In-beam gamma-ray spectroscopy of very neutron-rich nuclei: Excited states in 46S and 48Ar
nucl-ex
/ Authors
A. Gade, P. Adrich, D. Bazin, B. A. Brown, J. M. Cook, C. Aa. Diget, T. Glasmacher, S. McDaniel, A. Ratkiewicz, K. Siwek
and 1 more author
/ Abstract
We report on the first in-beam gamma-ray spectroscopy study of the very neutron-rich nucleus 46S. The N=30 isotones 46S and 48Ar were produced in a novel way in two steps that both necessarily involve nucleon exchange and neutron pickup reactions, 9Be(48Ca,48K)X followed by 9Be(48K,48Ar+gamma)X at 85.7 MeV/u mid-target energy and 9Be(48Ca,46Cl)X followed by 9Be(46Cl,46S+gamma)X at 87.0 MeV/u mid-target energy, respectively. The results are compared to large-scale shell-model calculations in the sdpf shell using the SDPF-NR effective interaction and Z-dependent modifications.