Evidence for an Isomeric 3/2- State in 53Co
Author
Summary, in English
The fragmentation of a 550MeV/u primary beam of Ni-58 on a Be-9 target has been used to measure time-and energy-correlated gamma decays following the implantation of event-by-event discriminated secondary fragments into a Be-9 stopper plate. A new isomeric gamma decay with T-1/2 = 14(6 4) ns and E-gamma = 646.2(2) keV is observed and attributed to the decay of the yrast 3/2-state in Co-53(27)26. This short-lived isomeric state has been populated by means of nuclear reactions during the stopping process of the secondary fragments. The experimental findings are discussed in the framework of large-scale spherical shell model calculations in conjunction with isospin symmetry-breaking residual interactions for the A = 53, Tz = +/- 1/2 mirror nuclei Co-53 and Fe-53.
Publishing year
2008
Language
English
Pages
131-138
Publication/Series
European Physical Journal A. Hadrons and Nuclei
Volume
36
Issue
2
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Status
Published
Project
- Isotope-selective Spectroscopy: Fast Timing R&D and fp-Shell Mirror Isomers
Research group
- Nuclear Structure
ISBN/ISSN/Other
- ISSN: 1434-6001