JPS63191087A - Radiation dosimeter - Google Patents
Radiation dosimeterInfo
- Publication number
- JPS63191087A JPS63191087A JP2291487A JP2291487A JPS63191087A JP S63191087 A JPS63191087 A JP S63191087A JP 2291487 A JP2291487 A JP 2291487A JP 2291487 A JP2291487 A JP 2291487A JP S63191087 A JPS63191087 A JP S63191087A
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- bromide
- change
- irradiation
- paint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 35
- 239000003973 paint Substances 0.000 claims abstract description 15
- -1 bromine compound Chemical class 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical group CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 11
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 9
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- JCYPECIVGRXBMO-UHFFFAOYSA-N 4-(dimethylamino)azobenzene Chemical compound C1=CC(N(C)C)=CC=C1N=NC1=CC=CC=C1 JCYPECIVGRXBMO-UHFFFAOYSA-N 0.000 claims description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical class CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 3
- 239000001294 propane Substances 0.000 claims description 3
- ZPLCXHWYPWVJDL-UHFFFAOYSA-N 4-[(4-hydroxyphenyl)methyl]-1,3-oxazolidin-2-one Chemical compound C1=CC(O)=CC=C1CC1NC(=O)OC1 ZPLCXHWYPWVJDL-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 125000001246 bromo group Chemical group Br* 0.000 claims description 2
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- PRZSXZWFJHEZBJ-UHFFFAOYSA-N thymol blue Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C PRZSXZWFJHEZBJ-UHFFFAOYSA-N 0.000 claims description 2
- UDSAIICHUKSCKT-UHFFFAOYSA-N bromophenol blue Chemical compound C1=C(Br)C(O)=C(Br)C=C1C1(C=2C=C(Br)C(O)=C(Br)C=2)C2=CC=CC=C2S(=O)(=O)O1 UDSAIICHUKSCKT-UHFFFAOYSA-N 0.000 claims 1
- 229920002689 polyvinyl acetate Polymers 0.000 abstract description 8
- 239000011118 polyvinyl acetate Substances 0.000 abstract description 8
- GZUXJHMPEANEGY-UHFFFAOYSA-N bromomethane Chemical compound BrC GZUXJHMPEANEGY-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011342 resin composition Substances 0.000 abstract description 4
- MPPPKRYCTPRNTB-UHFFFAOYSA-N 1-bromobutane Chemical compound CCCCBr MPPPKRYCTPRNTB-UHFFFAOYSA-N 0.000 abstract description 2
- CYNYIHKIEHGYOZ-UHFFFAOYSA-N 1-bromopropane Chemical compound CCCBr CYNYIHKIEHGYOZ-UHFFFAOYSA-N 0.000 abstract description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 abstract description 2
- RDHPKYGYEGBMSE-UHFFFAOYSA-N bromoethane Chemical compound CCBr RDHPKYGYEGBMSE-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229940102396 methyl bromide Drugs 0.000 abstract description 2
- 239000007793 ph indicator Substances 0.000 abstract description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 2
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000008096 xylene Substances 0.000 abstract description 2
- 230000002285 radioactive effect Effects 0.000 abstract 2
- 238000002845 discoloration Methods 0.000 description 16
- 239000000975 dye Substances 0.000 description 7
- DIKBFYAXUHHXCS-UHFFFAOYSA-N bromoform Chemical compound BrC(Br)Br DIKBFYAXUHHXCS-UHFFFAOYSA-N 0.000 description 6
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 229950005228 bromoform Drugs 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- XFNJYAKDBJUJAJ-UHFFFAOYSA-N 1,2-dibromopropane Chemical compound CC(Br)CBr XFNJYAKDBJUJAJ-UHFFFAOYSA-N 0.000 description 1
- VEFLKXRACNJHOV-UHFFFAOYSA-N 1,3-dibromopropane Chemical compound BrCCCBr VEFLKXRACNJHOV-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical class [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical group O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 description 1
- INLLPKCGLOXCIV-UHFFFAOYSA-N bromoethene Chemical compound BrC=C INLLPKCGLOXCIV-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- FJBFPHVGVWTDIP-UHFFFAOYSA-N dibromomethane Chemical group BrCBr FJBFPHVGVWTDIP-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000009930 food irradiation Methods 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、放射線線量計に関する。さらに詳細には、
電子線、γ線等の電離放射線の照射線量を簡単に測定で
きる、放射線変色塗料を使用した放射線線量計に関する
。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a radiation dosimeter. In more detail,
The present invention relates to a radiation dosimeter using radiation color-changing paint that can easily measure the irradiation dose of ionizing radiation such as electron beams and gamma rays.
〈従来の技術〉
近年、放射線の工業利用は、食品の保存、医療器具の滅
菌、電線、収縮チューブなどのプラスチックの架橋等と
、非常に広範囲の産業分野に渡っている。これらの放射
線の利用に際しては、放射線の多少が、得られる効果に
大きな影響を及ぼすので、対象物質に照射された放射線
量を知ることが重要である。この放射線量を測定する方
法としては、三酢酸セルロースフィルム（ＣＴＡ ）
線量計、ポリメチルメタクリレ−） （ＰＭＭＡ）線量
計、フルーセロファン線量計、ラジオクロミックｍ ｔ
ｃ 計等が知られている。さらに、ポリ塩化ビニルをベ
ースとした放射線変色テープも知られている。<Prior Art> In recent years, industrial use of radiation has spread to a very wide range of industrial fields, such as food preservation, sterilization of medical instruments, and crosslinking of plastics such as electric wires and shrink tubes. When using these types of radiation, it is important to know the amount of radiation irradiated to the target material, since the amount of radiation greatly affects the effect obtained. A method for measuring this radiation dose is cellulose triacetate film (CTA).
Dosimeter, polymethyl methacrylate (PMMA) dosimeter, Flucellophane dosimeter, Radiochromic m t
c total etc. are known. Furthermore, radiation-changing tapes based on polyvinyl chloride are also known.
〈発明が解決しようとする問題点〉
上記のＣＴＡ 、 ＰＭＭＡ 、ブルーセロファン等の
線量計にあっては、放射線照射後、紫外線吸光度計で吸
光度の変化を測定するなどして、放射線量を測定するの
で、簡便な線量計とは言いがたい。一方、上記の放射線
変色テープにあっては、１〜ｌＯＭｒａｄ の照射線
量においては変色が比較的鮮明であるが、照射量がｌ
Ｍｒａｄ 以下では変色感度が鈍く、照射線量と変色
の関係が不明瞭となる。<Problems to be Solved by the Invention> In the above-mentioned dosimeters such as CTA, PMMA, and blue cellophane, the radiation dose is measured by measuring the change in absorbance with an ultraviolet absorbance meter after irradiation with radiation. Therefore, it cannot be called a simple dosimeter. On the other hand, with the above-mentioned radiation discoloration tape, the discoloration is relatively clear at an irradiation dose of 1 to 1 O Mrad;
Below Mrad, the discoloration sensitivity is low and the relationship between the irradiation dose and the discoloration becomes unclear.
従って、Ｉ Ｍｒａｄ 以上の照射量で照射する分野
では利用できるが、食品照射等のＩ Ｍｒａｄ 以下
の照射量が要求される分野では使用できないという欠点
がある。Therefore, although it can be used in fields that require irradiation with a dose of I Mrad or more, it has the disadvantage that it cannot be used in fields that require a dose of radiation below I Mrad, such as food irradiation.
この発明は、上記の問題点に鑑みなされたもので、非常
に簡便にして、低線量の放射線量が測定可能な放射線線
量計を提供するものである。The present invention has been made in view of the above-mentioned problems, and provides a radiation dosimeter that can measure low doses of radiation in a very simple manner.
く問題を解決するための手段〉
上記の問題点を解決すべくなされた、この発明にかか・
る放射線線量計は、高分子樹脂成形物よりなる基板とそ
の基板上に形成された放射線変色塗料層とからなり、該
放射線変色塗料は、分子内に酢酸基を含有するポリマー
、ｐＨの変化により変色する色素及びメタン、エタン、
プロパン又はブタンの水素のうち少なくとも１つ以上臭
素で置換した臭素化合物を含有することを特徴とする。Means for Solving the Problems> This invention, which was made to solve the above problems, has the following features:
The radiation dosimeter consists of a substrate made of a polymer resin molding and a radiation color changing paint layer formed on the substrate. Color changing dyes and methane, ethane,
It is characterized by containing a bromine compound in which at least one hydrogen of propane or butane is replaced with bromine.
この発明にあって、基板となる高分子樹脂成形物におけ
る材料としては、汎用の高分子物質の何れもが使用でき
るが、塗布される酢酸基を含むポリマーをペースとした
塗料との接着性などの面かラポリエチレンテレフタレー
ト、ポルスルフォン、ポリエーテルスルフォン、各種紙
類等が好ましく、また形状も特に限定されないが、変色
の確認の容易性から無色（白色）、透明のフィルム状又
はシート状が好ましい。In this invention, any general-purpose polymer substance can be used as the material for the polymer resin molded product that serves as the substrate, but the adhesion to the paint based on a polymer containing an acetic acid group to be applied, etc. Polyethylene terephthalate, porsulfone, polyethersulfone, various papers, etc. are preferred, and the shape is not particularly limited, but a colorless (white) or transparent film or sheet is preferred from the viewpoint of ease of checking for discoloration. .
この高分子基板上に形成される放射線変色塗料層におけ
る放射線変色塗料とは、放射線の照射により変色（発色
、消色または色調の変化）する塗料をいい、この発明に
あっては、分子内に酢酸基を含有するポリマー、ｐＨの
変化により変色する色素およびメタンを臭素化した化合
物を主成分として含有する。The radiation color changing paint in the radiation color changing paint layer formed on the polymer substrate refers to a paint that changes color (coloring, decoloring, or change in color tone) when irradiated with radiation. The main components are a polymer containing an acetic acid group, a dye that changes color due to changes in pH, and a brominated methane compound.
分子内に酢酸基を含有するポリマーとしては、ポリ酢酸
ビニル、エチレン−酢酸ビニル共重合体、酢酸ビニル−
塩化ビニル共重合体、エチレン−酢酸ビニル−塩化ビニ
ルグラフトマー等である。Examples of polymers containing acetic acid groups in the molecule include polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl acetate-
These include vinyl chloride copolymers, ethylene-vinyl acetate-vinyl chloride graftomers, and the like.
また、ｐＨの変化により変色する色素としては、ｐＨの
変化により色が変わるものであれば、何れのものも使用
でき、例えば、ｐＨ指示薬などが挙げられる。特に、フ
ェノールフタレイン、メチルイエロー、ブロモチモール
ブルー、フロ、モフェノールブルー、チモールブルーお
よびメチルレッドからなる群より選ばれた１種または２
種以上の混合物を使用すると、放射線照射後における色
の変化が顕著で好ましい。Further, as the dye that changes color due to a change in pH, any dye that changes color due to a change in pH can be used, and examples thereof include pH indicators. In particular, one or two selected from the group consisting of phenolphthalein, methyl yellow, bromothymol blue, furo, mophenol blue, thymol blue, and methyl red.
It is preferable to use a mixture of more than one species because the color change after radiation irradiation is noticeable.
メタン、エタン、プロパン又はブタンを臭素化した化合
物としては、臭化エチル、臭化エチレン、臭化トリメチ
レン、臭化ビニル、臭化ブチル、臭化プロピル、臭化プ
ロピレン、ブロムフォルム、臭化メチルおよび臭化メチ
レンがある。これらの臭素化合物を添加することにより
、放射線照射による変色が鮮明になる。特にこのなかで
もブロモフォルムは、照射変色が著しく線量計として好
ましい。Brominated compounds of methane, ethane, propane or butane include ethyl bromide, ethylene bromide, trimethylene bromide, vinyl bromide, butyl bromide, propyl bromide, propylene bromide, bromoform, methyl bromide and There is methylene bromide. By adding these bromine compounds, discoloration caused by radiation exposure becomes clearer. Among these, bromoform is particularly preferred as a dosimeter because of its remarkable discoloration upon irradiation.
上記の分子内に酢酸基を含有するポリマー、ｐＨの変化
により変色する色素および臭素化合物の混合比率は、特
に限定されず、使用される色素類、ポリマ一種、放射線
量−変色域の設定値等により適宜選択される。The mixing ratio of the above-mentioned polymer containing an acetate group in the molecule, the dye that changes color due to changes in pH, and the bromine compound is not particularly limited, and the dyes used, the type of polymer, the radiation dose - the set value of the discoloration area, etc. is selected as appropriate.
この発明にかかる放射線線量計は、上記の分子内に酢酸
基を含有するポリマー、ｐＨの変化に上り変色する色素
および臭素化合物に必要に応じて分散剤、フィラー等を
添加した後、該ポリマーの良溶媒（例えば、酢酸ビニル
樹脂にあっては、キシレン、メチルエチルケトンなど）
等に溶解または分散させ、放射線変色塗料としたのち、
前記の高分子樹脂成形物基板上に慣用の手段で塗布し、
乾操することにより製造される。The radiation dosimeter according to the present invention is produced by adding a dispersant, a filler, etc. as necessary to the above-mentioned polymer containing an acetate group in the molecule, a dye that changes color due to a change in pH, and a bromine compound. Good solvent (for example, xylene, methyl ethyl ketone, etc. for vinyl acetate resin)
After dissolving or dispersing it into a radiation color changing paint,
Coating the above-mentioned polymer resin molded product onto the substrate by conventional means,
Manufactured by drying.
く作 用〉
この発明にかかる放射線線量計は、上記の構成よりなり
、放射線が照射されると、酢酸基を含有するポリマーか
ら酢酸が脱離し、生じた水素イオンがｐＨの変化をもた
らすので、ｐＨの変化により変色する色素が変色する。Function> The radiation dosimeter according to the present invention has the above configuration, and when irradiated with radiation, acetic acid is desorbed from the polymer containing acetic acid groups, and the generated hydrogen ions cause a change in pH. Pigments that change color due to changes in pH change color.
生成する酢酸の量は、放射線量と相関し、従って放射線
量とｐＨの変化量も相関するので、変色域を適宜設定す
れば、変色の程度により放射線量の測定ができる。また
、臭素化合物は、生成する臭素酸がｐＨの変化を促進す
るので、変色域の調整および拡大が可能となる。The amount of acetic acid produced correlates with the radiation dose, and therefore the radiation dose and the amount of change in pH also correlate, so if the discoloration area is appropriately set, the radiation dose can be measured based on the degree of discoloration. In addition, since the bromine compound produces bromic acid that promotes changes in pH, it is possible to adjust and expand the range of discoloration.
以下に実施例をもって本発明の説明を行う。The present invention will be explained below with reference to Examples.
〈実施例〉
実施例−１゜
ポリ酢酸ビニルに対しメチルイエローラ２．５ＰＨＲ添
加した樹脂組成物に、臭素化合物として、ブロムフォル
ムをポリ酢酸ビニルに対し、３０ＰＨＲ添加し、酢酸ブ
チルに溶解し照射変色塗料となした。<Example> Example-1゜To a resin composition in which 2.5 PHR of Methyl Yellowa was added to polyvinyl acetate, 30 PHR of bromoform was added to polyvinyl acetate as a bromine compound, dissolved in butyl acetate, and irradiated. Made with color-changing paint.
５０１１ ｍのポリエステルフィルムに、該照射変色塗
料を５μｍ塗布し、乾燥後、０．４ＭｅＶの電子線をＱ
、ＩＭｒａｄ照射し変色の程度を確認した。この照射に
よる変色は、未照射では黄色が０４Ｍｒａｄの照射で赤
色に変化した。A 5011 m polyester film was coated with 5 μm of the irradiation color-changing paint, and after drying, a 0.4 MeV electron beam was applied to the Q
, IMrad irradiation was performed to confirm the degree of discoloration. The discoloration caused by this irradiation was such that when not irradiated, the yellow color changed to red when irradiated with 04 Mrad.
実施例−２゜
ポリ酢酸ビニルに対し、ブロモクレゾールグリーンを２
．５ ＰＨＲ添加した樹脂組成物に臭化エチレンをポリ
酢酸ビニルに対し、３０ＰＨＲ添加し、テトラヒドロフ
ランに溶解し、照射変色塗料となした。該照射変色塗料
を実施例−１と同様にポリエステルフィルム上に塗布し
たのち照射し、変色の程度を確認した。この照射による
変色は、未照射では黄緑であったが、０．１Ｍｒａｄの
照射で橙色に変色した。Example-2゜Bromocresol green was added to 2゜ polyvinyl acetate.
．． 30 PHR of ethylene bromide was added to polyvinyl acetate to the resin composition to which 5 PHR was added, and the mixture was dissolved in tetrahydrofuran to obtain a color-changing paint by irradiation. The irradiation discoloration paint was applied onto a polyester film in the same manner as in Example 1, and then irradiated to check the degree of discoloration. The color change due to this irradiation was yellow-green when not irradiated, but changed to orange when irradiated with 0.1 Mrad.
実施例−３゜
ポリ酢酸ビニルに対し、メチルイエローラ０．ＩＰＨＲ
添加した樹脂組成物に臭化プニピレンをポリ酢酸ビニル
に対し３０ ＰＨＲ添加し、酢酸エチルに溶解し、照射
変色塗料となした。ポリエステルフィルム上に実施例−
１と同様に塗布し、照射後、変色の程度を確認した。０
．１ Ｍｒａｄの照射により、黄色から赤に変色した。Example - 3° polyvinyl acetate and 0.0% methyl yellow la. IPHR
Punipyrene bromide was added to the added resin composition in an amount of 30 PHR based on polyvinyl acetate, and dissolved in ethyl acetate to obtain an irradiation color-changing paint. Example on polyester film-
It was applied in the same manner as in 1, and after irradiation, the degree of discoloration was confirmed. 0
．． Upon irradiation with 1 Mrad, the color changed from yellow to red.
〈発明の効果〉
以上のように、この発明の放射線線量計は、簡便に且つ
より精度のよい低線量の照射量測定が可 。<Effects of the Invention> As described above, the radiation dosimeter of the present invention enables simple and more accurate low-dose irradiation measurement.
能である。It is Noh.
Claims (2)
有するポリマー、ｐＨの変化により変色する色素および
メタン、エタン、プロパン又はブタン誘導体の水素のう
ち少なくとも１つ以上を臭素で置換した臭素化合物を含
有する放射線変色塗料層を形成したことを特徴とする放
射線線量計。(1) On a substrate made of a polymer resin molding, at least one of a polymer containing an acetate group, a dye that changes color due to a change in pH, and hydrogen in a methane, ethane, propane, or butane derivative is replaced with bromine. A radiation dosimeter characterized by forming a radiation color-changing paint layer containing a bromine compound.
タレイン、メチルイエロー、ブロモチモールブルー、ブ
ロモフェノールブルー、チモールブルーおよびメチルレ
ッドからなる群より選ばれた１種または２種以上の混合
物である特許請求の範囲第（１）項記載の放射線線量計
。(2) A patent in which the pigment that changes color due to a change in pH is one or a mixture of two or more selected from the group consisting of phenolphthalein, methyl yellow, bromothymol blue, bromophenol blue, thymol blue, and methyl red. A radiation dosimeter according to claim (1).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2291487A JPH0672929B2 (en) | 1987-02-02 | 1987-02-02 | Radiation dosimeter |
| CA000553469A CA1301959C (en) | 1986-12-04 | 1987-12-03 | Dosimeter |
| US07/760,841 US5099132A (en) | 1986-12-04 | 1991-09-17 | Dosimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2291487A JPH0672929B2 (en) | 1987-02-02 | 1987-02-02 | Radiation dosimeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63191087A true JPS63191087A (en) | 1988-08-08 |
| JPH0672929B2 JPH0672929B2 (en) | 1994-09-14 |
Family
ID=12095907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2291487A Expired - Fee Related JPH0672929B2 (en) | 1986-12-04 | 1987-02-02 | Radiation dosimeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672929B2 (en) |
-
1987
- 1987-02-02 JP JP2291487A patent/JPH0672929B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0672929B2 (en) | 1994-09-14 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |