Comparison of neutron doses measured by CR-39 via LET spectrometry and neutron rem meter

Abstract

Neutron dose for proton induced reactions on the combination of 7Li and 181Ta target was measured using CR-39 detector and a neutron rem meter, at five different proton energies (8–24 MeV). In case of CR-39, the dose equivalent (HLET) was measured via linear energy transfer (LET) spectrometry method using the major, minor radii of each track and thickness of removed surface, whereas the rem meter provided the direct reading of ambient dose equivalent [H*(10)]. Both these quantities per incident proton were found to increase with the proton energy. The response ratio of HLET to [H*(10)] was found to be in the range of 0.15–0.3 with an average 0.20 ± 0.09.