Interaction dans l'état final n-p dans les réactions 2H(d, pn) 2H, 4He(d, pn) 4He, 6Li(d, pn) 6Li et 3He(d, pn) 3He

Abstract

Three-body break-up in n-p final-state interaction regions has been investigated through the reactions 2 H + d → p + n + [su2 H, 4 He + d → p + n + 4 He, 6 Li + d → p 3 He + d → p + n + 3 He . In all cases, the proton and the neutron were detected at the same angle in a kinematically complete experiment for a deuteron bombarding energy of 27.5 MeV. Helium and deuterium gas targets in a small gas cell cooled with liquid nitrogen were used. No indication of any possible contribution from the (isospin-forbidden) 1S 0 p-n final-state interaction was observed in the first three reactions. For the 3He + d reaction, the data shown pronounced enhancements due to the p-n final-state interaction. In the forward regions the observed peaks are broader than the predictions of final-state interaction models.