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Proton–proton correlations observed in two-proton radioactivity of 94Ag

Author

Listed:
  • Ivan Mukha

    (Gesellschaft für Schwerionenforschung
    KU Leuven
    Kurchatov Institute
    University of Seville)

  • Ernst Roeckl

    (Gesellschaft für Schwerionenforschung)

  • Leonid Batist

    (St Petersburg Nuclear Physics Institute)

  • Andrey Blazhev

    (Gesellschaft für Schwerionenforschung
    University of Sofia)

  • Joachim Döring

    (Gesellschaft für Schwerionenforschung)

  • Hubert Grawe

    (Gesellschaft für Schwerionenforschung)

  • Leonid Grigorenko

    (JINR)

  • Mark Huyse

    (KU Leuven)

  • Zenon Janas

    (Warsaw University)

  • Reinhard Kirchner

    (Gesellschaft für Schwerionenforschung)

  • Marco La Commara

    (Università “Federico II” and INFN Napoli)

  • Chiara Mazzocchi

    (Gesellschaft für Schwerionenforschung)

  • Sam L. Tabor

    (Florida State University)

  • Piet Van Duppen

    (KU Leuven)

Abstract

Going for silver A previously unknown type of radioactive decay behaviour has been identified in an exotic silver isotope. The silver-94 atom sheds protons by both one- and two-proton decay. Nuclei with an unusually high proportion of protons can decay by emitting individual protons, a reaction first seen in 1982 in lutetium-151; twenty years later, proton-rich isotopes of iron and zinc were found to decay by the simultaneous emission of two protons. 94Ag adopts both decay modes: single-proton emission, reported in 2005, results in a palladium isotope (93Pd); and two-proton emission has now been observed, resulting in an isotope of rhodium (92Rh). Single protons are ejected preferentially from the ‘tips’ of the cigar-shaped molecule. In the case of two-proton decay, the two particles can emerge either both from the same tip, or one from each end.

Suggested Citation

  • Ivan Mukha & Ernst Roeckl & Leonid Batist & Andrey Blazhev & Joachim Döring & Hubert Grawe & Leonid Grigorenko & Mark Huyse & Zenon Janas & Reinhard Kirchner & Marco La Commara & Chiara Mazzocchi & Sa, 2006. "Proton–proton correlations observed in two-proton radioactivity of 94Ag," Nature, Nature, vol. 439(7074), pages 298-302, January.
    • Handle: RePEc:nat:nature:v:439:y:2006:i:7074:d:10.1038_nature04453
    DOI: 10.1038/nature04453
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