Lifetime and linear polarisation measurements with the⁸⁰Kr( ,n )⁸³Sr and⁸²Kr( ,n )⁸⁵Sr reactions

Abstract

Mean lifetimes of 83Sr, 84Sr and 85Sr levels have been measured by DSAM. The reactions used were (α,nγ) and (α, 2nγ) with solid krypton targets. Angular distribution and linear polarisation measurements yielded several multipole mixing ratios and Jπ assignments. The Jπ of the 4.9 h isomer in 85Y is shown to be 2/9+.