A new reaction spectroscopy facility, IRIS, with solid H$_{2}$/D$_{2}$ targets

Nucleon transfer reactions of rare isotopes are sensitive ways of exploring the evolution of shell structure. Two nucleon transfer reactions probe the pairing correlation in exotic nuclei. Due to the simplicity of their structure, the hydrogen isotopes, p,d,t, are the best choice for these reactions. For unstable nuclei, the reactions needs to be performed in inverse kinematics with p,d,t serving as the targets. The presentation will describe a new facility, IRIS , that pioneers in using thin windowless solid H$_{2}$ and D$_{2}$ targets [1] $\sim$ 50-100 $\mu$m, for direct reactions with re-accelerated beams of exotic nuclei. The presentation will describe the basic structure of the target and the reaction detection detectors. The solid H$_{2}$/D$_{2}$ targets eliminate the background that is present from reactions on carbon in the polyethylene foil targets. In addition, the effectively thicker targets help to increase the reaction yield. \\[4pt] [1] S. Ishimoto- et al., RCNP Progress Report 2010.