High-spin states in '".'*Se have been extended up to spin 14+ and 28+, respectively. The yrast bands in both nuclei exhibit a very regular rotational pattern up to the highest spins observed, with no indication of band crossings above ho ~0 . 5MeV. According to deformed shell model calculations the regular yrast structures can be associated with aligned configurations involving four g, , , quasiparticles.

No abstract

No abstract

No abstract

High spin slates in the doubly odd nucleus V2Br were investigated via the reaction 58Ni(~60, pn) at 52 65 MeV beam energy. A multi-element detector system consisting of ten Compton supressed Ge detectors (OSIRIS) and two NE213 neutron detectors was used to establish the yrast bands up to 5 MeV excitation energy and probable spins of 15 + resp. 14-. The lifetimes of 12 states and lifetime limits of four states were measured with the recoil distance method, among them four 0.5-3.1 ns isomers. Doppler broadened line shapes obtained in an additional 7 y-coincidence experiment via the reaction 4~ 3 pn) at 125 MeV revealed further lifetimes and (very short) side feeding times. Three rotational bands were established with deformation parameters I/~2[~0.3 and moment of inertia parameters f/h z = 36 MeV-1 (K ~ = 1 -) resp. 23 MeV-1 ; their quasi-particle configurations are being discussed.Nuclear Reactions: SSNi(160, pn) 72Br, E = 52-65 MeV, measured E~, I~, n7 coincidences, Y7 coincidences, n77 coincidences, recoil distance. 4~ 3pn) 72Br, E= 125 MeV, measured y?, coincidences, DSA lineshapes. Deduced level energies, branching ratios, lifetimes and electromagnetic transition strengths.