Study of proton resonances in 26Si and 27P by using the 25Al and 26Si radioactive ion beams

An explosive hydrogen burning process occurring in novae or X-ray bursts has been suggested to be important for observation of 1.809-MeV gamma rays of 26Al. In order to study relevant proton resonances in 26Si and 27P above the proton threshold, we performed elastic scattering experiments at low energies by using 25Al and 26Si radioactive ion beams. We investigated proton resonances in 26Si up to Ec.m. = 3.016 MeV as well as in 27P up to Ec.m. = 3.290 MeV. We compared observed proton resonances in 27P with those obtained by the OXBASH shell model calculation.