Ma. Misdaq et al., Determination of uranium and thorium contents inside different materials using track detectors and mean critical angles, APPL RAD IS, 51(2), 1999, pp. 209-215
The critical angles of the CR-39 (theta(c)) and LR-115 type II (theta(c)')
solid state nuclear track detectors (SSNTD) for detecting alpha-particles e
mitted by the uranium and thorium series have been evaluated by calculating
the corresponding ranges of the emitted alpha-particles in different mater
ial samples and in the SSNTD studied. The influence of the emitted alpha-pa
rticles initial and residual energies on the critical angles of the SSNTD s
tudied has been investigated. The uranium and thorium contents of different
geological samples have been evaluated by exploiting data obtained for the
critical angles of the CR-39 and LR-115 type II solid state nuclear track
detectors and measuring the corresponding densities of tracks. (C) 1999 Els
evier Science Ltd. All rights reserved.