Abstract
The decay191Hg→191Au was investigated by measuring γ-ray spectra, conversion electron spectra, and coincidence spectra, as well as lifetimes in the second region. The parent isotope191Hg was produced by the reaction197Au (d, 8n) withE d =80 MeV. About 80 γ-transitions of this decay were observed. Multipolarities of the more intense transitions were determined. An isomeric state of 0.92±0.11 s half-life was found in191Au. A level scheme for191Au is suggested. The measured γ-transitions are attributed to the decay of a 13/2+ isomeric state of191Hg; its half-life was found to be 50.8 ±1.5 min. The core excitation model was used to discuss some features of the level structure in191Au.
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The cooperation of the members of the cyclotron group during the numerous irradiations is gratefully acknowledged. Furthermore, we want to thank Mr. H. Jäger for his continuous help during the course of the experiments.
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Beuscher, H., Jahn, P., Lieder, R.M. et al. Electron capture decay of 51 min191Hg. Z. Physik 247, 383–399 (1971). https://doi.org/10.1007/BF01395338
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DOI: https://doi.org/10.1007/BF01395338