Abstract
The magnetic hyperfine splitting frequenciesν M=¦gμ NBHF/h.¦ of the 11/2− isomeric states129mXe (T1/2=8.9d) and131mXe (T1/2=11.8d) in Fe were measured with nuclear magnetic resonance on oriented nuclei at temperatures of 10–15 mK as 188.0(1) MHz and 209.8(1) MHz, respectively, the samples being prepared with the technique of recoil implantation after (α, x n) reactions. The magnetic moments of129mXe and131mXe are deduced to be (−)0.8914(6)μ N and (−)0.9943(6)μ N, respectively. The missing γ-anisotropies for allγ-transitions following the decay of 36.4d 127Xe indicateI=1/2 for the ground state spin of127Xe.
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Work supported by the Bundesministerium für Forschung und Technologie, Bonn, and, partly, by the Kernforschungszentrum, Karlsruhe
We want to thank Prof. H.J. Körner for his interest and support of this work and Prof. P. Herzog for discussions. We also want to thank Dr. H. Schweickert and K. Assmus for the alpha irradiations.