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Unnatural-parity states in 44 21Sc23
Authors:M Lach  J Styczeń  W Meczyński  P Bednarczyk  A Bracco  J Grebosz  A Maj  J C Merdinger  N Schulz  M B Smith  K M Spohr  M Ziebliński
Institution:(1) II. Physikalisches Institut, Universität Göttingen, 37073 Göttingen, Germany;(2) Institute for Nuclear Research and Nuclear Energy, BAS, 1784 Sofia, Bulgaria;(3) Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany;(4) Horia-Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, Bucharest, Romania;(5) Laboratori Nazionali di Legnaro, INFN, 35020 Legnaro (Padova), Italy;(6) Institut de Recherches Subatomiques, CNRS-IN2P3, 67037 Strasbourg, France;(7) Sezione di Padova, INFN, Padova, Italy;(8) Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, 28006 Madrid, Spain;(9) Departamento de Fisica Teórica, Universidad Autónoma de Madrid, 28049 Madrid, Spain;(10) Institut für Kern- und Hadronenphysik, FZ Rossendorf, 01314 Dresden, Germany;(11) Department of Physics, Royal Institute of Technology, 10405 Stockholm, Sweden
Abstract:The neutron-deficient nucleus 68As was populated at high spin in two experiments using the reaction 40Ca(32S, 3pn) at beam energies of 105 and 95 MeV. A self-supporting and a gold-backed, highly enriched 40Ca target were used. Gamma rays were detected with the EUROBALL array, combined with the charged-particle detector array EUCLIDES and the Neutron Wall. The 68As level scheme was considerably extended, especially at negative parity and many previous spin-parity assignments were confirmed or rejected. The total-Routhian-surface (TRS) calculations find shape coexistence and gamma softness for the negative- and positive-parity states, respectively.
Keywords:23  20  Lv gamma transitions and level energies" target="_blank">gif" alt="gamma" align="MIDDLE" BORDER="0"> transitions and level energies  21  60  -n Nuclear structure models and methods
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