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New mass measurements of neutron-rich nuclei near N = 20

Abstract : The masses of 39 neutron-rich nuclei in the mass range 17–37 have been measured using a direct time-of-flight technique following the fragmentation of a 48Ca beam at 55 MeV/nucleon. The masses of 29,30Ne, 34,35Mg and 36,37Al are reported for the first time. The very neutron-rich nuclei, 31–33Na, are found to be 2–4 MeV less bound than previously believed. A comparison is made with recently available large scale shell model calculations encompassing the deformed A∼32 nuclei. Conclusions are drawn regarding the extent of the region of deformation, which is found to include 30Ne.
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N.A. Orr, W. Mittig, L.K. Fifield, M. Lewitowicz, E. Plagnol, et al.. New mass measurements of neutron-rich nuclei near N = 20. Physics Letters B, Elsevier, 1991, 258, pp.29-34. ⟨10.1016/0370-2693(91)91203-8⟩. ⟨in2p3-00014460⟩



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