Moreover the transition strength determined by these reactions can give the calibration of neutrino detectors which utilize inverse beta decays. The nuclear deep hole state is one of the high excitation states in nuclei whose microscopic structure has not yet been well investigated as well as those of giant resonances. This is correspond to the state in which one nucleon of the deepest 1s state in the shell model is lacked. In light nuclei, it is theoretically predicted that the decay scheme is different from the simple statistical decay due to the SU3 spatial symmetry. The deep hole state can give useful information on the decay scheme of hyper-nuclei that are produced by exchanging a nucleon with a Lambda particle and is also relevant to the measurement of nucleon decay in the large water cherencov system.
Data analyses are in progress.
He nucleus is expected to be have much higher density than the normal saturation nuclear density. In order to get information from the high density, we have performed the experiment of elastic proton scattering from 4 He with 300 MeV polarized proton beam of RCNP ring cyclotron, and we have microscopically analyzed the data with a relativistic impulse approximation. Nuclear incompressiblity is one of the key physical quantities to discern various nuclear models describing the fundamental nuclear properties and phenomena, such as nuclear binding energies, explosions of super nova and so on. Nevertheless experimental and theoretical values contradict each other depending on their models adopted. We measure phi-meson decays in nuclear media, both in the mesonic and leptonic decay modes.