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Nuclear isomers in 259Sg and 255Rf

  • Regular Article - Experimental Physics
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Abstract

The production and radioactive decay of 259Sg and its daughter products were investigated using α-decay spectroscopy and spontaneous-fission measurements. The isotope was produced in the fusion-evaporation reaction 206Pb(54Cr, 1n)259Sg. This work presents first results for isomeric states in the isotopes 259Sg and 255Rf. In addition new results for spontaneous-fission properties and branching ratios of both isotopes are discussed. The new decay-spectroscopy data allowed extending the single-particle systematics of isotones with 151 and 153 neutrons. A change of the ground-state configuration in N = 153 isotones from 1/2+[620] to 11/2−[725] was observed for the first time.

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Authors and Affiliations

  1. Department of Nuclear Physics and Biophysics, Comenius University, 84248, Bratislava, Slovakia

    S. Antalic

  2. GSI-Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany

    F. P. Heßberger, D. Ackermann, S. Heinz, S. Hofmann, B. Kindler, J. Khuyagbaatar, B. Lommel & R. Mann

  3. Helmholtz Institut Mainz, 55099, Mainz, Germany

    F. P. Heßberger & J. Khuyagbaatar

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  1. S. Antalic
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  2. F. P. Heßberger
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Correspondence to S. Antalic.

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Communicated by R. Krücken

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Antalic, S., Heßberger, F.P., Ackermann, D. et al. Nuclear isomers in 259Sg and 255Rf. Eur. Phys. J. A 51, 41 (2015). https://doi.org/10.1140/epja/i2015-15041-0

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  • DOI: https://doi.org/10.1140/epja/i2015-15041-0

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