Phys. Rev. C 67, 054314 (2003) [6 pages]β decay of 49,50Ar
L. Weissman1, U. Bergmann2, J. Cederkall2, L. M. Fraile2 *, S. Franchoo2, H. Fynbo1,3, H. Gausemel4, H. Jeppesen3, U. Köster2, K.-L. Kratz5, T. Nilsson2, B. Pfeiffer5, and K. Van del Vel6 Received 18 February 2003; published 27 May 2003 Information on gross β-decay properties of neutron-rich noble gas isotopes 49,50Ar was obtained at the PSB-ISOLDE facility at CERN using isobaric selectivity achieved by the combination of a plasma ion source with a cooled transfer line and subsequent mass separation. A doubly charged beam was used in the case of 49Ar to suppress the corresponding multicharged background from heavier noble gas fission products. The comparison of the obtained data with results of quasiparticle random-phase approximation calculations indicates that the N=28 shell is not disturbed significantly for neutron-rich Ar nuclei. The obtained results are useful for better understanding of the origin of the 48Ca/46Ca isotopic anomaly discovered in inclusions from the Allende meteorite. ©2003 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevC.67.054314 * On leave from Dept. de Física Atómica, Molecular y Nuclear, Unìversidad Complutense, E-28040 Madrid, Spain. [ Abstract | Previous article | Next article | Issue 5 ] |
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