Low‐energy radioactive‐ion beam separator at CNS and resonance scattering experiments

A low‐energy radioactive‐ion beam separator based on an in‐flight technique was developed at CNS, University of Tokyo and was installed at RIKEN. Using the separator, experiments of the elastic resonance scattering of 11C+p, 12N+p, and 23Mg+p were performed to study resonance levels in 12N, 13O, and 24Al, respectively. New information on spin‐parities and widths for these levels may help understand stellar (p,γ) reaction rates.