Working Method of Portable Multichannel Gamma Spectrometer

Abstract

The invention discloses a working method of a portable multi-channel gamma energy spectrometer. Firstly, at a specific temperature, various standard sources are used to perform energy calibration on the energy spectrometer, and the corresponding relationship Ei between the track site Ci and the gamma ray energy Ei is obtained. = f(Ci), and store it in the electronic system; the multi-channel gamma energy spectrometer has a power-on stabilization mode, an automatic spectrum stabilization mode and a measurement mode, and the working process of the three modes is as follows: multi-channel gamma energy After the spectrometer is turned on for self-test, run the power-on spectrum stabilization mode. After the power-on spectrum stabilization mode is executed, the multi-channel gamma spectrometer enters the ready state and enters the automatic spectrum stabilization mode. If the multi-channel gamma spectrometer in the automatic spectrum stabilization mode The spectrometer enters the measurement mode after receiving the command to operate the keys. The invention has the advantages of light weight, simple operation, high sensitivity and accurate measurement, and can be used to measure the content of uranium, thorium and potassium in the ground and rocks, so as to guide geological survey work.

Description

technical field [0001] The invention relates to the field of radioactive measuring equipment, in particular to a portable multi-channel gamma energy spectrometer for measuring the contents of uranium, thorium and potassium in rocks and its working method. Background technique [0002] Using a portable gamma spectrometer to simultaneously measure the content of uranium, thorium and potassium in rocks on site to explore minerals and solve geological problems is called "gamma ray spectrometry", or "gamma spectrometry" for short. Gamma spectroscopy is a very important and commonly used technique in the uranium exploration industry. [0003] During the use of the energy spectrometer, the luminous efficiency of the detector, the gain of the photomultiplier tube, the gain of the amplifier, and the stability of the high voltage will change with the change of the ambient temperature and temperature. The shape of the energy spectrum measured by the energy spectrometer And the peak po...

AI Technical Summary

Problems solved by technology

[0007] At present, the field energy spectrometers used at home and abroad mostly use the combination of probes and consoles, which are large in size and weight, and inconvenient to carry and use; most of the instruments use 3"×3" sodium iodide crystal detectors, which are large in size. The weight is heavy; most of them are 4-channel energy spectrum, and there are few multi-channel energy spectrum products; most of them use radioactive sources to stabilize the spectrum. The structure is complex, the weight of the instrument increases; the function of the instrument is relatively single, the degree of digitization and intelligence is not high enough, the operation is complicated, and it is not very convenient to use

In general, although there are many products, they cannot meet the growing demand as a whole

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