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

  • H. N. Liu
  • , A. Obertelli
  • , P. Doornenbal
  • , C. A. Bertulani
  • , G. Hagen
  • , J. D. Holt
  • , G. R. Jansen
  • , T. D. Morris
  • , A. Schwenk
  • , R. Stroberg
  • , N. Achouri
  • , H. Baba
  • , F. Browne
  • , D. Calvet
  • , F. Château
  • , S. Chen
  • , N. Chiga
  • , A. Corsi
  • , M. L. Cortés
  • , A. Delbart
  • J. M. Gheller, A. Giganon, A. Gillibert, C. Hilaire, T. Isobe, T. Kobayashi, Y. Kubota, V. Lapoux, T. Motobayashi, I. Murray, H. Otsu, V. Panin, N. Paul, W. Rodriguez, H. Sakurai, M. Sasano, D. Steppenbeck, L. Stuhl, Y. L. Sun, Y. Togano, T. Uesaka, K. Wimmer, K. Yoneda, O. Aktas, T. Aumann, L. X. Chung, F. Flavigny, S. Franchoo, I. Gašparić, R. B. Gerst, J. Gibelin, K. I. Hahn, D. Kim, T. Koiwai, Y. Kondo, P. Koseoglou, J. Lee, C. Lehr, B. D. Linh, T. Lokotko, M. Maccormick, K. Moschner, T. Nakamura, S. Y. Park, D. Rossi, E. Sahin, D. Sohler, P. A. Söderström, S. Takeuchi, H. Törnqvist, V. Vaquero, V. Wagner, S. Wang, V. Werner, X. Xu, H. Yamada, D. Yan, Z. Yang, M. Yasuda, L. Zanetti
  • APHP – Paris Saclay University
  • Technische Universität Darmstadt
  • KTH Royal Institute of Technology
  • RIKEN Nishina Center
  • Texas A&M University-Commerce
  • Oak Ridge National Laboratory
  • University of Tennessee, Knoxville
  • TRIUMF
  • GSI Helmholtz Centre for Heavy Ion Research
  • Max Planck Institute for Nuclear Physics
  • Université Paris-Sud
  • Peking University
  • The University of Hong Kong
  • Tohoku University
  • The University of Tokyo
  • Universidad Nacional de Colombia
  • Rikkyo University
  • Vietnam Atomic Energy Institute
  • Ruder Boskovic Institute
  • University of Cologne
  • Université de Caen
  • Ewha Womans University
  • Tokyo Institute of Technology
  • University of Oslo
  • MTA Atomki
  • CSIC - Instituto de Estructura de la Materia (IEM)
  • CAS - Institute of Modern Physics

Producción: Contribución a una revistaArtículorevisión exhaustiva

79 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Número de artículo072502
PublicaciónPhysical Review Letters
Volumen122
N.º7
DOI
EstadoPublicada - 21 feb. 2019
Publicado de forma externa

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