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Gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits

A technology for quantitative measurement and uranium deposits, applied in the field of gamma total logging probes, can solve the problems of low sensitivity and inability to accurately measure uranium content, and achieve the effect of improving detection sensitivity

Inactive Publication Date: 2016-10-05
BEIJING RES INST OF URANIUM GEOLOGY
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AI Technical Summary

Problems solved by technology

[0004] For general radioactive uranium deposits and some deposits with high uranium content, the gamma total logging probe in the prior art can measure accurate uranium content data, but for some low-content uranium deposits, existing gamma The total logging probe has low sensitivity and cannot accurately measure uranium content

Method used

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  • Gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits
  • Gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits
  • Gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits

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Embodiment 1

[0028] like figure 1 As shown, the gamma total logging probe in this embodiment includes a radiation detector, an inverting amplifier, a pulse shaping circuit, a non-inverting amplifier, a clamping circuit, a discrimination circuit, a timing control circuit, a drive output circuit and a power supply.

[0029] The radiation detector is a high-sensitivity radiation detector that converts detected natural gamma rays into electrical pulse signals. The radiation detector preferably adopts shielding measures to reduce the influence of low-energy scattered rays on the quantitative determination of uranium content.

[0030] like figure 2 As shown, the radiation detector includes a scintillator and a photomultiplier tube, and a sodium iodide (thallium) crystal with an effective volume of Ф30mm×80mm is selected as the scintillator of the radiation detector. The relatively large crystal makes it excited when gamma rays irradiate The crystal produces more photons, which will generate m...

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Abstract

The invention belongs to the technical field of a uranium mine exploration geophysical underground measurement instrument, and specifically relates to a gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits. The gamma quantum logging detection tube is characterized in that: a radiation detector is used to convert gamma rays into electric pulse signals; the electric pulse signals are transmitted to a discrimination circuit through inverse-phase amplification, pulse shaping, in-phase amplification and zero clamping successively; the discrimination circuit compares the electric pulse signals with threshold level to obtain gamma signal pulse satisfying an energy threshold scope, and outputs the gamma signal pulse to a sequential counting circuit for counting processing, and then the gamma signal pulse enters a drive output circuit to perform amplification driving; and finally the data is output to an overground console. The gamma quantum logging detection tube for quantitative measurement of low-content uranium deposits can solve the technical problem that the prior art is hard to accurately measure the uranium content of a low content uranium mine layer, and can significantly improve the detection sensitivity and accurately measure high content and low content uranium mine layers.

Description

technical field [0001] The invention belongs to the technical field of geophysical downhole measuring instruments for uranium ore exploration, and in particular relates to a gamma total logging probe tube for quantitative measurement of low-content uranium deposits. Background technique [0002] Gamma logging is a basic geophysical logging method for the general survey and exploration of radioactive uranium deposits. It uses radiation detectors in the well to measure the natural gamma ray intensity of rock formations and ore bodies along the borehole, and according to the measured gamma ray Ma field distribution, which determines the location, thickness and content of radioactive elements in the radioactive mineral layer drilled through. At present, the gamma total logging results of uranium deposits have been used as the main data for the calculation of uranium reserves, especially in the case of low core extraction rate in ore beds. [0003] Different from petroleum loggi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V5/06G01T1/20G01T1/167
Inventor 马艳芳陆士立焦仓文乔宝强樊艾
Owner BEIJING RES INST OF URANIUM GEOLOGY
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