New bands and spin-parity assignments in 111Ru

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 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.PACS: 23.20.Lv transitions and level energies - 21.60.Cs Shell model - 25.85.Ca Spontaneous fission - 27.60. + j