The 3701 keV neutron g9/2 single-particle state in 57Ni
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
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.
21.10.Hw Spin, parity, and isobaric spin - 21.60.Cs Shell model - 23.20.En Angular distributions and correlation measurement - 27.40.+z