Recent experimental and theoretical studies have revealed that spin degrees of freedom play a more vital role in exotic nuclei than in stable nuclei. Tensor force effects on the evolution of shell and possible occurrence of p-n pairing in the proton-rich region are good examples of manifestations of spin degrees of freedom.
In exploring the spin effects in exotic nuclei, scattering with polarized protons should be a powerful tool. We have constructed a novel polarized proton solid target aiming to shed a light of polarization to the physics of exotic nuclei. A distinguished feature of the target system is that it works under a low magnetic field of 0.1 T and a high temperature of 100 K, which exhibits a striking contrast to standard DNP targets working in extreme conditions of several Tesla and sub-Kelvin.
In the seminar, I will begin with a general overview of spin physic of exotic nuclei and present mass measurement of very rare RI related to r-process nucleosynthesis. I will also touch on future experiments planned at RI Beam Factory.