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    Phys Rev Lett. 2007 May 25;98(21):212501. Epub 2007 May 23.

    Alpha decay of 109I and its implications for the proton decay of 105Sb and the astrophysical rapid proton-capture process.

    Mazzocchi C, Grzywacz R, Liddick SN, Rykaczewski KP, Schatz H, Batchelder JC, Bingham CR, Gross CJ, Hamilton JH, Hwang JK, Ilyushkin S, Korgul A, Królas W, Li K, Page RD, Simpson D, Winger JA.

    Source

    Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.

    Abstract

    An alpha-decay branch of (1.4+/-0.4) x 10(-4) has been discovered in the decay of 109I, which predominantly decays via proton emission. The measured Q(alpha) value of 3918+/-21 keV allows the indirect determination of the Q value for proton emission from 105Sb of 356+/-22 keV, which is approximately of 130 keV more bound than previously reported. This result is relevant for the astrophysical rapid proton-capture process, which would terminate in the 105Sn(p,gamma)106Sb(p,gamma)107Te(alpha decay)103Sn cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a 103Sn(p,gamma)104Sb(p,gamma)105Te(alpha decay)101Sn) cycle.

    PMID:
    17677769
    [PubMed]

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