High-Resolution Study of Low-Energy Heavy Cosmic Rays with Lexan Track Detectors

Abstract
The response (track-etching rate) of Lexan polycarbonate detectors increases exponentially with the ionization rate of heavy nuclei (Z>~10). These detectors have been used to measure the charge composition and flux in 1967 of low-energy (200- to 400-MeV/nucleon) cosmic rays from 12<~Z<~28.