Energy resolution of large-area CdTe p-i-n detectors with charge loss correction

Abstract Earlier developed CdTe p–i–n detectors technology (energy resolution is close to the Ge ones) gives a possibility to solve various tasks of γ-active materials control. For inspection of the materials irradiating γ-quanta with energies of 100–400 keV (for example, U, Pu), it is sufficient to increase the sensitive area of detector up to 4–5 cm 2 (with the thickness about 2.5–3 mm). It might allow measurement of the nuclear materials characteristics using standard software, designed for Ge detectors. The research results for large square CdTe p–i–n detectors and detection systems development will be demonstrated in this work. The factors limiting energy resolution and other characteristics (peak-to-background ratio, shape of amplitude distribution, charge losses) of the large CdTe detectors will be discussed.