In an experiment at the Recoil Mass Spectrometer of the HRIBF at ORNL the alpha decay branch of 109I was discovered. The measurement of its decay energy allowed for the indirect determination of the proton separation energy in the daughter nucleus 105Sb. The deduced Sp( 105Sb)=-356(22) keV is about 130 keV larger than the previously claimed value. The consequences of this measurement for the astrophysical rp-process will be discussed.
Alpha decay of 109I and the implications for the rapid-proton capture process / C. Mazzocchi, R. Grzywacz, S.N. Liddick, K.P. Rykaczewski, H. Schatz, J.C. Batchelder, C.R. Bingham, L. Cartegni, C.J. Gross, J.H. Hamilton, J.K. Hwang, S. Ilyushkin, A. Korgul, W. Krolas, K. Li, R.D. Page, J.A. Winger. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - (2008), pp. 063-1-063-5. ((Intervento presentato al 10. convegno Symposium on nuclei in the cosmos tenutosi a Mackinac Island, Michigan, USA nel 2008.
Alpha decay of 109I and the implications for the rapid-proton capture process
C. Mazzocchi;
2008
Abstract
In an experiment at the Recoil Mass Spectrometer of the HRIBF at ORNL the alpha decay branch of 109I was discovered. The measurement of its decay energy allowed for the indirect determination of the proton separation energy in the daughter nucleus 105Sb. The deduced Sp( 105Sb)=-356(22) keV is about 130 keV larger than the previously claimed value. The consequences of this measurement for the astrophysical rp-process will be discussed.
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