In-beam gamma-ray spectroscopy of very neutron-rich nuclei: excited states in 46S and 48Ar.
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.
Gade
A
A
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
Adrich
P
P
Bazin
D
D
Brown
B A
BA
Cook
J M
JM
Diget
C Aa
CA
Glasmacher
T
T
McDaniel
S
S
Ratkiewicz
A
A
Siwek
K
K
Weisshaar
D
D