Consideration on the measurement of α and β rays with the exoelectron dosimeter

With the thin thermalox BeO disk, we have measured TSEE (thermally stimulated exoelectron emission) of α and β rays, and have found that it depends only on the stopping power of the thin surface layer of the material. It has been made clear that absorbed dose of high energy β-rays in a rather deep layer from the surface does not contribute to the exoelectron emission. This is a serious problem to measure the surface absorbed dose by the solid state detector.