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

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.; 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.; Lee, J.; Lehr, C.; Linh, B. D.; Lokotko, T.; MacCormick, M.; Moschner, K.; Nakamura, T.; Park, S. Y.; 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.

doi:10.1103/PhysRevLett.122.072502

Title: How Robust is the $N = 34$ Subshell Closure? First Spectroscopy of ${}^{52}{Ar}$

Journal Article · Thu Feb 21 00:00:00 EST 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.122.072502· OSTI ID:1495555

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.; Browne, F.; Calvet, D.; Château, F.; Chen, S.; Chiga, N.; Corsi, A.; Cortés, M. L.; Delbart, A. more »

The first γ-ray spectroscopy of ⁵²Ar, with the neutron number N = 34, was measured using the ⁵³K(p, 2p) one-proton removal reaction at ~210 MeV/u at the RIBF facility. The 2⁺₁ 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 ⁵⁴Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2+1 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in ⁵²Ar.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-08ER41533; SC0018223; AC05-00OR22725

OSTI ID:: 1495555

Alternate ID(s):: OSTI ID: 1545567

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 122 Journal Issue: 7; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 47 works

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