A realistic simulation of gamma-ray detectors

Simulation of gamma-ray semiconductor detector generally makes assumptions such as electric field uniformity, constancy of mobilities and trapping times respect to electric field, etc. At least a part of these assumptions are not valid. A way to overcome this problem is to measure the collection efficiency as a function of depth directly. By a particular version of the micro-IBIC technique we measured the collection efficiency on a section of a CdTe detector and we used the experimental data as input for the Monte Carlo code ISIDE for simulating pulse height spectra produced by ⁵⁷Co. The results obtained by this more realistic approach are presented and can be compared both with other kinds of simulations and with available experimental data.