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How Robust is the N=34 Subshell Closure? First Spectroscopy of Ar 52

Title
How Robust is the N=34 Subshell Closure? First Spectroscopy of Ar 52
Authors
Liu H.N.Obertelli A.Doornenbal P.Bertulani C.A.Hagen G.Holt J.D.Jansen G.R.Morris T.D.Schwenk A.Stroberg R.Achouri N.Baba H.Lee J.Lehr C.Linh B.D.Lokotko T.Maccormick M.Moschner K.Nakamura T.Park S.Y.Browne F.Calvet D.Château F.Chen S.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.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.Gašparić I.Gerst R.-B.Gibelin J.Hahn K.I.Kim D.Koiwai T.Kondo Y.Koseoglou P.Rossi D.Sahin E.Sohler D.Söderström P.-A.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
한인식scopus
Issue Date
2019
Journal Title
Physical Review Letters
ISSN
0031-9007JCR Link
Citation
Physical Review Letters vol. 122, no. 7
Publisher
American Physical Society
Indexed
SCI; SCIE; SCOPUS scopus
Document Type
Article
Abstract
The first γ-ray spectroscopy of Ar52, with the neutron number N=34, was measured using the K53(p,2p) one-proton removal reaction at ∼210 MeV/u at the RIBF facility. The 21+ excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N>20. This result is the first experimental signature of the persistence of the N=34 subshell closure beyond Ca54, i.e., below the magic proton number Z=20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 21+ systematics of neutron-rich Ar isotopes, and support a N=34 subshell closure in Ar52. © 2019 authors. Published by the American Physical Society.
DOI
10.1103/PhysRevLett.122.072502
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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