Charged-Particle Decays of Highly Excited States in$^{19}$ F

P. Adsley (1) , F. Hammache (1) , N. de Séréville (1) , M. Assié (1) , D. Beaumel (1) , M. Chabot (1) , M. Degerlier (1) , C. Delafosse (1) , F. Flavigny (1) , A. Georgiadou (1) , J. Guillot (1) , V. Guimaräes (1) , A. Gottardo (1) , I. Matea (1) , L. Olivier (1) , L. Perrot (1) , I. Stefan (1) , A. Laird , S.P. Fox , R. Garg , S. Gillespie , J. Riley , J. Kiener (2) , A. Lefebvre-Schuhl (2) , V. Tatischeff (2) , I. Sivacek

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

Neutron-capture reactions on$^{18}$ F in the helium-burning shell play an important role in the production of$^{15}$ N during core-collapse supernovae. The competition between the$^{18}$ F( $n,p/\alpha $ )$^{18}$ O/$^{15}$ N reactions controls the amount of$^{15}$ N produced. The strengths of these reactions depend on the decay branching ratios of states in$^{19}$ F above the neutron threshold. We report on an experiment investigating the decay branching ratios of these states in order to better constrain the strengths of the reactions.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

P. Adsley, F. Hammache, N. de Séréville, M. Assié, D. Beaumel, et al.. Charged-Particle Decays of Highly Excited States in$^{19}$ F. 15th International Symposium on Nuclei in the Cosmos, Jun 2018, Assergi, Italy. pp.271-275, ⟨10.1007/978-3-030-13876-9_45⟩. ⟨hal-02058341⟩