{alpha} Decay of {sup 109}I and Its Implications for the Proton Decay of {sup 105}Sb and the Astrophysical Rapid Proton-Capture Process
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States)
- UNIRIB, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831 (United States)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
- Department of Physics and Astronomy, Mississippi State University, Mississippi 39762 (United States)
- Joint Institute for Heavy-Ion Reactions, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, University of Liverpool, Liverpool, L69 7ZE (United Kingdom)
An {alpha}-decay branch of (1.4{+-}0.4)x10{sup -4} has been discovered in the decay of {sup 109}I, which predominantly decays via proton emission. The measured Q{sub {alpha}} value of 3918{+-}21 keV allows the indirect determination of the Q value for proton emission from {sup 105}Sb 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 {sup 105}Sn(p,{gamma}){sup 106}Sb(p,{gamma}){sup 107}Te({alpha}decay){sup 103}Sn cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a {sup 103}Sn(p,{gamma}){sup 104}Sb(p,{gamma}){sup 105}Te({alpha}decay){sup 101}Sn) cycle.
- OSTI ID:
- 20951395
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.98.212501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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