Complete structure determination of the astrophysically important nucleus 20Na below the proton threshold

D. Seweryniak, P. J. Woods, B. Blank, M. P. Carpenter, T. Davinson, S. J. Freeman, J. Görres, A. Heinz, R. V F Janssens, H. Mahmud, T. L. Khoo, Z. Liu, G. Mukherjee, E. Rehm, F. Sarazin, J. Shergur, M. Shawcross, S. Sinha, A. Woehr

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The fusion-evaporation reaction 10B(12C,2n) was used to make the first observation of in-beam γ decays from the astrophysically important nucleus 20Na, lying adjacent to the proton drip-line. All states below the proton threshold in 20Na were populated and identified in the experiment. These include new levels, previously unresolved levels, and states located with improved energy precision. The level structure of 20Na, and its γ transitions, are compared to the mirror partner 20F measured simultaneously in this experiment. In particular, a high degree of energy stability is found for all negative parity states. These results are discussed in the context of the nuclear shell model. © 2004 Published by Elsevier B.V.
    Original languageEnglish
    Pages (from-to)170-175
    Number of pages5
    JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume590
    Issue number3-4
    DOIs
    Publication statusPublished - 24 Jun 2004

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