An α-decay branch of (1.4±0.4)×10-4 has been discovered in the decay of 109I, which predominantly decays via proton emission. The measured Qα 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,γ)106Sb(p,γ)107Te(α decay)103Sn cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a 103Sn(p,γ)104Sb(p,γ)105Te(α decay)101Sn) cycle.
|Titolo:||α decay of 109I and its implications for the proton decay of 105Sb and the astro-physical rapid proton-capture process|
|Autori interni:||MAZZOCCHI, CHIARA|
|Data di pubblicazione:||25-mag-2007|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.98.212501|
|Appare nelle tipologie:||01 - Articolo su periodico|