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Preparation technology of radiation color changing film for monitoring dosage in radiation processing

A radiochromic and radiation processing technology, which is applied in the field of preparation technology of radiochromic films, can solve the problems of no disclosed process, no disclosed process steps of color-changing films, etc., and achieve stable optical density and life, wide coverage dose range, and uniform thickness. Effect

Active Publication Date: 2015-07-15
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among various radiochromic film dosimeters, the FWT-60 film dose meter produced by the American Far West Technology Co. The dosimetry performance of the meter is better, and it has become the best-selling product of Far West Company all over the world, but the preparation process and formula of this product are kept secret.
Li Huazhi and others from the China Institute of Atomic Energy disclosed a radiochromic film dosimeter with nylon as the base material and HPR-CN as the dye in the open document "Development of Radiation-Changing Film Dosimeter", but they did not disclose the specific details. craft
At the same time, Li Huazhi and others of the China Institute of Atomic Energy disclosed that imported and domestic hexahydroxyethyl parafuran red cyanide dyes (HPR-CN) and Paramagentin cyanide dye (PR-CN) uses nylon as the base material to make the formulation research of radiochromic film dosimeter, but this document focuses on the performance of four kinds of dye films. The detailed test and comparison have not been disclosed. Process steps for the preparation of these several color-changing films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation process for a radiochromic film for dose monitoring in radiation processing, comprising the following steps:

[0034] (1) Substrate dissolution

[0035] Take 10 parts of nylon material as the substrate, and dissolve the nylon with 100 parts of absolute ethanol at a temperature of 70°C;

[0036] (2) dye dissolution

[0037] Use 0.2 parts of parafuchsin cyanide as the dye of the radiochromic film, and use 13 parts of analytical pure methoxyethanol to dissolve the parafuchsin cyanide at room temperature and filter after dissolving; Cyanide was passed through a filter funnel and filtered with suction.

[0038] (3) mixing and stirring

[0039] Mix the solution obtained in step (1) and step (2), and add 0.5 parts of citric acid crystals and 2 parts of anhydrous acetic acid therein and mix and stir for 6 hours to make the mixed solution uniform;

[0040] (4) Spread film

[0041] Apply the solution obtained in step (3) evenly on the optical glass film-making ...

Embodiment 2

[0048] The same method and steps as in Example 1, except that the mass parts of nylon, dehydrated alcohol, parafuchsin cyanide, methoxyethanol, citric acid crystals, and anhydrous acetic acid are 10 parts, 120 parts, 0.5 parts respectively Servings, 30 servings, 3 servings, 5 servings.

[0049] The radiochromic film prepared by the process provided in Example 2 has a uniform thickness, a measurement repeatability of better than 1%, and a wide dose coverage range of 0.05 kGy to 50 kGy.

Embodiment 3

[0051] The same method and steps as in Example 1, except that the mass parts of nylon, dehydrated alcohol, parafuchsin cyanide, methoxyethanol, citric acid crystals, and anhydrous acetic acid are 10 parts, 150 parts, 0.8 parts respectively Servings, 50 servings, 5 servings, 8 servings.

[0052] The radiochromic film prepared by the process provided in Example 3 has a uniform thickness, a measurement repeatability of better than 1%, and a wide dose coverage range of 0.05 kGy to 40 kGy.

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PUM

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Abstract

The invention belongs to the technical field of dosage monitoring, and discloses a preparation technology of a radiation color changing film for monitoring dosage in radiation processing. The preparation technology comprises the following steps: (1) dissolving nylon with dehydrated alcohol; (2) dissolving pararosaniline cyanide with methyl cellosolve, and filtering the dissolved pararosaniline cyanide; (3) mixing dissolved solutions obtained in the step (1) and the step (2), adding citric acid crystals and an anhydrous acetic acid, and uniformly stirring the mixture; (4) uniformly coating a solution obtained in the step (3) on a film preparing plate which is adjusted to be level; (5) adding a sealing cover to the film preparing plate obtained in the step (4) so as to solidify a film, and after solidification, opening the sealing cover until the film is dried; (6) uncovering the film which is dried in the step (5) so as to obtain the radiation color changing film. The film is wide in the range of covering dosage, is good in thickness uniformity, and can be used for monitoring the dosage in a radiation processing process.

Description

technical field [0001] The invention belongs to the technical field of dose monitoring, and in particular relates to a preparation process of a radiochromic film used for dose monitoring in radiation processing. Background technique [0002] Radiochromic film is an organic solid film that can change color after receiving a certain dose of ionizing radiation. Because the radiochromic film has the advantages of wide dose response range, high spatial resolution, mailability and use as a delivery standard, Therefore, it is widely used in the measurement of medium and high doses in radiation processing. [0003] Among various radiochromic film dosimeters, the FWT-60 film dose meter produced by the American Far West Technology Co. The dosimetry performance of the meter is better, and it has become the best-selling product of Far West Company all over the world, but the preparation process and formula of this product are kept secret so far. Li Huazhi and others from the China Ins...

Claims

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Application Information

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IPC IPC(8): G01T1/10G01J1/58
Inventor 陈义珍李华芝李明叶宏生林敏徐利军夏文陈克胜张卫东
Owner CHINA INSTITUTE OF ATOMIC ENERGY