New evidence for a subshell gap at N=32

Autor: Matthew W. Cooper, P. F. Mantica, D. E. Groh, D. W. Anthony, B. A. Brown, A. M. Oros-Peusquens, A. Komives, P. A. Lofy, A. Garcia, W. Kumarasiri, J. I. Prisciandaro, M. Wiedeking, Samuel Tabor
Rok vydání: 2001
Předmět:
Zdroj: Physics Letters B. 510:17-23
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)00565-2
Popis: An 879.9(2) keV γ -ray transition has been identified following the β decay of 58 V and assigned as the 2 + 1 →0 + 1 transition in 58 Cr 34 . A peak in the energies of the first excited 2 + states for the even–even chromium isotopes is now evident at 56 Cr 32 , 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 π 1 f 7/2 – ν 1 f 5/2 monopole proton–neutron interaction as protons are removed from the 1 f 7/2 single-particle orbital.
Databáze: OpenAIRE