The Bragg-peak studies in CR-39 SSNTD on the basis of many-hit model for track etch rates

Abstract Etching rates along tracks of protons and lithium ions with energies in the Bragg peak region were explored. The energy losses in this region, especially for protons of low energies, are of particular interest from the physical as well as biological points of view. The microscopic track etch rate, V T , is studied using the many-hit model in its first approximation assuming that V T is a function of the restricted energy loss ( REL ω ) . The ions multiple scattering and straggling effects on the average experimental V T values are corrected by shifting the calculated REL ω values along the track, until its maximum coincides with that of the V T . The fitting of least square differences between calculated and experimental V T values is used in order to determine the many-hit model registration parameters for the detector under investigation.