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Preparation method of self-color-developing dosemeter for individual dose monitoring

A dosimeter and self-display technology, which is applied in the field of preparation of self-color dosimeters, can solve the problems that it cannot be used as a personal dosimeter, and achieve the effect of low detection limit and optimized preparation process

Active Publication Date: 2013-08-28
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, a university has developed a radiochromic film dosimeter for blood irradiation, which uses a recessive dye as the photosensitive component and has a lower detection limit of 5Gy, but it still cannot be used as a personal dosimeter

Method used

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  • Preparation method of self-color-developing dosemeter for individual dose monitoring
  • Preparation method of self-color-developing dosemeter for individual dose monitoring
  • Preparation method of self-color-developing dosemeter for individual dose monitoring

Examples

Experimental program
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Effect test

preparation example Construction

[0028] A preparation method for a self-color dosimeter for personal dose monitoring, the method comprises the following steps:

[0029] (1) Dissolve the base material completely with a diluent; (2) Dissolve the color-changing dye with a diluent and filter out the insoluble matter; (3) Mix and stir the solutions obtained in steps (1) and (2) evenly; (4) Use The film is made by casting method; the color-changing dye used is a diacetylene-like compound, and the ratio of the color-changing dye to the base material is 1:10~2:1.

[0030] The color-changing dye is diacetylenoid compound 344 (R, R' is (CH 2 ) 3 OCONH(CH 2 ) 3 CH 3 ), diacetylene-like compound 166 (R, R' is OCONH (CH 2 ) 5 CH 3 ), butadiyne-like compound 156 (R is CH 2 OCONH (CH 2 ) 5 CH 3 , R' is CH 2 OCONH (CH 2 ) 4 CH 3 ), any one of pentadecanediyne carboxylic acid PCDA, tricosanediyne carboxylic acid TCDA or a mixture thereof.

[0031] The base material is PVA, PVB, PVC or nylon.

[0032] The dilu...

Embodiment 1

[0037] Weigh 40 parts of PVC base material, add it into THF diluent, stir for 2 hours to dissolve it, and make the solute content 0.05g / mL at the same time, so that it has a suitable viscosity. Another 20 parts of PCDA color-changing dye was weighed, dissolved in tetrahydrofuran as a diluent, and prepared into a 0.01 g / mL solution, and the insoluble matter was filtered off. The above two solutions were mixed, and the dosimeter film was prepared by casting method, and the measured film thickness was about 180 μm.

[0038] In order to investigate the background difference of the prepared dosimeter, the middle part of the film was selected, and 5 pieces of 1cm×1cm film were cut to measure the background absorbance. As shown in Table 1 below, the relative standard deviation of the background measurement is about 1%.

[0039]

[0040] Table 1 Background absorbance measurement

[0041]

[0042] In order to investigate the radiation dosimetry performance of the dosimeter, an irr...

Embodiment 2

[0046] The steps and method are the same as in Example 1. The difference is that the number of parts of the base material and color-changing dye added is different, and when dissolving the color-changing dye and base material, the dissolution temperature is controlled to be 50 ° C, and the temperature of the mixed solution is cooled to room temperature. The casting method is used to make the film, as shown in the table below:

[0047] Table 2 The number of parts of color-changing dye and matrix material added

[0048] Color changing dye (parts) Base material (parts) 1 20 200 2 20 80 3 20 20 4 20 10

[0049] The dosimeter prepared according to the number of parts of the color-changing dye and the base material listed in the above table is irradiated in the gamma irradiation standard device. When the irradiation dose changes from 0.1Gy to 3Gy, the color of the dosimeter changes from white to for blue.

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Abstract

The invention belongs to the technical field of radiation dose monitoring, and discloses a preparation method of a self-color-developing dosemeter for individual dose monitoring. The preparation method of the self-color-developing dosemeter for individual dose monitoring comprises the steps of (1) using a diluent to completely dissolve a base material, (2) using a diluent to completely dissolve a chromotropic dye, and carrying out filtration, (3) mixing solutions obtained through the step (1) and the step (2), and evenly stirring, and (4) using a tape casting method to manufacture film, wherein the chromotropic dye is diacetylene-like compounds, and the proportion between the chromotropic dye and the base material is 1:10-2:1. The preparation method of the self-color-developing dosemeter for individual dose monitoring is rapid in response, low in price and convenient to carry, and the detection lower limit of the preparation method of the self-color-developing dosemeter for individual dose monitoring is 0.1Gy.

Description

technical field [0001] The invention belongs to the technical field of radiation dose monitoring, and in particular relates to a preparation method of a self-color dosimeter for personal dose monitoring. Background technique [0002] Personal dose monitoring is an important means to ensure the personal safety of workers in nuclear facilities and other places and patients in radiation therapy. Fluorescent dosimeters (OSL) and radiochromic thin-film dosimeters, the first two are particularly widely used. [0003] Direct-reading personal dosimeters are expensive and require batteries for maintenance. They are not suitable for use in harsh environments, such as high, low temperature or watery environments. TLD and OSL can be overridden (10 -6 ~10) Dose measurement in the range of Gy, but the price is high and the data cannot be read at any time. It needs to be sent back to the laboratory to use a special reading device for dose measurement, which takes a long time. In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/10
Inventor 夏文叶宏生林敏蔡展帆陈克胜徐利军陈义珍
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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