On the Alpha Decay of 109I and Its Implications for the Proton Decay of 105Sb
In an experiment at the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility, the very small -decay branch of {sup 109}I, b = (1.4{+-}0.4) x 10{sup -4}, has been measured. The Q-value for this transition allowed for the determination of Qp({sup 105}Sb) = 356{+-}22 keV, about 130 keV lower than previously claimed. This difference increases the partial half-life for proton decay by several orders of magnitude, making the probability of observing direct proton decay of {sup 105}Sb very small, much below any previous experimental limit. The results and consequences for the astrophysical rp-process are discussed.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 932117
- Resource Relation:
- Journal Volume: 961; Conference: International Conference on Proton Emitting Nuclei and Related Topics (PROCON 07) - Lisbon, , Portugal - 6/18/2007 12:00:00 AM-6/22/2007 12:00:00 AM
- Country of Publication:
- United States
- Language:
- English
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