Abstract. The transient-field technique has been used to measure g factors of excited states in ⁸²Sr and ⁸⁴Sr populated in the reactions ¹²C(^{72, 74}Ge, 2n) at 215 MeV. The nuclei recoiled through a 6 mu m iron foil and the nuclear precessions were deduced from the rotations of the gamma -ray angular distributions observed by four Ge(Li) detectors. The feeding time to discrete states in the vicinity of the first backbend, determined by lineshape analysis of some of the gamma -ray transitions was sufficiently short to allow g-factor determinations for these states. Large positive g factors of the 8₂⁺ and 10₂⁺ states in both ⁸²Sr and ⁸⁴Sr indicate proton g_9/2 quasiparticle alignment. The lifetime of the 8₁⁺ state in ⁸²Sr was measured as tau _m=1.1(2) ps.

Print publication: Issue 7 (July 1989)