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

A Gade; P Adrich; D Bazin; B A Brown; J M Cook; C Aa Diget; T Glasmacher; S McDaniel; A Ratkiewicz; K Siwek; D Weisshaar

doi:10.1103/PhysRevLett.102.182502

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

Phys Rev Lett. 2009 May 8;102(18):182502. doi: 10.1103/PhysRevLett.102.182502. Epub 2009 May 7.

Authors

A Gade¹, P Adrich, D Bazin, B A Brown, J M Cook, C Aa Diget, T Glasmacher, S McDaniel, A Ratkiewicz, K Siwek, D Weisshaar

Affiliation

¹ National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.

PMID: 19518865
DOI: 10.1103/PhysRevLett.102.182502

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 midtarget energy and 9Be(48Ca,46Cl)X followed by 9Be(46Cl,46S+gamma)X at 87.0 MeV/u midtarget energy, respectively. The results are compared to large-scale shell-model calculations in the sd-pf shell using the SDPF-NR effective interaction and Z-dependent modifications.