The detection technology of PIN silicon photodiode applied in the n/γ mixed radiation field

PIN-type silicon semiconductor detectors, which is widely used in Personal dosimeters, X-ray fluorescence analysis, coating thickness measurement, diagnostic radiology and other particle radiation measurement, have faster response, stronger anti-interference, smaller size, higher sensitivity, higher energy resolution and without high voltage than traditional radiation detectors. We use the 6LiI crystal and BGO to change the n and γ-ray spectrum into the effective detection range of PIN. Referenced to the equivalent circuit model of the PIN silicon photodiode, we design the charge preamplifier circuit and the measurement system to match it. At the same time, we do the sample measurement and spectrum analysis of the preamplifier noise, pulse of rays and electromagnetic radiation interference digital measurement Finally, we complete the detectors repeatability, sensitivity, energy response performance testing experiments. (authors)