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arXiv · 2406.16823

Characterization of isomers produced by the spontaneous fission of ${}^{252}$Cf with the VESPA setup

V. Piau·A. Göök·S. Oberstedt·A. Oberstedt·A. Chebboubi·O. Litaize·M. Vidali
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Abstract

Isomers produced by spontaneous fission of ${}^{252}$Cf have been measured with the VESPA setup, composed of LaBr$_3$(Ce) detectors for fast $\gamma$-ray spectroscopy and an ionization chamber for detecting fission fragments. Identification of the isomers was derived from fission fragment-$\gamma$-$\gamma$ coincidences. This paper presents the half-life of 34 isomeric states measured with this setup, from less than the nanosecond up to tens of microseconds. Two of these isomers are reported for the first time, in ${}^{108}$Tc and ${}^{147}$Ce. In addition to this half-life analysis, the isomers are used to develop and test a nuclear charge calibration of the ionization chamber.

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V. Piau, A. Göök, S. Oberstedt, A. Oberstedt, A. Chebboubi, O. Litaize, M. Vidali. 2024-06-24. Characterization of isomers produced by the spontaneous fission of ${}^{252}$Cf with the VESPA setup. https://doi.org/10.1140/epja/s10050-024-01470-9

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