COMPARISON OF HPGE DETECTORS OF FALCON 5000N SPEKTROMETERS IN EQUIPMENT OF UNITS OF HZS CR

Abstract

Fire Brigade of the Czech Republic has in its equipment range of devices for detection
of ionizing radiation, locate and determine their sources. One of these devices is the FALCON
5000N gamma spectrometer with HPGe (High-Purity Germanium) detector. This device, as
explained below, will use an effective calibration to determine the activity. This can be done by
direct measurement of a known activity standard. The second option is to calculate it based on
the mathematical model. This paper deals precisely with the accuracy of the calculated
efficiency calibration by comparing the measured activity values using the calculated efficiency
calibration and using the calibration obtained by measuring the standard sample.
Subsequently, we compared the HPGe detectors of the FALCON 5000N spectrometers, which
are equipped with in chemical laboratories of the Czech Republic's Fire Brigade. The aim of
this comparison was to find out to what extent can be used the calculated calibration efficiency
of a one spectrometer transferred to other spectrometers. This comparison confirmed the good
match of the results for all FALCON 5000N spectrometers using the to-end geometry, the
geometry where the sample is placed above the detector in its axis.