TECHNIQUES TO INVESTIGATE THE CHARACTERISTIC OF CR-39 DETECTORS USINGAM-BE NEUTRON SOURCE

Two techniques have been developed to investigate the characteristic o f the sensitivity of CR-39 (polyallyldiglycol carbonate) track detecto r using Am-Be neutron source. The first is to measure volume track den sity created by fast neutrons in CR-39 detectors. The second is to mea sure areal asymptotic track density on the surface of CR-39 sheets. Tw o types of CR-39-SY-2 CR-39 made in China and another made in USA were calibrated using the techniques. It shows that the two types of CR-39 detectors have nearly the same sensitivity to detect fast neutrons. T he techniques developed in this work can be applied to calibration of other track detectors.