Identification of high-spin states in neutron-rich 88,90,92Kr and 86Se

Level schemes of even–even neutron-rich 88-92Kr and 86Se have been investigated by measuring triple-γ coincidence data from the spontaneous fission of 252Cf with the Gammasphere detector array. The level scheme of 88Kr has been extended up to 7169 keV state. Several new excited states with new transitions have been identified in 90,92Kr and 86Se. Spins and parities have been assigned to levels in these nuclei by following regional systematics and angular correlation measurements. The level structures of the N = 52, 54, Se, Kr, and Sr isotones are discussed. (author)