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

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, Sam L. Tabor and Piet Van Duppen
Additional contact information
Ivan Mukha: Gesellschaft für Schwerionenforschung
Ernst Roeckl: Gesellschaft für Schwerionenforschung
Leonid Batist: St Petersburg Nuclear Physics Institute
Andrey Blazhev: Gesellschaft für Schwerionenforschung
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

Nature, 2006, vol. 439, issue 7074, 298-302

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.

Date: 2006
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DOI: 10.1038/nature04453

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