Ground-state proton decay of 69Br and implications for the rp-process 68Se waiting-point

Details Ground-state proton decay of 69Br and implications for the rp-process 68Se waiting-point Ground-state proton decay of 69Br and implications for the rp-process 68Se waiting-point

2010-09-15

arxiv.org/abs/1009.2950v1

J.Phys.Conf.Ser.312:042020,2011

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 6 figures, INPC 2010 conference proceedings

Scientific paper

10.1088/1742-6596/312/4/042020

The first direct measurement of the proton separation energy, Sp, for the proton-unbound nucleus 69Br is reported. Of interest is the exponential dependence of the 2p-capture rate on Sp 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 Sp is explored within the context of a single-zone X-ray burst model.

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