β Decay of 49,50Ar

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
  • L. Weissman
  • U. Bergmann
  • J. Cederkall
  • L. M. Fraile
  • S. Franchoo
  • H. Fynbo
  • H. Gausemel
  • H. Jeppesen
  • U. Köster
  • K. L. Kratz
  • T. Nilsson
  • B. Pfeiffer
  • K. Van del Vel
External organisations
  • Michigan State University
  • Complutense University of Madrid
  • Aarhus University
  • University of Oslo
  • Catholic University of Leuven
  • University of Mainz
  • CERN
Original languageEnglish
Pages (from-to)543141-543146
Number of pages6
JournalPhysical Review C - Nuclear Physics
Volume67
Issue number5
Publication statusPublished - 2003 May 1
Publication categoryResearch
Peer-reviewedYes
Externally publishedYes