Scale device for fitting K value of scintillation chamber

A technology of scintillation chamber and K value, applied in measurement devices, radiation measurement, instruments, etc., can solve problems such as reducing the reliability of experimental data and increasing experimental errors, and achieve the effect of overcoming experimental errors and improving accuracy.

Active Publication Date: 2019-08-02
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology

In the case that the K value of the scintillation chamber has not been studied and determined through the calibration experiment, using the K value of individual scintillation chambers to represent the sa

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  • Scale device for fitting K value of scintillation chamber
  • Scale device for fitting K value of scintillation chamber
  • Scale device for fitting K value of scintillation chamber

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] In the past, the K value of the scintillation chamber was obtained only with a certain activity of the radium standard solution. However, after a large number of experiments, it was found that the K values ​​obtained by radium standard solutions with different activities were not the same. A single K value will bring large experimental errors, cannot meet the experimental requirements, and cannot represent the K value of the scintillation chamber. In orde...

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Abstract

The invention provides a scale device for fitting the K value of a scintillation chamber, and the device comprises a diffusion tube which is used for carrying laser marking liquids with different activities and collecting radon gas in a balanced state; an inflation device which is used for inflating the radon gas in the diffusion tube into the scintillation chamber; a scintillation chamber which is used for enabling the radon gas to interact with ZnS atoms on the inner wall of the scintillation chamber to excite and emit fluorescence; an FD-125 radon thorium analyzer which is used for converting fluorescence generated by the scintillation chamber into electrons and realizing multiplication and amplification to generate an electric pulse signal; an FH463B automatic calibrator which is usedfor realizing digital recording according to the electric pulse signal output by the photomultiplier within the selected time; and a scintillation chamber K value curve model fitting device which is used for fitting to obtain a scintillation chamber K value curve according to the digital record values corresponding to the series of laser marking liquids with different activities. According to thedevice, experimental errors caused by selection of the K value of the scintillation chamber are overcome through data obtained through a scale experiment, so that the accuracy of a jet gas scintillation analysis method is improved.

Description

technical field [0001] The invention relates to the technical field of scintillation chamber K value analysis, in particular to a calibration device for fitting the K value of a scintillation chamber. Background technique [0002] The K value of the scintillation chamber is the key influencing factor for the analysis of Ra-226 in water by emanation scintillation method. According to the calculation formula of the emanation scintillation method, the accuracy of the selected scintillation chamber K value will directly affect the accuracy of the experimental analysis results. [0003] In GB11214-89 "Method for analyzing Ra-226 in water by barium sulfate co-precipitation emanation scintillation method", the K value scale of the scintillation chamber is selected as "radium source activity is around 30Bq closed for 1-2d; radium source activity is 0.5-1.0 Bq closed 3 ~ 5d". Under this condition, the activity of the radium source is high and the sealing time is short. Although a h...

Claims

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Application Information

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IPC IPC(8): G01T1/202
CPCG01T1/202
Inventor 谷懿徐立鹏葛良全邓晓钦陈立王猛
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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