On-line type energy spectrum analysis anti-coincidence measurement detector

Abstract

The invention relates to the field of radiation measurement and provides an on-line type energy spectrum analysis anti-coincidence measurement detector. The detector comprises a sodium iodide scintillator for recording a gamma ray, a photomultiplier for converting an optical signal of the sodium iodide scintillator into a weak pulse signal, a plastic scintillator for deducting Compton flashing of the sodium iodide scintillator, a silicon photomultiplier for converting an optical signal of the plastic scintillator into a weak pulse signal, a lead shielding body for shielding an environment radiation band alignment hole and a lead plug, and a forward amplifying plate for amplifying the weak signals. The detector can achieve complex environment, Compton flashing and serious background interference always on-line measuring, eliminate the influence of nuclear site Compton flashing on 50keV-1.5MeV middle and low energy section radionuclide analysis measurement, and, at the same time, solve the difficulty that anti-coincidence measurement is unlikely to be achieved on a nuclear site.

Description

technical field [0001] The invention relates to the fields of radiation measurement, nuclear medicine and nuclear electronics, in particular to an on-line energy spectrum analysis anticoincidence measurement detector, which is suitable for radiation signal processing in nuclear power plants, nuclear medicine or nuclear logging, and is especially suitable for On-line activity concentration measurement with severe Compton flash and background interference sensitivity. Background technique [0002] Coincidence measurement is used in many industries, especially in nuclear medicine and radioactivity measurement. The anti-coincidence method is used to reduce the influence of the background on the measurement results, thereby improving the measurement sensitivity of the detector. The conventional anti-coincidence radioactivity measurement is mainly carried out in the laboratory with offline sampling measurement, and the measurement process needs to be in a lead room, and the backgr...

AI Technical Summary

Problems solved by technology

In order to reduce the influence of Compton flash on nuclide resolution, the present invention introduces an anti-coincidence measurement method. Conventional laboratory anti-coincidence measurement conditions are relatively harsh and it is difficult to realize radionuclide analysis and measurement in complex nuclear power plants. The present invention is aimed at the site conditions of nuclear power plants , providing an anti-coincidence detector suitable for high-radiation environment background with complex radionuclide composition and online measurement all the time, which successfully solves the problem of the Compton flash in the nuclear power field The effect of nuclide analysis and measurement, and at the same time solve the difficult problem of anti-coincidence measurement in the nuclear power site

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