The BeOmax system – Dosimetry using OSL of BeO for several applications

The BeOmax-system uses the OSL of BeO for dose measurement. The OSL-Material is Thermalox 995™ from Materion Ceramics® in quadratic or cylindrical form. For an easy handling complete dosimeters with encapsulated quadratic detectors and identification code for automatic evaluation are also available. Stimulation of detectors is performed with a blue LED (455 nm), OSL signal (UV-region) is detected with a Hamamatsu photo sensor module (PSM) from the opposite detector side. Several filters to avoid stimulation light reaching the PSM are necessary. An electronic and special software offers an easy evaluation of the PSM-signals and to specify dose. The dose characteristic is linear from 10 μGy up to 10 Gy. Then supralinearity connected with a change of the shape of the decay curve starts. The saturation begins with some hundred grays. The variation coefficient of dose measurements is below 2% for dose higher than 0.1 mGy. The energy dependence shows an underestimation of low energy photons. The BeOmax-System can be used in medicine, for industrial applications and for scientific research. Two examples will be shown.

► Dosimetry using OSL of BeO.
► Linear dose characteristic from some μGy up to some gray.
► Supralinearity starting at some gray with saturation beginning at some hundred gray.
► Only short time fading.
► System applicable in medicine, scientific research and for industrial applications.