α Decay of I109 and Its Implications for the Proton Decay of Sb105 and the Astrophysical Rapid Proton-Capture Process

Details α Decay of I109 and Its Implications for the Proton Decay of Sb105 and the Astrophysical Rapid Proton-Capture Process α Decay of I109 and Its Implications for the Proton Decay of Sb105 and the Astrophysical Rapid Proton-Capture Process

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvl..98u2501m&link_type=abstract

Physical Review Letters, vol. 98, Issue 21, id. 212501

Astronomy and Astrophysics

Astrophysics

17

Alpha Decay, Binding Energies And Masses, Decay By Proton Emission, 90<=A<=149

Scientific paper

An α-decay branch of (1.4±0.4)×10-4 has been discovered in the decay of I109, which predominantly decays via proton emission. The measured Qα value of 3918±21keV allows the indirect determination of the Q value for proton emission from Sb105 of 356±22keV, 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 Sn105(p,γ)Sb106(p,γ)Te107(αdecay)Sn103 cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a Sn103(p,γ)Sb104(p,γ)Te105(αdecay)Sn101) cycle.

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