Abstract
Gamma spectrum and half life of131Sn decay have been measured using the unslowed fission fragment separator Lohengrin at the high flux reactor of the Institute Laue-Langevin, Grenoble. Two beta-decaying isomers are evidenced, with half-lives of 39±2 s and 50±2 s. Additional confirmation of this isomerism is given by fission fragment-γ delayed coincidence, leading to a partial level scheme of131Sb including an isomeric level of 50±8 μs life-time at 1676.6 keV.
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The author wish to express their gratitude to Professor A. Moussa for very helpful discussions. They would also like to thank the Lohengrin team from the Institut Laue-Langevin from Grenoble for the efficient maintenance of the experimental facilities.
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Schussler, F., Blachot, J., Bocquet, J.P. et al. A new beta decaying isomer of131Sn; partial level scheme of131Sb. Z Physik A 281, 229–232 (1977). https://doi.org/10.1007/BF01408841
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DOI: https://doi.org/10.1007/BF01408841