Abstract
A radon dosemeter widely used in Italy and other countries has a cylindrically shaped diffusion cell and contains two LR-115 detectors covered by a thin film of absorber as an energy degrader. The sensitivity of this dosemeter was first studied by means of a simplified model for track formation in LR-115, based on three independent parameters ( E min , E max and the critical angle θ c). In this work the model, which is based on analytic and standard numerical methods, has been modified to take into account the actual functional dependence of LR-115 response on alpha particle energy and incidence angle. The new computed sensitivity has been compared with a new set of experimental data obtained with absorber thickness ranging from 6 to 53 μm .
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