Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-11-24
Phys.Rev.C82:064311,2010
Physics
Nuclear Physics
Nuclear Experiment
13 pagers, 19 figures, accepted by Physical Review C
Scientific paper
10.1103/PhysRevC.82.064311
Measurements of the ground-state nuclear spins, magnetic and quadrupole moments of the copper isotopes from 61Cu up to 75Cu are reported. The experiments were performed at the ISOLDE facility, using the technique of collinear laser spectroscopy. The trend in the magnetic moments between the N=28 and N=50 shell closures is reasonably reproduced by large-scale shell-model calculations starting from a 56Ni core. The quadrupole moments reveal a strong polarization of the underlying Ni core when the neutron shell is opened, which is however strongly reduced at N=40 due to the parity change between the $pf$ and $g$ orbits. No enhanced core polarization is seen beyond N=40. Deviations between measured and calculated moments are attributed to the softness of the 56Ni core and weakening of the Z=28 and N=28 shell gaps.
Avgoulea M.
Billowes J.
Bissell Mark L.
Blaum Klaus
Brown Alex B.
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