Spectroscopy of the N = Z-2 nucleus Cr-46 and mirror energy differences


Garrett P. E. , Lenzi S. M. , Algin E., Appelbe D., Bauer R. W. , Becker J. A. , ...More

PHYSICAL REVIEW C, vol.75, no.1, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 75 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1103/physrevc.75.014307
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Eskisehir Osmangazi University Affiliated: No

Abstract

Excited states in Cr-46 were sought using the C-12(Ar-36,2n) reaction. Gamma rays were detected with the Gammasphere array, and the Z value of the reaction products was determined with an ionization chamber located at the focal plane of the Fragment Mass Analyzer. In addition to the ground-state band observed up to I-pi=10(+) (tentatively 12(+)), five states are proposed to belong to the 3(-) band. The mirror energy differences with the analog states in Ti-46 present a pronounced staggering effect between the odd and even spin members that is reproduced well by shell-model calculations incorporating the different Coulomb contributions, monopole, multipole, and single-particle effects together with an isospin-nonconserving interaction that accounts for the so-called J=2 anomaly. Dramatically different E1 decay patterns for members of the 3(-) band between the Cr-46 and Ti-46 mirrors are also observed.