Quasi-free process in the 6Li(α,3He5He)2H reaction at Eα = 119 MeV

Cross sections for the 6Li(α,α3He) reaction were measured at Einc=119 MeV in coplanar geometry. In continuum energy regions of the energy maps, some enhancements which correspond to QF peaks of the α + α → 3He + 5He QFR in the 6Li(α,3He5He)2H reaction, were seen. At zero recoil momentum, three-body breakup cross sections for the 6Li(α,3He5He)2H reaction were deduced from the measured cross sections of the 6Li(α,α3He) reaction by considering detection efficiencies of 5He. The detection efficiencies were estimated using the Monte Carlo method. In the analysis of the reaction, the PWIA was applied, by which two-body cross sections of the elementary process in this QFR were deduced from the three-body cross sections. The deduced two-body cross sections were normalized to a free cross section for the 4He(α,3He)5He reaction and compared with the angular distribution of the free cross sections. The deduced two-body cross sections were almost agree with the angular distribution. (author)