Nuclear structure of 17Ne by the three-neutron pickup (3He,6He) reaction

V. Guimarães, S. Kubono, N. Ikeda, I. Katayama, T. Nomura, M. H. Tanaka, Y. Fuchi, H. Kawashima, S. Kato, H. Toyokawa, C. C. Yun, T. Niizeki, T. Kubo, M. Ohura, and M. Hosaka
Phys. Rev. C 58, 116 – Published 1 July 1998
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The nuclear structure of 17Ne has been studied by the 20Ne(3He,6He)17Ne reaction at 70 MeV. Thirteen levels were identified in 17Ne, and angular distributions have been measured for the first time for this reaction. Based on the observed transferred angular momentum dependence of the angular distributions, a spin-parity assignment has been made for several states in 17Ne. With the inclusion of the data on 17Ne, T=32 quartet analog states have been completed for six levels in the A=17 isobar system. The level shifts in these A=17 nuclei are analyzed in terms of the isobaric multiplet mass equation (IMME). The results of such an analysis show a slight linear dependence of the b and c coefficients of the equation on the excitation energy. The coefficients for the positive parity states seem to follow a different systematics than the negative parity states, suggesting that these parity-dependent level shifts are reflecting the structure change. These coefficients of the IMME are discussed.

  • Received 11 February 1998


©1998 American Physical Society

Authors & Affiliations

V. Guimarães1,2, S. Kubono2, N. Ikeda3, I. Katayama2, T. Nomura4, M. H. Tanaka4, Y. Fuchi4, H. Kawashima4, S. Kato4, H. Toyokawa5, C. C. Yun6, T. Niizeki7, T. Kubo8, M. Ohura8, and M. Hosaka9

  • 1Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
  • 2Center for Nuclear Study, University of Tokyo, 3-2-1 Midori-cho, Tanashi, Tokyo 188, Japan
  • 3Department of Physics, Kyushuu University, Fukuoka, Japan
  • 4Institute of Particle and Nuclear Physics, KEK, Tsukuba 305, Japan
  • 5Research Center for Nuclear Physics, Osaka 567, Japan
  • 6Department of Physics, Tohoku University, Sendai 980, Japan
  • 7Tokyo Institute of Technology, Meguro, Tokyo 152, Japan
  • 8Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
  • 9Institute for Molecular Science, Okazaki 444, Japan

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Vol. 58, Iss. 1 — July 1998

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