New pathway to bypass the 15O waiting point

Details New pathway to bypass the 15O waiting point New pathway to bypass the 15O waiting point

2006-03-22

arxiv.org/abs/nucl-ex/0603020v3

AIP Conf.Proc.891:155-163,2007

Physics

Nuclear Physics

Nuclear Experiment

submitted

Scientific paper

10.1063/1.2713512

We propose the sequential reaction process $^{15}$O($p$,$\gamma)(\beta^{+}$)$^{16}$O as a new pathway to bypass of the $^{15}$O waiting point. This exotic reaction is found to have a surprisingly high cross section, approximately 10$^{10}$ times higher than the $^{15}$O($p$,$\beta^{+}$)$^{16}$O. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound $^{16}$F low lying states, obtained using the H($^{15}$O,p)$^{15}$O reaction. The large $(p,\gamma)(\beta^{+})$ cross section can be understood to arise from the more efficient feeding of the low energy wing of the ground state resonance by the gamma decay. The implications of the new reaction in novae explosions and X-ray bursts are discussed.

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