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Recently it was found that the differential cross sections of elastic Nd scattering below 150 MeV can be well reproduced by incorporating a 3NF in Faddeev calculations based on modern nucleon-nucleon (NN) interactions. On the other hand, the differential cross sections for nd and pd at 250 MeV show large discrepancies between the data and the Faddeev calculations with a 3NF. This indicates the existence of the missing features of the three nucleon force in this energy region. For the next step in the 3NF study, we have measured the vector analyzing power Ay and the differential cross sections for the 2H(pvector ,pp)n breakup reaction at 250 MeV. The experiment was carried out by detecting two protons in the final state with using the double-armed spectrometer Grand Raiden (GR) and the Large Acceptance Spectrometer (LAS) at the Research Center for Nuclear Physics (RCNP). The data was compared with the results of Faddeev calculations with and without a 3NF. [ABSTRACT FROM AUTHOR]

From the recent studies, it has been found that the differential cross sections of the elastic Nd scattering at the energy below 150 MeV can be well reproduced by incorporating the 3NF in the Faddeev calculation based on modern nucleon-nucleon (NN) interactions. On the other hand, the differential cross sections of nd and pd at 250 MeV show large discrepancies between the data and the Faddeev calculations with 3NF. It indicates the presence of the missing features of the three nucleon system at this energy region. For the next step of the 3NF study, we measured the vector analyzing power Ay and the differential cross sections for the 2H(p, pp)n breakup reaction at 250 MeV. The experiment was carried out by detecting two protons in the final state with using the double-armed spectrometer Grand Raiden (GR) and Large Acceptance Spectrometer (LAS) at Research Center for Nuclear Physics (RCNP). These data provide important information on the 3NF effects and make a discrimination between 3NF models. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

The results of experimental studies of three-nucleon systems will be presented, i.e. the pvector d elastic scattering at Ep = 250 MeV and the dvector p → 3He+γ capture reaction at Ed = 200 MeV. The angular distributions of the cross section and all the proton spin observables were measured for elastic scattering, and the cross section and analyzing powers, Ay, Axx and Ayy for the capture reaction. The results are compared with theoretical predictions based on exact solutions of the three-nucleon Faddeev equations and modern realistic nucleon-nucleon potentials combined with three-nucleon forces. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

Analyzing power A[sub y](θ) of nd scattering was accurately measured at E[sub n] =12 and 16 MeV. Polarization of the n-beam produced by spin transfer ²H(d, n)³He reaction at 0° was determined in a separate experiment using [sup 4]He(n, n) scattering. The present nd A[sub y](θ) data are consistent with the existing nd A[sub y](θ) data below E[sub n] = 14.1 MeV. It was confirmed that the difference between nd A[sub y] and pd A[sub y] becomes large above 14 MeV and the assumption on slow-down effects by Coulomb force breaks down. The observed large difference in A[sub y](θ) requires systematic calculations with exact treatment of Coulomb force to study charge symmetry in nuclear force. [ABSTRACT FROM AUTHOR]