Gamma energy spectrum background counting method

Abstract

The invention discloses a gamma energy spectrum background counting method. The method comprises steps of a gamma energy spectrum curve being generated in an energy-counting coordinate system according to gamma energy spectrum data obtained through measurement; calculating a difference value of gamma energy spectrum count values corresponding to two adjacent energy scales from a low-energy end ofthe gamma energy spectrum curve; if the difference value is smaller than the threshold value, taking the difference value as a background count value; if the difference value is greater than the threshold value, further judging in an energy interval of the full width at half maximum FWHM(i) corresponding to the E(i), if the absolute value of most counting difference values in the interval is greater than a threshold value, extracting a gamma energy spectrum count value count (j) corresponding to the energy E(i) + q*FWHM(i), and neglecting the gamma energy spectrum count value between count (i)and count (j); otherwise, taking the gamma energy spectrum count value in the interval as a background count value. The background counting method is simple and effective, and the monitoring result can be directly generated when the method is applied to a measuring instrument.

Description

technical field [0001] The invention belongs to the technical field of radionuclide detection, and in particular relates to a background counting method proposed for the gamma energy spectrum generated in the radionuclide detection process. Background technique [0002] Marine radionuclide online measuring instruments are required to have the functions of automatically monitoring the total amount of gamma radioactivity existing in the marine environment, and at the same time automatically detecting the activity of typical artificial radionuclides represented by Cs-137, so as to provide users with marine radioactivity Environmental safety monitoring and pollution early warning services. [0003] At present, the radionuclide on-line measurement instruments at home and abroad routinely use 1024 counting channels, so what the instrument automatically detects is a gamma energy spectrum curve covering the detection energy range, which is composed of 1024 continuous detection value...

AI Technical Summary

Problems solved by technology

[0007] Based on the above problems, in order to realize the on-site, automatic and real-time measurement, processing and analysis of marine radionuclide gamma energy spectrum by marine radionuclide online measurement instruments, a simple but effective method for automatically calculating background counts must be established to adapt to the measurement instruments Limited Data Processing Capabilities

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