High-lying, non-yrast shell structure in Ti52

S. Zhu, R. V. F. Janssens, B. Fornal, S. J. Freeman, M. Honma, R. Broda, M. P. Carpenter, A. N. Deacon, E. Jackson, B. P. Kay, T. Lauritsen, C. J. Lister, P. F. Mantica, T. Otsuka, D. Seweryniak, J. F. Smith, D. Steppenbeck, and X. Wang
Phys. Rev. C 80, 024318 – Published 31 August 2009

Abstract

Gamma rays from Ti52 have been studied with Gammasphere and the Fragment Mass Analyzer using reactions induced by a Ca48 beam on a Be9 target. The data have been used in combination with information from deep-inelastic reactions of Ca48 beams on a thick U238 target at an energy about 25% above the Coulomb barrier. The Ti52 level scheme was expanded considerably, and the lifetimes of some of the identified states were determined for the first time. The excitation of two protons and two neutrons outside the Ca48 core provide new tests of effective interactions in the full pf-shell model space. The positive-parity states in Ti52 were compared to theoretical predictions obtained with the GXPF1A, FPD6, and KB3G effective interactions. The comparisons favor, to a degree, the results computed with the GXPF1A interaction.

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  • Received 3 July 2009

DOI:https://doi.org/10.1103/PhysRevC.80.024318

©2009 American Physical Society

Authors & Affiliations

S. Zhu1, R. V. F. Janssens1, B. Fornal2, S. J. Freeman3, M. Honma4, R. Broda2, M. P. Carpenter1, A. N. Deacon3, E. Jackson1,*, B. P. Kay3,†, T. Lauritsen1, C. J. Lister1, P. F. Mantica5,6, T. Otsuka7,8, D. Seweryniak1, J. F. Smith3,‡, D. Steppenbeck3,§, and X. Wang1,9,∥

  • 1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Cracow, Poland
  • 3School of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
  • 4Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
  • 5National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 6Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
  • 7Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan
  • 8RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan
  • 9Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA

  • *Present address: University of Massachusetts, Lowell, Massachusetts 01854, USA.
  • Present address: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Present address: School of Engineering and Science, University of Paisley, Paisley PA1 2BE, UK.
  • §Present address: RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Present address: Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.

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Vol. 80, Iss. 2 — August 2009

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