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

Abstract

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 Al-26. In order to study relevant proton resonances in Si-26 and P-17 above the proton threshold, we performed elastic scattering experiments at low energies by using Al-25 and Si-26 radioactive ion beams. We investigated proton resonances in Si-26 up to E-c.m. = 3.016 MeV as well as in P-27 Up to E-c.m. = 3.290 MeV. We compared observed proton resonances in P-27 with those obtained by the OXBASH shell model calculation.