α resonance structure in 11B studied via resonant scattering of 7Li+α.

A new measurement of α resonant scattering on 7Li was performed over the excitation energy of 10.2-13.0 MeV in 11B at the low-energy RI beam facility CNS Radioactive Ion Beam separator (CRIB) of the Center for Nuclear Study (CNS), University of Tokyo. The excitation function of 7Li+α at 180° in the center-of-mass system was successfully measured for the first time with the inverse kinematics method, providing important information on the α cluster structure in 11B and the reaction rate of 7Li(α,γ), which is relevant to the 11B production in the ? process in core-collapse supernovae. The excitation function of the 7Li(α,p) reaction cross section for 11.7-13.1 MeV was also measured. [ABSTRACT FROM AUTHOR]