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Studies of neutron-deficient mendelevium isotopes at SHIP

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Abstract

The radioactive decay of the isotopes 247Md , 246Md and their daughter products was investigated by means of \( \alpha\) -\( \alpha\) and \( \alpha\) -\( \gamma\) coincidence spectroscopy. The isotopes were produced using the fusion reaction 40Ar$ + $209Bi. Decay schemes are suggested for 247Md and 243Es . A new isomeric state in 246Md with a half-life of ( 4.4±0.8 s was observed. Previous data of electron-capture delayed fission of 246Md and 242Es were confirmed. The probability for this decay branch in 246Md was measured to be P ECDF > 0.10 . The probability for electron-capture delayed fission in the case of 242Es was determined to be P ECDF = 0.013+0.012 -0.007 .

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Authors and Affiliations

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

    S. Antalic & Š. Šáro

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

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

  3. Institut für Kernphysik, Goethe-Universität, 60054, Frankfurt am Main, Germany

    S. Hofmann

  4. Centre for Underground Physics in Pyhäsalmi (CUPP), University of Oulu, 90014, Oulu, Finland

    P. Kuusiniemi

  5. Department of Physics, University of Jyväskylä, 40361, Jyväskylä, Finland

    M. Leino

Authors
  1. S. Antalic
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  2. F. P. Heßberger
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  3. S. Hofmann
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  4. D. Ackermann
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  5. S. Heinz
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  6. B. Kindler
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  7. I. Kojouharov
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  8. P. Kuusiniemi
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  9. M. Leino
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  10. B. Lommel
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  11. R. Mann
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  12. Š. Šáro
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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., Hofmann, S. et al. Studies of neutron-deficient mendelevium isotopes at SHIP. Eur. Phys. J. A 43, 35 (2010). https://doi.org/10.1140/epja/i2009-10896-0

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  • DOI: https://doi.org/10.1140/epja/i2009-10896-0

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