KR20160000105A

KR20160000105A - Radiation Indicator

Info

Publication number: KR20160000105A
Application number: KR1020140076925A
Authority: KR
Inventors: 김병국
Original assignee: 주식회사 안트라센
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2016-01-04

Abstract

The present invention provides a radiation indicator capable of indicating color when radiation with higher energy is radiated, and maintaining enough quality for long time by shielding peripheral light such as UV light. The radiation indicator comprises: a radiochromic material with performance of indicating a change in color, which detects ionizing radiation when the ionizing radiation with a higher energy is radiated; and a metallic oxide. The radiation indicator has an enough quality retention period since not being influenced for several months by an existing peripheral condition such as the peripheral light and not being influenced for a few days by sunlight. Moreover, the radiation indicator can be manufactured of the radiochromic material containing the metal oxide of an emulsion state such that various logos and directions can be applied thereto; and the radiation indicator can be manufactured in various shapes including a flat surface, a square, a rectangle, a triangle, and a hexagon, and positions.

Description

Radiation Indicator {Radiation Indicator}

The present invention relates to a radiation indicator for radiation detection. More particularly, the present invention relates to a radiation sensitive material such as a film, a sticker, or a medium for monitoring the dose of high energy radiation such as electrons, X-rays, protons, alpha particles and neutrons using a material sensitive to radiation such as diacetylene &Lt; / RTI >

High energy radiation, including those with energies in excess of 4 eV, such as UV light, X-rays, gamma rays, electrons, protons, alpha particles, neutrons, and laser light can be used to sterilize medicines and perishables, cure coatings, Image and information recording, radio-graphing, non-destructive testing and diagnostic and radiotherapy. It is necessary to monitor irradiation of these high energy radiation. Electronic devices that monitor radiation are expensive. A simple dose sum, which can be used to monitor from very low doses to very high doses, for example from 0.1 rad (rad) to 10 mrad (Mrad) of radiation with an energy of 100 MeV at 4 eV .

There is no doubt now that radiation can cause cancer. The problem is, what level of radiation will cause cancer. The risk of radiation exposure has been widely studied. Overall opinion on the induction of cancer by ionizing radiation is that if the dose is received in a short time, the incidence of cancer near 1 Sv increases by 10% and decreases to 5% if the dose is taken over a long period of time. 1 Sv is 1000 mSv, and 1 mSv is 100 mRem. Thus, a 10% increase in cancer incidence (5% if the dose is long-term) corresponds to a dose of 100,000 mRem. If you receive a harmful level of ionizing radiation (for example, 1 to 1,000 rads), you need to know the radiation dose on the spot, just as you would get appropriate medical attention. A dosimetry measuring doses higher than several thousand rads is reported (Standards on Dosimetry for Radiation Processing, ASTM International, 100 Barr Harbor Drive, West Conshohochen, PA, 2002), but not in the form of media. There is a need for a radiation dosimeter capable of instantly changing colors in the form of a medium, a bandage, a tape, a sticker, a label, etc., and estimating a dose from color intensity using a color reference chart.

A mixture of diacetylene, radiochromic dye, leuco and / or a pH sensitive dye and an acid-producing compound, etc., which undergo at least one detectable or monitorable change, such as color change, fluorescence, opacity and magnetic resonance, Mixture or the like is referred to as " radiation sensitive compound ", " radiation sensitive material ", " radiochromic material ", or " radiation sensitive preparation "

One group of materials that can be used in the present system is called diacetylene, R-C? C-C? C-R, including conjugated alkynes. Wherein R is a substituent. Diacetylene polymerizes to a solid state by thermal annealing or irradiation with high energy radiation. The term diacetylene as used herein refers to a group of compounds having at least one -C? C-C? C-functional group. The solid monomer is colorless or white. The partially polymerized diacetylene is blue or red. Polydiacetylenes look like metals, typically of the same color or gold. Polydiacetylenes are darker in color because the "π" electrons in the conjugated skeleton are non-stationary. The color intensity of the partially polymerized diacetylene is proportional to the percentage of polymer conversion.

It is known that diacetylene crystallizes into one or more crystal formulas or phases. The rapidly polymerized phase is expressed as an active phase or an active phase. The non-polymerized phase is represented by an inert phase or an inert phase. Depending on the phase, little or no polymerization is exhibited by thermal annealing. This phase is represented by a thermal inert phase. Immediately after the irradiation, the polymerizing phase is represented by the irradiation active phase. By choosing a suitable solvent system, some diacetylenes such as diacetylene-344 [RC? CC? CR, where R = OCONH (CH 2) 3 CH 3] are converted to a very low thermally active and detectable color By color development, it is possible to crystallize, for example, into a phase having a high radiation activity for monitoring low doses of Surad.

Diacetylene is not sensitive to long wavelength radiation of visible light. Luckey and Boer disclose diacetylene photosensitive members comprising an inorganic salt such as titanium dioxide, zinc oxide, cadmium iodide, and cadmium sulfide as sensitizers for sensitizing to visible light in U.S. Patent No. 3,772,027. Other such patents granted to Fico and Manthey (US Pat. No. 3,772,028) disclose photosensitive members that are rendered photosensitive to visible light by addition of pyruvate salts, including pyruvate pyrrhinium salt and serranaphyrrhic acid salt. Amplification of insufficient imaging of the crystalline diacetylene composition can be given to U.S. Patent No. 3,794,491 to Borsenberger et al. A faint image is enhanced by post-exposure irradiation. These patents describe a formulation and process for sensitizing diacetylene to radiation of lower energy to longer wavelengths of visible light such that the film can be used as a photographic film of visible light. U.S. Pat. No. 5,420,000 reports the increase and decrease of diacetylene for shorter wavelengths, ie higher energy radiation, such as UV, X-ray, electron and alpha particles. This increase or decrease in the radiation of higher energy is preferable, for example, in the production of a diagnostic X-ray film.

The inventors of the present invention have developed a radiation indicator that emits light instantaneously. The color increases with dose. Under normal ambient conditions such as ambient light, it is not affected for several months and for solar light for several days. The dose sum has a sufficient quality retention period of several years to several years depending on the radiation sensitive preparation.

Materials such as plastic films coated with radio-chromic materials are often represented by members or radiation-sensitive lines. The dose total or the medium is defined as a device including the member or the sensing line. The dose sum may have a color reference chart for estimating the dose.

An object of the present invention is to provide a radiation indicator capable of coloring when irradiated with radiation having a higher energy and shielding ambient light such as UV to maintain sufficient quality for a long period of time.

In order to achieve the above object, the present invention provides a radiochromic material having a capability of developing a detectable color change when irradiated with ionizing radiation having a high energy; And a metal oxide.

The metal oxide may include at least one of titanium dioxide (TiO ₂ ), zinc oxide (ZnO), and bismuth trioxide (Bi ₂ O ₃ ).

The radiochromic material may comprise a diacetyl mixture.

The radiochromic material containing the metal oxide may be in an emulsion state.

The radiochromic material comprising the metal oxide may be printed in a variety of forms and locations.

The radiation indicator according to the present invention may have a sufficient quality retention period because it is not affected by ordinary ambient conditions such as ambient light for several months and sunlight for several days. In addition, the radiation indicator according to the present invention can be manufactured from a radio-chromic material containing a metal oxide in an emulsion state, and various logos and instructions can be combined on the indicator to indicate the date, user, order of radiation reaction, And can be made in various shapes and positions including flat, square, rectangular, triangular, and hexagonal.

1 is a conceptual diagram of a radiation indicator according to the present invention.
2 is a utilization diagram for a radiation indicator according to the present invention.
Figure 3 is another utilization of the radiation indicator according to the present invention.

Hereinafter, a radiation indicator according to one embodiment of the present invention will be described in detail. However, the present invention is not limited to the following embodiments, and any person skilled in the art will understand that the scope of the present invention is not limited to The present invention may be embodied in various other forms. That is, it should be understood that all changes, equivalents, and alternatives included in the spirit and scope of the present invention are included.

1 is a conceptual diagram of a radiation indicator according to the present invention. 1, a radiation indicator according to the present invention includes a state in which a metal oxide is mixed in a radiochromic material 1 having a capability of developing a detectable color change when irradiated with high-energy ionizing radiation .

At this time, the radiochromic material (1) according to an embodiment of the present invention may be made of a diacetyl mixture. The metal oxide may include at least one of titanium dioxide (TiO ₂ ), zinc oxide (ZnO), and bismuth trioxide (Bi ₂ O ₃ ).

The radio-chromic material 1 mixed with the metal oxide according to an embodiment of the present invention is preferably in an emulsion state. Accordingly, the radiation indicator according to an embodiment of the present invention can be manufactured by printing in various shapes and positions.

2 and 3 are utilization diagrams for a radiation indicator according to the present invention. 2 and 3, the radiation indicator according to the present invention may be displayed with different degrees of color development depending on the dose of radiation. In addition, the radiation indicator according to the present invention may display not only color but also letters or the like.

1: Radio Chromatic Material

Claims

A radiochromic material having the ability to develop a detectable color change when irradiated with ionizing radiation having a high energy; And
Metal oxide
Radiation indicators including.

The method according to claim 1,
Wherein the metal oxide comprises at least one of titanium dioxide, zinc oxide and bismuth trioxide.

The method according to claim 1,
Characterized in that the radiochromic material comprises a diacetyl mixture.

The method according to claim 1,
Wherein the radiochromic material comprising the metal oxide is in an emulsion state.

5. The method of claim 4,
Wherein the radiochromic material comprising the metal oxide is printed in various forms and locations.