Invariant mass spectroscopy of 19,17C and 14B using proton inelastic and charge-exchange reactions☆

The neutron-rich carbon isotopes C-19,C-17 and the boron isotope B-14 have been investigated, respectively, by the proton inelastic and charge-exchange reactions on a liquid hydrogen target at around 70 MeV/nucleon. The invariant mass method in inverse kinematics was employed to map the energy spectrum above the neutron decay threshold of the residual nuclei. New states on carbon isotopes are reported. An experimental capability of extracting beta-decay strengths via forward angle (p, n) cross sections on unstable nuclei is shown.