Calculating the calibration coefficient for radon measurements with the bare LR 115-II track detector

Model calculations were performed to determine the calibration coefficient for radon measurements using a bare LR 115-II track detector. Calculations were based on an expression for stopping power for heavily charged particles, as well as on the Monte Carlo method. The sensitivity of the LR 115-II detector depends on equilibrium factor F, and it has been calculated for various values of F. For equilibrium factor F = 1, the calibration coefficient in this calculation was 89 m-1 (10.3 Bq d m-3 per tracks cm-2) for the removed layer, which was 5.5 microns thick.