Nuclear Astrophysical studies using low-energy RI beams at CRIB

Abstract

CRIB (CNS Radioactive Ion Beam separator) is a low-energy RI beam separator at the Center for Nuclear Study (CNS) of the University of Tokyo, used for various studies covering nuclear-astrophysical topics. An application of the RI beam at CRIB for the astrophysical studies is a new measurement of the proton resonance scattering on Be-7. The measurement was performed up to the excitation energy of 6.8 MeV, ans the excitation function above 3.5 MeV was successfully measured for the first time, providing important information about the reaction rate of Be-7(p,gamma)B-8, which is the key reaction in the solar B-8 neutrino production. A preliminary result of the Be-7+p experiment is presented.