Abstract
The lifetime of the first excited state in99Sr has been determined by the delayed γ-γ coincidence method. The value of t/2=0.58(9) ns corresponds to a deformation parameter ß=0.38(4). The deduced <sz> value confirms the previously proposed ν[411]3/2 Nilsson assignment for the99Sr ground state. In addition, lifetime values for the 2+ (t1/2=0.40(8) ns) and 0+ (t1/2=5.36(23) ns) states in100Zr are obtained, which deviate from older measurements and indicate a larger deformation of ß=0.39(4).
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It is a pleasure to thank Ove Jonsson for his kind help to keep the ISOLDE separator running at high Rb yields. This work was supported by the German Federal Minister for Research and Technology (BMFT) under contract number 06 MZ 552.
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Lhersonneau, G., Gabelmann, H., Kaffrell, N. et al. Lifetime measurements in99Sr and100Zr. Z. Physik A - Atomic Nuclei 332, 243–244 (1989). https://doi.org/10.1007/BF01289787
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DOI: https://doi.org/10.1007/BF01289787