Radiation detectors based on silicon monolithic telescope in medical applications

Different silicon detectors have been designed and fabricated based on the silicon monolithic telescope concept. The surface vertical diode, the ΔE stage, is only about 2 μm thick and shows very good charge collection properties. Circular anodes with a diameter of about 10 μm allow to obtain cylindrical sensitive volumes of micrometric size. This micrometric diode has been proposed as a silicon microdosimeter with the proper corrections for the chord distribution and the tissue equivalence. The lineal energy spectrum has been successfully compared with TEPC spectra and the dose-mean lineal energy with data from literature. The present lower limit is about 10 keV μm⁻¹ fixed by the electronic noise.