Open AccessYrast structure of the neutron-richN = 31 Ca 51
Author(s) -
B. Fornal,
R. V. F. Janssens,
R. Broda,
N. Mărginean,
S. Beghini,
L. Corradi,
M. P. Carpenter,
G. de Angelis,
F. Della Vedova,
E. Farnea,
E. Fioretto,
A. Gadea,
B. Guiot,
Mareki Honma,
W. Królas,
T. Lauritsen,
S. Lunardi,
P. F. Mantica,
Paolo Mason,
G. Montagnoli,
D. R. Napoli,
T. Otsuka,
T. Pawłat,
G. Pollarolo,
F. Scarlassara,
A. M. Stefanini,
D. Seweryniak,
S. Szilner,
C. A. Ur,
M. Trotta,
J.J. Valiente-Dobón,
J. Wrzesiński,
S. Zhu
Publication year - 2008
Publication title -
physical review c
Language(s) - English
Resource type - Journals
eISSN - 1089-490X
pISSN - 0556-2813
DOI - 10.1103/physrevc.77.014304
Subject(s) - yrast , physics , neutron , nuclear physics
The low-lying yrast states in the 51Ca and 52Sc nuclei were investigated to obtain information on the evolution of the p1/2 and f5/2 neutron single-particle orbitals in neutron-rich nuclei near proton number Z=20. Level structures associated with neutron excitations into these two orbitals and with proton excitations across the Z=20 shell gap were identified. Shell-model calculations with the recently proposed GXPF1A interaction account reasonably well for the fp-shell states. The energy separation between the νp1/2 and νf5/2 orbitals in the Ca isotopes appears to be overestimated by the GXPF1A Hamiltonian
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