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Identification of new mendelevium and einsteinium isotopes in bombardments of209Bi with40Ar

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The four new neutron deficient isotopes246Md (T1/2=(1.0±0.4) s),245Md (T1/2=(0.35 +0.23−0.16 ) s),242Es (T1/2=(16 +6−4 ) s) and241Es(T1/2=(8 +6−4 ) s) were produced in fusion reactions of40Ar ions with209Bi targets at bombarding energies of E p =4.78, 4.93 and 5.12 A*MeV. The assignment was based on evaporation residue-α-α time and position correlations. A spontaneous fission activity of T1/2=(0.90±0.25) ms was observed at a projectile energy of E p =5.12 A*MeV and assigned to245Md.

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Authors and Affiliations

  1. Gesellschaft für Schwerionenforschung mbH, D-64220, Darmstadt, Germany

    V. Ninov, F. P. Heßberger, S. Hofmann, H. Folger, G. Münzenberg & P. Armbruster

  2. Flerov Laboratory of Nuclear Reactions, JINR, 141 980, Dubna, Russia

    A. V. Yeremin & A. G. Popeko

  3. Department of Physics, University of Jyväskylä, FIN-40351, Jyväskylä, Finland

    M. Leino

  4. Department of Nuclear Physics, Comenius University, SK-84215, Bratislava, Slovakia

    S. Saro

Authors
  1. V. Ninov
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  2. F. P. Heßberger
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  3. S. Hofmann
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  4. H. Folger
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  5. G. Münzenberg
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  6. P. Armbruster
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  7. A. V. Yeremin
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  8. A. G. Popeko
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  9. M. Leino
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  10. S. Saro
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Additional information

Communicated by V. Metag

This article was processed by the author using the LATEX style filepljour2 from Springer-Verlag.

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Ninov, V., Heßberger, F.P., Hofmann, S. et al. Identification of new mendelevium and einsteinium isotopes in bombardments of209Bi with40Ar. Z. Physik A - Hadrons and Nuclei 356, 11–12 (1996). https://doi.org/10.1007/s002180050141

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  • DOI: https://doi.org/10.1007/s002180050141

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