RADIATION DETECTOR DEVICE

摘要

The invention relates to a radiation detector device for identifying radioactive contaminants in a measurement volume (1) comprising an arrangement of radiation detectors (3), an evaluation unit and a display unit, wherein the radiation detectors (3) each have a scintillator crystal (4) and a converter for providing the radiation detector signals, wherein the measurement volume (1) and the radiation detector device pass one another during a first coarse measurement, wherein the evaluation unit, during the coarse measurement, determines the individual spectra of the radiation detectors (3) (counters per energy channel) and/or the aggregate spectra of individual radiation detectors (3) (accumulated counts of individual radiation detectors per energy cannel) and, from the individual spectra and/or the aggregate spectra, determines, if appropriate, the total counts of the radiation detectors (3) (counts over entire energy range), and/or the aggregate total counts of individual radiation detectors (3) (accumulated total counts of individual radiation detectors). It is proposed that the evaluation unit, during the coarse measurement, with low channel resolution, generates the individual spectra of the radiation detectors (3) and/or the aggregate spectra of individual radiation detectors (3) and, upon identifying an alarm condition, generates an alarm for the relevant measurement location at the measurement volume (1), and that the evaluation unit, in the case of an alarm, in a fine measurement at the measurement location (1) to be assigned to the alarm, with high channel resolution, generates the individual spectrum of a radiation detector (3) and/or the aggregate spectrum of individual radiation detectors (3) and performs a nuclide analysis on the basis thereof.