New bands and spin-parity assignments in 111Ru

W. Urban; T. Rzaca-Urban; Ch. Droste; S. G. Rohoziński; J. L. Durell; W. R. Phillips; A. G. Smith; B. J. Varley; N. Schulz; I. Ahmad; J. A. Pinston

doi:10.1140/epja/i2003-10234-8

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2004) 22: 231-239
https://doi.org/10.1140/epja/i2003-10234-8

New bands and spin-parity assignments in ¹¹¹Ru

W. Urban¹^*, T. Rzaca-Urban¹, Ch. Droste¹, S. G. Rohoziński¹, J. L. Durell², W. R. Phillips², A. G. Smith², B. J. Varley², N. Schulz³, I. Ahmad⁴ and J. A. Pinston⁵

¹ Faculty of Physics, Warsaw University, ul. Hoża 69, PL-00-681, Warsaw, Poland
² Schuster Laboratory, Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK
³ Institut de Recherches Subatomiques UMR7500, CNRS-IN2P3 et Université Louis Pasteur, F-67037, Strasbourg, France
⁴ Argonne National Laboratory, 60439, Argonne, IL, USA
⁵ Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS/Université Joseph Fourier, F-38026, Grenoble Cedex, France

^* e-mail: urban@fuw.edu.pl

Received: 8 July 2003
Accepted: 24 May 2004
Published online: 9 November 2004

Abstract

The ¹¹¹Ru nucleus, populated in the spontaneous fission of ²⁴⁸Cm has been studied by means of prompt gamma spectroscopy using the EUROGAM2 array. Spin and parity assignments, based on angular correlations, linear polarization, and conversion coefficient measurements differ from those available in the literature. New bands are reported, which incorporate γ transitions seen previously but not placed in the scheme of ¹¹¹Ru or placed incorrectly. The bands are interpreted as neutron excitations into subshells originating predominantly from the h _11/2, g _7/2 and s _1/2 spherical orbitals. The s _1/2 band, strongly mixed with the d _3/2, d _5/2 and g _7/2 configurations, is observed for the first time in this region.