New pathways to bypass the O-15 waiting point

I. Stefan, F. de Oliveira Santos, M. G. Pellegriti, M. Angelique, J. C. Dalouzy, F. de Grancey, M. Fadil, S. Grevy, M. Lenhardt, A. Lewitowicz, A. Navin, L. Perrot, M. G. Saint Laurent, I. Ray, O. Sorlin, C. Stodel, J. C. Thomas, G. Dumitru, A. Buta, R. BorceaF. Negoita, D. Pantelica, J. C. Angelique, E. Berthoumieux, A. Coc, J. Kiener, A. Lefebvre-Schuhl, V. Tatischeff, J. M. Daugas, O. Roig, T. Davinson, M. Stanoiu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Two reactions O-15(p,beta(+))O-16 and O-15(p,gamma)(beta(+))O-16 are proposed as new pathways to bypass the O-15 waiting point in astrophysical context. The later reaction is found to have a surprisingly high cross section, approximately 10(10) times higher than the first reaction. These cross sections were calculated after precise measurements of energies and widths of the proton-unbound F-16 low lying states, obtained using the H(O-15,p)O-15 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 reactions are discussed.
Original languageUndefined/Unknown
Title of host publicationTours Symposium on Nuclear Physics VI
EditorsM Arnould, M Lewitowicz, H Emling, H Akimune, M Ohta, H Utsunomiya, T Wada, T Yamagata
Number of pages9
Publication statusPublished - 2007

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