One-particle excitations outside the Ti-54 semi-magic core: The V-55 and Ti-55 yrast structures

S. Zhu, R. V. F. Janssens, B. Fornal, S. J. Freeman, M. Honma, R. Broda, M. P. Carpenter, A. N. Deacon, B. P. Kay, F. G. Kondev, W. Krolas, J. Kozemczak, A. Larabee, T. Lauritsen, S. N. Liddick, C. J. Lister, P. F. Mantica, T. Otsuka, T. Pawlat, A. RobinsonD. Seweryniak, J. F. Smith, D. Steppenbeck, B. E. Tomlin, J. Wrzesinski, X. Wang

Research output: Contribution to journalArticlepeer-review

Abstract

The level structures of V-55 and Ti-55, the two nuclei with a single nucleon outside the semi-magic Ti-54(22)32 core, have been investigated in order to provide new tests of full pf-shell calculations with the GXPFIA interaction. The addition of a proton does not appear to affect the N = 32 shell Gap significantly. although comparisons between calculations and experiment at high spins (I-pi >= 21/2(-)) indicate the need for a larger model space for an accurate description of the data in this regime. The energy separation between the vp(1/2) and vf(5/2) orbitals in neutron-rich Ti isotopes is not large enough to result in an N = 34 shell gap. However, comparisons between the Ti-55 data and the calculations argue for the presence of a sizable N = 34 gap in Ca-54. (C) 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)135-140
Number of pages6
JournalPhysics Letters B
Volume650
Issue number2-3
DOIs
Publication statusPublished - 28 Jun 2007

Keywords

  • COINCIDENCE DATA SETS
  • NEUTRON-RICH NUCLEI
  • CR ISOTOPES
  • FUSION
  • N=32

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