In-beam gamma-ray spectroscopy of very neutron-rich nuclei: Excited states in 46S and 48Ar

Authors :: Gade, A.
Adrich, P.
Bazin, D.
Brown, B. A.
Cook, J. M.
Diget, C. Aa.
Glasmacher, T.
McDaniel, S.
Ratkiewicz, A.
Siwek, K.
Weisshaar, D.
Source :: Phys.Rev.Lett.102:182502,2009
Publication Year :: 2009
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.<br />Comment: accepted for publication in Phys. Rev. Lett

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