Search

We have measured all deuteron analyzing powers $${(A_{y}^{d}, A_{yy}, A_{xx}, A_{xz})}$$ for deuteron-proton elastic scattering at 294 MeV/nucleon in order to study the properties of three nucleon forces (3 NFs). Measurement was made at in an angular range of $${\theta_{{\rm c.m.}} = 35.6^{\circ} - 163.0^{\circ}}$$. Obtained data were compared with Faddeev calculations with and without the 3 NFs. At $${\theta_{{\rm c.m.}}\lesssim 120^{\circ}}$$ all the data have general agreement with the calculations, while the measured data at $${\theta_{{\rm c.m.}} \gtrsim 120^{\circ}}$$ are not explained by any theoretical calculations. These results were consistent with those at 250 MeV/nucleon. [ABSTRACT FROM AUTHOR]

Spectroscopy for neutron-rich nuclei He and Be has been performed by means of heavy-ion double charge exchange (HIDCX) (O, Ne) reaction on stable target nuclei Be and C, respectively. Several clear peaks in Be at low excitation energy region even above neutron separation energy have been observed in one-shot measurement, whereas no prominent signals of He have been observed owing to the small cross section. It is shown that the HIDCX reaction is a new powerful spectroscopic tool for study of unstable neutron-rich nuclei. [ABSTRACT FROM AUTHOR]

Cross sections of pd breakup reaction at E = 250 MeV were measured systematically in single-proton detection and in two-proton coincidence detection. Measured cross section is up to two times higher than calculated ones. The enhancement of breakup cross section is similar to reported enhancement in pd elastic scattering cross section. Origins of this enhancement are discussed. [ABSTRACT FROM AUTHOR]

With the aim of clarifying roles of the 3NFs in nuclei experimental programs with the polarized deuteron beam at intermediate energies are in progress at RIKEN RI Beam Factory. As the first step, we have measured a complete set of deuteron analyzing powers in deuteron-proton elastic scattering at 250 and 294 MeV/nucleon. The obtained data are compared with the Faddeev calculations based on the modern nucleon-nucleon forces together with the Tucson-Melbourne'99, and UrbanaIX three nucleon forces. [ABSTRACT FROM AUTHOR]

In our previous inclusive experiment on H( p, p) pn at 247 MeV, the measured cross section at forward angles is about twice larger than 3 N calculation with ππ 3NF. Therefore, we have made an exclusive experiment on H( p, p p) n at the same energy. The preliminary data suggest that the cross section was enhanced at forward angle of θ and θ. [ABSTRACT FROM AUTHOR]

In our previous measurement of pd radiative capture at E d = 137 and 196 MeV, we found an interesting fact that the measured tensor analyzing powers show the relation A xx ≈ A yy , although calculated A xx and A yy are apparently different, A xx ≠ A yy . The measured A yy agrees fairly well with the 3 N calculations, and the measured A xx largely disagrees with calculated A xx . Similar experiments on pd capture have been made at KVI at nearly the same energies of 130–180 MeV. The KVI data also support A xx ≈ A yy relation, but absolute values of A xx and A yy at KVI are about half of RCNP data. Therefore, we made a new experiment of pd capture at E d = 196 MeV. A zz was measured in three different ways, and data analysis is in progress. Preliminary data seem to support our previous data. [ABSTRACT FROM AUTHOR]