2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 6, 377-380

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 $\gamma$ 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 $39 \leq A \leq 58$


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