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New evidence for a subshell gap at N=32 |
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| Authors: | J. I. Prisciandaro P. F. Mantica B. A. Brown D. W. Anthony M. W. Cooper A. Garcia D. E. Groh A. Komives W. Kumarasiri P. A. Lofy A. M. Oros-Peusquens S. L. Tabor M. Wiedeking |
| Affiliation: | a Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA b National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA c Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA d Department of Physics, Florida State University, Tallahassee, FL 32306, USA e Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA |
| Abstract: | An 879.9(2) keV γ-ray transition has been identified following the β decay of 58V and assigned as the 2+1→0+1 transition in 58Cr34. A peak in the energies of the first excited 2+ states for the even–even chromium isotopes is now evident at 56Cr32, providing empirical evidence for a significant subshell gap at N=32. The appearance of this neutron subshell closure for neutron-rich nuclides may be attributed to the diminished π1f7/2–ν1f5/2 monopole proton–neutron interaction as protons are removed from the 1f7/2 single-particle orbital. |
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