DEVELOPMENT OF COPOLYMER OF CR-39 WITH HIGH-SENSITIVITY TO LOW LET PARTICLES

Several types of copolymers of CR-39 were prepared to find its usefuln ess as a nuclear track detector of high sensitivity. Track responses o f these copolymers were investigated by irradiating energetic ions fro m proton through Ar. The copolymer of CR-39 monomer with N-isopropylac rylamide (NIPAAm) shows higher sensitivity than that of pure CR-39 for low LET particles such as protons. Preliminary results are reported f or the track responses of copolymers (CR-39/NIPAAm) with various conte nts of NIPAAm as well as the etching properties.