Study of key resonances in the P-30(p, gamma)S-31 reaction in classical novae

Among reactions with strong impact on classical novae model predictions, P-30(p, gamma)S-31 is one of the few remained that are worthy to be measured accurately, because of their rate uncertainty, as like as F-18(p, alpha)O-15 and Al-25(p, gamma)Si-26. To reduce the nuclear uncertainties associated to this reaction, we performed an experiment at ALTO facility of Orsay using the P-31(He-3, t)S-31 reaction to populate S-31 excited states of astrophysical interest and detect in coincidence the protons coming from the decay of the populated states in order to extract the proton branching ratios. After a presentation of the astrophysical context of this work, the current situation of the P-30(p, gamma)S-31 reaction rate will be discussed. Then the experiment set-up of this work and the analysis of the single events will be presented.