Short note
The 3701 keV neutron g9/2 single-particle state in 57Ni
D. Rudolph1 - D. Weisshaar2 - F. Cristancho3,4 - J. Eberth2 - C. Fahlander1 - O. Iordanov3 - S. Skoda2 - Ch. Teich3 - O. Thelen2 - H.G. Thomas2
1 Department of Physics, Lund University, 22100 Lund, Sweden
2 Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
3 II. Physikalisches Institut, Universität Göttingen, 37073 Göttingen, Germany
4 Departamento de Física , Universidad Nacional de Colombia, Bogotá, Colombia
Received: 24 September 1999 / Revised version: 22 October 1999 Communicated by D. Schwalm
Abstract
The neutron g9/2 single-particle state in 57Ni
has been unambiguously identified in a combined measurement
of the linear polarization, angular distribution, and angular correlation of
rays following the fusion-evaporation reaction
28Si(32S,2pn)57Ni at a beam energy of 90 MeV.
The linear polarization was measured
with a EUROBALL cluster detector and a prototype of an encapsulated
six-fold segmented hexaconical Ge-detector.
The spin of the 3701 keV level in 57Ni was confirmed to be I=9/2 and
its parity determined to be positive.
PACS
21.10.Hw Spin, parity, and isobaric spin -
21.60.Cs Shell model -
23.20.En Angular distributions and correlation measurement -
27.40.+z
Copyright Springer-Verlag
