Flavigny F.; Franchoo S.; Gasparic I.; Gerst R.-B.; Gibelin J.; Hahn K.I.; Kim D.; Koiwai T.; Kondo Y.; Koseoglou P.; Lehr C.; Linh B.D.; Lokotko T.; MacCormick M.; Moschner K.; Nakamura T.; Park S.Y.; Rossi D.; Sahin E.; Söderström P.-A.; Sohler D.; Takeuchi S.; Törnqvist H.; Vaquero V.; Wagner V.; Wang S.; Werner V.; Xu X.; Yamada H.; Yan D.; Yang Z.; Yasuda M.; Zanetti L.
- Ewha Authors
- 한인식
- SCOPUS Author ID
- 한인식
- Issue Date
- 2023
- Journal Title
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- ISSN
- 3702-2693
- Citation
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics vol. 843
- Keywords
- Shell evolution; γ Ray spectroscopy
- Publisher
- Elsevier B.V.
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Gamma decays were observed in 56Ca and 58Ca following quasi-free one-proton knockout reactions from 57,59Sc beams at ≈200 MeV/nucleon. For 56Ca, a γ ray transition was measured to be 1456(12) keV, while for 58Ca an indication for a transition was observed at 1115(34) keV. Both transitions were tentatively assigned as the 21+→0gs+ decays, and were compared to results from ab initio and conventional shell-model approaches. A shell-model calculation in a wide model space with a marginally modified effective nucleon-nucleon interaction depicts excellent agreement with experiment for 21+ level energies, two-neutron separation energies, and reaction cross sections, corroborating the formation of a new nuclear shell above the N = 34 shell. Its constituents, the 0f5/2 and 0g9/2 orbitals, are almost degenerate. This degeneracy precludes the possibility for a doubly magic 60Ca and potentially drives the dripline of Ca isotopes to 70Ca or even beyond. © 2023 The Author(s)
- DOI
- 10.1016/j.physletb.2023.138025
- Appears in Collections:
- 사범대학 > 과학교육과 > Journal papers
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