Phase-shift analysis of polarization and differential cross section in p-4He elastic scattering between 25 and 29 MeV

Abstract Phase-shift analyses have been carried out on the polarization and cross-section data in p + 4 He elastic scattering between 25 and 29 MeV. The results show that the spin and parity of the 20 MeV resonance in 5 Li are 5 2 + . From the phase-shift set obtained for this partial wave, the parameters of this resonance are estimated. The results also indicate a resonance with Kπ = 1 2 + at about 18 MeV excitation in the 5 Li system.