Measurement of the H(S-38,p ') reaction at forward angles including 0 degree

摘要

Collective motions of beta unstable nuclei are interesting because of the uniqueness of shapes different from those of stable nuclei. Measurements of such mode of the giant resonances will supply fruitful of information unaccessible from the previous experiments. In order to access region of the sufficiently high excited energy with small momentum transfer for beta unstable nuclei, we newly constructed a magnetic spectrometer for 0 degree scattered recoil particles in inverse kinematics. By means of the spectrometer we measured the H(S-38,p(1)) reaction at forwarding angles including theta(CM) = 0 degrees at E-38S = 62 AMeV as the first challenge of this method. As an experimental result, a bump is confirmed at around E-x = 17 MeV. Direct evidences for ISGMR of the beta unstable nuclei have not yet been derived. It is hoped that the E0 strength co-exists in the observed bump.