# New pathway to bypass the $^{15}$O waiting point

Abstract : Two reactions $^{15}$O(p,$\beta^{+}$)$^{16}$O and $^{15}$O(p,$\gamma)(\beta^{+}$)$^{16}$O are presented as new paths to bypass the $^{15}$O waiting point in the CNO cycles. Precise measurements of the ground and excited states in $^{16}$F, obtained using H($^{15}$O,p)$^{15}$O reaction, were used to calculate the cross sections. Surprisingly the second reaction has a cross section $\simeq$ 10$^{10}$ times larger. This can be understood to arise from the more effective feeding of the low energy wing of the ground state resonance. The implications of the latter reaction in novae explosions and x-ray bursts sites is discussed.
Type de document :
Communication dans un congrès

http://hal.in2p3.fr/in2p3-00025827
Contributeur : Michel Lion <>
Soumis le : vendredi 19 janvier 2007 - 10:34:45
Dernière modification le : mardi 2 avril 2019 - 01:36:24

### Citation

I. Stefan, F. de Oliveira Santos, M.G. Pellegriti, M. Angélique, J.C. Dalouzy, et al.. New pathway to bypass the $^{15}$O waiting point. TOURS 2006, Tours Symposium on Nuclear Physics VI, Sep 2006, Tours, France. pp.155-163, ⟨10.1063/1.2713512⟩. ⟨in2p3-00025827⟩

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