Intruder configurations in the ground state of 30Ne

H.N. Liu; J. Lee; P. Doornenbal; H. Scheit; S. Takeuchi; N. Aoi; K.A. Li; M. Matsushita; D. Steppenbeck; H. Wang; H. Baba; E. Ideguchi; N. Kobayashi; Y. Kondo; G. Lee; S. Michimasa; T. Motobayashi; A. Poves; H. Sakurai; M. Takechi; Y. Togano; J.A. Tostevin; Y. Utsuno

doi:10.1016/j.physletb.2017.01.052

Physics Letters B (Apr 2017)

Intruder configurations in the ground state of 30Ne

H.N. Liu,
J. Lee,
P. Doornenbal,
H. Scheit,
S. Takeuchi,
N. Aoi,
K.A. Li,
M. Matsushita,
D. Steppenbeck,
H. Wang,
H. Baba,
E. Ideguchi,
N. Kobayashi,
Y. Kondo,
G. Lee,
S. Michimasa,
T. Motobayashi,
A. Poves,
H. Sakurai,
M. Takechi,
Y. Togano,
J.A. Tostevin,
Y. Utsuno

Affiliations

H.N. Liu: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
J. Lee: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
P. Doornenbal: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
H. Scheit: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
S. Takeuchi: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
N. Aoi: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
K.A. Li: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
M. Matsushita: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
D. Steppenbeck: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
H. Wang: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
H. Baba: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
E. Ideguchi: Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
N. Kobayashi: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
Y. Kondo: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
G. Lee: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
S. Michimasa: Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
T. Motobayashi: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
A. Poves: Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
H. Sakurai: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
M. Takechi: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Y. Togano: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
J.A. Tostevin: Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
Y. Utsuno: Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

DOI: https://doi.org/10.1016/j.physletb.2017.01.052
Journal volume & issue: Vol. 767, no. C
pp. 58 – 62

Abstract

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We report on the first detailed study of intruder configurations in the ground state of 30Ne by means of the 12C(30Ne, 29Ne+γ)X one-neutron knockout reaction at 228 MeV/nucleon. Using a combined analysis of individual parallel momentum distributions and partial cross sections we find: (a) comparable p- and d-wave removal strength to 29Ne final states with excitation energies below 200 keV, and (b) significant p-wave removal strength to the 620 keV state of 29Ne, and (c) no evidence for f-wave intruder strength leading to bound 29Ne final states. The SDPF-U-MIX shell model calculation in the sd–pf model space provides a better overall agreement with the measured energy levels of 29Ne and the fp-intruder amplitudes in 30Ne than the SDPF-M prediction, suggesting that the refinement of the sd–pf cross shell interaction and extension of the model space to include the 2p1/2 and 1f5/2 levels are important for understanding the island of inversion.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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