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Alpha decay of 109I and its implications for the proton decay of 105Sb and the astrophysical rapid proton-capture process
- Source :
- Physical review letters. 98(21)
- Publication Year :
- 2007
-
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.
Details
- ISSN :
- 00319007
- Volume :
- 98
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.pmid..........9e8c263fbf0d09a3ba9fe2d16427615a