Alpha Decay of 109I, on Its Implications for the Proton Decay of 105Sb and for the Astrophysical Rapid Proton-Capture Process
- University of Tennessee, Knoxville (UTK)
- Oak Ridge Associated Universities (ORAU)
- ORNL
- Michigan State University, East Lansing
- Vanderbilt University
- Mississippi State University (MSU)
- Joint Institute for Heavy Ion Research, Oak Ridge
- University of Liverpool
- University of Tennessee, Knoxville (UTK) and East Tennessee State University
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 932018
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 21; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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On the alpha decay of {sup 109}I and its implications for the proton decay of {sup 105}Sb
On the Alpha Decay of 109I and Its Implications for the Proton Decay of 105Sb