245 articles – 3648 Notices  [english version]
 HAL : in2p3-00132026, version 1
 arXiv : nucl-ex/0702034
 Nuclear Physics A 791 (2007) 251-266
 Indirect study of $^{19}$Ne states near the $^{18}$F+p threshold
 (2007)
 The early E $\leq$ 511 keV gamma-ray emission from novae depends critically on the $^{18}$F(p,$\alpha$)$^{15}$O reaction. Unfortunately the reaction rate of the $^{18}$F(p,$\alpha$)$^{15}$O reaction is still largely uncertain due to the unknown strengths of low-lying proton resonances near the $^{18}$F+p threshold which play an important role in the nova temperature regime. We report here our last results concerning the study of the d($^{18}$F,p)$^{19}$F($\alpha$)$^{15}$N transfer reaction. We show in particular that these two low-lying resonances cannot be neglected. These results are then used to perform a careful study of the remaining uncertainties associated to the $^{18}$F(p,$\alpha$)$^{15}$O and $^{18}F(p,$\gamma)$^{19}$Ne reaction rates.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Mot(s)-clé(s) : transfer reaction – radioactive beam – DWBA – spectroscopic factor – nova nucleosynthesis
 Lien vers le texte intégral : http://fr.arXiv.org/abs/nucl-ex/0702034
 in2p3-00132026, version 1 http://hal.in2p3.fr/in2p3-00132026 oai:hal.in2p3.fr:in2p3-00132026 Contributeur : Michel Lion <> Soumis le : Mardi 20 Février 2007, 09:20:05 Dernière modification le : Jeudi 12 Juillet 2007, 09:48:26