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International Nuclear Physics Conference 2010, INPC2010, Vancouver : Canada (2010)
Ground-state proton decay of 69Br and implications for the rp-process 68Se waiting-point
A.M. Rogers, W.G. Lynch, M.A. Famiano, M.S. Wallace, F. Amorini, D. Bazin, R.J. Charity, F. Delaunay1, R.T. De Souza, J. Elson, A. Gade, D. Galaviz, S. Hudan, J. Lee, S. Lobostov, S. Lukyanov, M. Matoš, M. Mocko, M.B. Tsang, D.I. Shapira, L.G. Sobotka, G. Verde

The first direct measurement of the proton separation energy, S p, for the proton-unbound nucleus 69Br is reported. Of interest is the exponential dependence of the 2p-capture rate on S p which can bypass the 68Se waiting-point in the astrophysical rp process. An analysis of the observed proton decay spectrum is given in terms of the 69Se mirror nucleus and the influence of S p is explored within the context of a single-zone X-ray burst model.
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
Structure nucléaire
Physique/Physique Nucléaire Expérimentale
Capture rate – Direct measurement – Exponential dependence – Mirror nuclei – Proton decay – Separation energy – X-ray bursts