LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument

Abstract

The invention relates to a LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument. The instrument comprises a probe part, an operating platform, a cable and a winch, wherein the probe part comprises a LaBr3(Ce) crystal gamma ray detector formed by combining LaBr3(Ce) and a photomultiplier, a spectroscope amplifier, a peak holding circuit, a pulse amplitude analyzer and a high and low voltage power supply; the operating platform comprises a power supply converter and a computer; and the spectroscope amplifier receives a pulse signal from the detector, the pulse signal is input into the pulse amplitude analyzer through the peak holding circuit after passing through the spectroscope amplifier, and digital information output by the pulse amplitude analyzer is connected with a 485 communication interface of the computer through a 485 communication interface of the probe, and the cable. The logging instrument can directly measure the characteristic energy spectra of various radionuclides such as a uranium family, a thorium family, potassium and the like in nuclear resource logging, and has the characteristics of high energy resolution, measuring efficiency and stability, and the like.

Description

Based on LaBr 3 (Ce) crystal multi-channel gamma spectrum logging tool technical field The present invention relates to a multi-channel gamma energy spectrum logging tool based on LaBr3 (Ce) crystal, specifically a 1024-channel gamma energy spectrum logging tool based on LaBr3 (Ce) crystal detector, which is applied to uranium ore In the gamma logging, the fine gamma energy spectrum data of the formation can be directly obtained and the corresponding uranium ore layer content can be interpreted. Background technique Nuclear logging technology is one of the cutting-edge technologies developed rapidly with the development of contemporary technology and its application in the exploration of uranium, thorium, oil and gas, coal and other minerals. It uses the γ-rays naturally produced (or artificially stimulated and artificially activated) in the formation rocks to study the distribution of the rays along the well axis, and then determine whether the formation rocks contain ce...

AI Technical Summary

Problems solved by technology

This series of factors has brought great difficulties to obtain the fine gamma energy spectrum of the borehole

Spectral logging tools that usually use crystal detectors such as NaI(Tl), CsI, and BGO cannot effectively overcome the above-mentioned difficulties and obtain fine γ-spectrum information of the formation due to the limitations of detector energy resolution and detection efficiency. Accurately interpret the content of uranium, thorium, potassium and other nuclides in the formation

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