Excited states built on the 6[sup [minus]] isomer in [sub 37][sup 86]Rb[sub 49]

High-spin states of the doubly-odd nucleus[sup 86]Rb containing 37 protons and 49 neutrons have been investigated via the reaction [sup 82]Se([sup 7]Li,3[ital n]) using [sup 7]Li ions with energies between 30 and 35 MeV. The new level scheme is based on prompt [gamma][gamma] coincidences, angular distributions and directional correlation orientation ratios of [gamma] rays as well as on linear polarizations of some strong [gamma] rays and contains levels with excitation energies up to 7.9 MeV and tentative spins up to 16[h bar]. For fifteen of the levels lifetimes in the ps region have been determined by analyzing the Doppler shift of [gamma] rays. Several fast [ital M]1 transitions with [ital B]([ital M]1)[approx gt]0.3W.u. have been identified. The new high-spin level scheme of [sup 86]Rb is interpreted on the basis of shell-model calculations in the configuration space 1[ital p][sub 3/2], 0[ital f][sub 5/2], 1[ital p][sub 1/2], and 0[ital g][sub 9/2] for the protons and 1[ital p][sub 1/2], 0[ital g][sub 9/2], and 1[ital d][sub 5/2] for the neutrons. The energies of the observed levels with [ital I][gt]5 as well as most of the observed electromagnetic transition probabilities could be well described. The excitation of a 0[ital g][sub 9/2] neutron over the [italmore » N]=50 shell gap into the [ital d][sub 5/2] orbital is predicted to cause remarkable alterations only for states with [ital I][sup [pi]][ge]15[sup +]. Some of the reduced [ital M]1 transition probabilities calculated within the shell model are found to depend critically on the parametrization used to describe the residual interaction.« less