Scintillator film for real-time X-ray dosimeter as well as preparation method and application of scintillator film

Abstract

The invention provides a scintillator film for a real-time X-ray dosimeter as well as a preparation method and application of the scintillator film. The preparation method comprises the following steps: weighing Eu (NO3) 3.6 H2O, Tb (NO3) 36H2O, Lu (NO3) 36H2O, NaF and NH4F to prepare powder B; preparing a rare earth fluoride material C from the powder B; weighing a polydimethylsiloxane prepolymer and a curing agent, adding the polydimethylsiloxane prepolymer and the curing agent into a cyclohexane solution, and performing ultrasonic dispersion to obtain a mixture D; adding the rare earth fluoride material C and PMMA particles into an ethanol solution, and uniformly dispersing to obtain a mixture E; dropwise adding the mixture E into the stirred mixture D, and performing vacuum mixing to obtain a mixture F; and transferring the mixture F to the surface of a ceramic plate which is respectively cleaned by water, ethanol and acetone and dried, coating to form a thin film, heating and annealing, and cooling to obtain the flexible scintillator thin film NaLuF4: Tb < 3 + > / Eu < 3 + > coated PDMS which is used for a real-time X-ray dosimeter.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of radiation dosimeter sensing, and particularly relates to a scintillator film for real-time X-ray dosimeter, and a preparation method and application thereof. BACKGROUND

[0002] Ionizing radiation plays an important role in many key areas of modern society, such as CT imaging in the medical field, radiotherapy, and the nuclear energy field. However, excessive exposure to ionizing radiation can pose a serious threat to living organisms. The deposition of radiation energy in biological tissue can directly or indirectly cause damage at the cellular and molecular levels, and further induce a series of harmful biological effects such as cell apoptosis, gene mutation, and cancer. In view of the above risks, it is of great significance to monitor ionizing radiation in the environment for occupational safety, environmental radiation emergency response, and public health maintenance. Among them, real-time radiation dose monitoring is particularly critical, which can dynamically reflect the instantaneous radiation level and change trend, and provide immediate basis for radiation protection intervention, health risk warning, and emergency response. In the real-time dose rate monitoring system, the scintillator material is the core functional element, and its performance directly determines the monitoring accuracy and reliability. As a kind of sensing material that can convert high-energy radiation energy into visible light signal, scintillator is the key core material in the real-time dose rate monitoring platform.

[0003] As a commonly used scintillator material in real-time dose rate monitoring technology, CsI: Tl, NaI: Tl, and BGO still have a series of inherent defects in practical application. First, CsI: Tl and NaI: Tl contain toxic heavy metal element Tl, which poses potential risks to personnel health and ecological environment during material synthesis and preparation. Second, the synthesis of CsI: Tl and BGO usually needs to be carried out under high temperature conditions, which not only has high energy consumption and complex process control, but also limits its molding and application in large area or flexible devices. In addition, CsI: Tl itself has poor chemical stability and is easy to absorb moisture, leading to performance degradation, while BGO is easy to cause lattice damage under long-term irradiation in strong radiation field, causing light emission performance attenuation. More importantly, the above-mentioned materials have low response sensitivity and slow response speed to dose rate changes in dynamic radiation field, which is difficult to meet the requirements of real-time monitoring for accuracy and timeliness in complex radiation environment. Therefore, it is urgent to develop flexible scintillator materials with high stability to realize the application of real-time X-ray dosimeter and further promote the integrated deployment of intelligent monitoring system, thereby showing important research value and application significance in the field of radiation protection. SUMMARY

[0004] The present application aims to provide a scintillator film for real-time X-ray dosimeter and a preparation method and application thereof, so as to overcome the shortcomings of the prior art, and the present application provides a flexible scintillator film with fast response, high sensitivity and excellent structural stability. The film can be integrated into a real-time radiation dosimeter and its intelligent monitoring system, has the advantages of low-temperature processability, environmental friendliness, simple preparation process and controllable cost, and can significantly improve the real-time monitoring accuracy and reliability in complex radiation environment.

[0005] The present application is realized by the following technical solutions: A preparation method of a scintillator film for real-time X-ray dosimeter, comprising the following steps: 1) weigh Eu(NO3)3.6H2O, Tb(NO3)3 6H2O, Lu(NO3)3 6H2O, NaF and NH4F are sheared and dispersed at high speed, then solution A is added and fully mixed and dispersed to obtain a viscous mixture, and then powder B is obtained by microwave drying; 2) put the powder B into an induction heating stirring kettle, and put several carbon balls with a predetermined diameter into the kettle, then put the induction heating stirring kettle into an induction heating stirring device, so that the whole system gradually rises from room temperature to the target temperature and keeps constant temperature reaction, after the reaction is completed, take out the carbon balls, and then wash, centrifuge and dry the obtained reaction product to obtain a rare earth fluoride material C; 3) weigh the polydimethylsiloxane prepolymer and the curing agent in a mass ratio of (8-13):1, add them into a cyclohexane solution and ultrasonic disperse to obtain a mixture D; add the rare earth fluoride material C and PMMA particles into an ethanol solution and disperse uniformly to obtain a mixture E; add the mixture E into the stirring mixture D in a volume ratio of 2:1, and vacuum mix for 40-90 min to obtain a mixture F; 4) transfer the mixture F to the surface of a ceramic plate washed with water, ethanol and acetone respectively and dried, coat to form a thin film, and then heat and anneal, and obtain a flexible scintillator film NaLuF4:Tb 3+ / Eu 3+ @PDMS for real-time X-ray dosimeter.

[0006] Further, the NH4F, NaF, Lu(NO3)3 6H2O, Tb(NO3)3 The molar ratio of 6H2O to Eu(NO3)3·6H2O is (1~9):(5~20):(50~80):(100~300):(300~500); Solution A is ethanol or acetone; the ratio of solution A to NaF is 3~6 mL:0.1 g; the high-speed shear dispersion speed is 15000 rpm, and the duration is 1~5 min; the microwave drying power is 700W, and the duration is 1~3 min.

[0007] Further, in step 2), three carbon balls with a diameter of 0.5 cm are added.

[0008] Furthermore, in step 2), the stirring conditions are 300~500 rpm, with an induction frequency of 300~500 KHz, to raise the temperature from room temperature to 100~300 ℃ and keep it at that temperature for 0.5~2.5 h.

[0009] Further, in step 3), 4-8 g of a mixture of dimethylsiloxane prepolymer and curing agent are added to every 5 mL of cyclohexane solution.

[0010] Further, in step 3), the PMMA particle size is 1~5 mm, the mass ratio of rare earth fluoride material C to PMMA particles is 1:3, and 2~4 g of a mixture of rare earth fluoride material C and PMMA particles is added to every 5 mL of ethanol solution.

[0011] Furthermore, in step 4), an electric doctor blade is used to coat the film, with a distance of 50~1000 μm between the electric doctor blade and the ceramic plate, and a coating speed of 1~5 m / min. The annealing temperature is controlled at 50~150 °C, and the annealing time is 10~50 min.

[0012] A scintillator thin film for a real-time X-ray dosimeter is prepared using the above-described method.

[0013] An application of a scintillator thin film for a real-time X-ray dosimeter in an intelligent monitoring system, the intelligent monitoring system being used for real-time X-ray dose measurement.

[0014] Furthermore, the intelligent monitoring system includes a fiber optic spectrometer, a scintillator film, and a terminal device. In use, after the scintillator film is irradiated with X-rays, the fiber optic spectrometer collects the light signal emitted by the scintillator film, and then the light signal is wirelessly transmitted to the terminal device via a WiFi module, enabling real-time display of the spectrum and dose rate.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: 1. This invention proposes a method based on rare earth fluoride NaLuF4:Tb 3+ / Eu3+ Highly efficient scintillator sensing materials. Tb is introduced into the matrix material NaLuF4. 3+ With Eu 3+ Rare earth ions, through the energy matching relationship between their 4f energy levels, enable the irradiation excitation energy to be increased from Tb. 3+ The excited state towards Eu 3+ The excited state is efficiently transferred. This energy transfer process significantly enhances Eu. 3+ The radiative transition probability is increased, improving transient luminescence efficiency. Meanwhile, Eu... 3+ The addition of [a specific ingredient] can consume the charge carriers released in the trap, suppress the long afterglow component originally present in the material, and enable the material to quickly return to the ground state after X-ray irradiation stops, thereby achieving fast-response scintillation behavior. Based on this, the present invention [includes / contains] NaLuF4:Tb 3+ / Eu 3+ Combined with PDMS elastic system, NaLuF4:Tb is constructed. 3+ / Eu 3+ @PDMS flexible scintillator film. PDMS possesses low modulus, high tensile strength, and excellent interfacial wetting ability, making NaLuF4:Tb... 3+ / Eu 3+ The microparticles can be uniformly fixed in an elastic network and maintain stable luminescence performance. The composite film can maintain structural integrity and optical output stability under bending, twisting, or repeated cyclic deformation conditions, without powder migration, peeling, or optical signal attenuation due to mechanical stress. This flexible structure can closely conform to complex curved surfaces, such as curved pipes, cylinders, biological tissues, or irregular equipment surfaces, significantly expanding the real-time radiation monitoring capabilities of scintillators in non-flat environments.

[0016] 2. This invention proposes a powder dispersion method based on PMMA particles. This method disperses NaLuF4:Tb 3 + / Eu 3+ The powder is first dispersed in an ethanol solution, followed by the addition of PMMA particles. The PMMA particles are then propelled at high speed by a flow field generated by the rotation of a magnetic stirrer. Under magnetic stirring, the PMMA particles continuously collide and rub against the powder, gradually disintegrating and redispersing the agglomerated particles. This process significantly reduces the powder particle size and inhibits re-agglomeration, resulting in a stable and uniform dispersion system. This provides a reliable microstructure basis for the subsequent film formation of flexible thin-film dosimeters and improves film quality.

[0017] 3. The NaLuF4:Tb proposed in this invention 3+ / Eu 3+The PDMS flexible film can operate in conjunction with a self-developed real-time radiation monitoring system for continuous acquisition and analysis of X-ray dose rates. By embedding a wireless communication module within the system, the detected signals can be transmitted to an external terminal in a timely manner, enabling remote reading and dynamic management of the radiation dose rate. Experimental results show that the flexible film exhibits stable optical response and good real-time performance under different dose rate conditions, meeting the intelligent monitoring needs of radiation protection in various scenarios and possessing potential for further engineering and application expansion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. The following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 NaLuF4:Tb prepared in Example 1 3+ / Eu 3+ XRD pattern of a PDMS flexible scintillator film; Figure 2 NaLuF4:Tb prepared in Example 2 3+ / Eu 3+ XRD pattern of a PDMS flexible scintillator film; Figure 3 NaLuF4:Tb prepared in Example 3 3+ / Eu 3+ XRD pattern of a PDMS flexible scintillator film; Figure 4 NaLuF4:Tb prepared in Examples 1-3 3+ / Eu 3+ Radiation emission of PDMS flexible scintillator film under X-ray irradiation; Figure 5 NaLuF4:Tb prepared in Examples 1-3 3+ / Eu 3+ Flexible luminescence image of PDMS flexible scintillator film under 365nm ultraviolet irradiation; Figure 6 NaLuF4:Tb prepared in Example 2 3+ / Eu 3+ Cyclic stress-strain diagram of a PDMS flexible scintillator film; Figure 7 NaLuF4:Tb prepared in Example 2 3+ / Eu 3+Comparison of dose response curves between powder and commercially available CsI:Tl, BGO and LYSO scintillator materials; Figure 8(a) is a model scheme diagram of the intelligent platform constructed in Example 2 for monitoring real-time radiation dose levels; Figure 8(b) illustrates the use of an intelligent platform in Example 2 at 85.84 mGy. air ·s -1 The graph shows the real-time dose rate stability results after 15 cycles of radiation dose rate testing. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise specified, the methods and experimental equipment used in the following embodiments are conventional methods and instruments.

[0021] Example 1 A method for preparing a scintillator thin film for a real-time X-ray dosimeter includes the following steps: 1) High-purity Eu(NO3)3·6H2O and Tb(NO3)3 6H2O, Lu(NO3)3 6H2O, NaF and NH4F were added to a high-speed shear disperser in a molar ratio of 1:5:50:100:300. Then, ethanol was added to the disperser at a ratio of 3 mL:0.1 g to NaF. The mixture was then mixed and dispersed at 15,000 rpm for 1 min, and then microwaved at 700W for 1 min to obtain powder B. 2) Place powder B into an induction heating stirred tank and add three carbon balls with a diameter of 0.5 cm. Then place the induction heating stirred tank into an induction heating stirring device and use a speed of 300 rpm and an induction frequency of 300 KHz to raise the system from room temperature to 100 ℃ and keep it at that temperature for 0.5 h. After the reaction is completed, remove the carbon balls and wash, centrifuge and dry the resulting reactants to obtain rare earth fluoride material C. 3) Weigh polydimethylsiloxane prepolymer and curing agent at a mass ratio of 8:1, add to cyclohexane solution, wherein 4 g of the mixture of dimethylsiloxane prepolymer and curing agent is added to every 5 mL of cyclohexane solution, and ultrasonically disperse to obtain mixture D; add fluoride material C and PMMA particles with a particle size of 1 mm to ethanol solution at a mass ratio of 1:3 and disperse evenly to obtain mixture E, wherein 2 g of the mixture of C and PMMA particles is added to every 5 mL of ethanol solution; add mixture E dropwise to mixture D in a stirring process at a volume ratio of mixture E: mixture D of 2:1, and vacuum mix for 40 min to obtain mixture F; 4) The mixture F was transferred to the surface of a ceramic plate that had been cleaned and dried with water, ethanol, and acetone, respectively. The distance between the electric scraper and the ceramic plate was set to 50 μm, and the scraping speed was 1 m / min. A thin film was formed by coating, and then annealed at 50 °C for 10 min. After cooling, a flexible scintillator film NaLuF4:Tb was obtained. 3+ / Eu 3+ @PDMS. Finally, integrating this flexible scintillator film with a fiber optic spectrometer and terminal equipment yields a real-time intelligent radiation dose rate monitoring system. The monitoring process is as follows: After X-ray irradiation of the scintillator film, the light signal emitted by the film is collected using a fiber optic spectrometer, and then wirelessly transmitted to the terminal equipment via a WiFi module, enabling real-time display of the spectrum and dose rate.

[0022] Example 2 A method for preparing a scintillator thin film for a real-time X-ray dosimeter includes the following steps: 1) High-purity Eu(NO3)3·6H2O and Tb(NO3)3 6H2O, Lu(NO3)3 6H2O, NaF and NH4F were added to a high-speed shear disperser in a molar ratio of 3:10:70:200:400. Then, ethanol was added to the disperser at a ratio of 4 mL acetone:0.1 g NaF. The mixture was then mixed and dispersed at 15,000 rpm for 3 min. Finally, the mixture was microwave-dried at 700W for 2 min to obtain powder B. 2) Place powder B into an induction heating stirred tank and add three carbon balls with a diameter of 0.5 cm. Then place the induction heating stirred tank into an induction heating stirring device and use a speed of 400 rpm and an induction frequency of 400 KHz to raise the system from room temperature to 200 ℃ and keep it at that temperature for 1.5 h. After the reaction is completed, remove the carbon balls and wash, centrifuge and dry the resulting reactants to obtain rare earth fluoride material C. 3) Weigh polydimethylsiloxane prepolymer and curing agent at a mass ratio of 10:1, add to cyclohexane solution, wherein 6 g of the mixture of dimethylsiloxane prepolymer and curing agent is added to every 5 mL of cyclohexane solution, and ultrasonically disperse to obtain mixture D; add rare earth fluoride material C and PMMA particles with a particle size of 3 mm to ethanol solution at a mass ratio of 1:3 and disperse evenly to obtain mixture E, wherein 3 g of the mixture of rare earth fluoride material C and PMMA particles is added to every 5 mL of ethanol solution; add mixture E dropwise to mixture D in a stirring process at a volume ratio of mixture E: mixture D of 2:1, and vacuum mix for 70 min to obtain mixture F; 4) The mixture F was transferred to the surface of a ceramic plate that had been cleaned and dried with water, ethanol, and acetone, respectively. The distance between the electric scraper and the ceramic plate was set to 400 μm, and the scraping speed was 3 m / min. A thin film was formed by coating, and then annealed at 100 °C for 30 min. After cooling, a flexible scintillator film NaLuF4:Tb was obtained. 3+ / Eu 3+ @PDMS. Finally, integrating this flexible scintillator film with a fiber optic spectrometer and terminal equipment yields a real-time intelligent radiation dose rate monitoring system. The monitoring process is as follows: After X-ray irradiation of the scintillator film, the light signal emitted by the film is collected using a fiber optic spectrometer, and then wirelessly transmitted to the terminal equipment via a WiFi module, enabling real-time display of the spectrum and dose rate.

[0023] Example 3 1) High-purity Eu(NO3)3·6H2O and Tb(NO3)3 6H2O, Lu(NO3)3 6H2O, NaF and NH4F were added to a high-speed shear disperser in a molar ratio of 9:20:80:300:500. Then, ethanol was added to the disperser at a ratio of 6 mL acetone: 0.1 g NaF. The mixture was then mixed and dispersed at 15,000 rpm for 5 min. Finally, the mixture was microwave-dried at 700W for 3 min to obtain powder B. 2) Place powder B into an induction heating stirred tank and add three carbon balls with a diameter of 0.5 cm. Then place the induction heating stirred tank into an induction heating stirring device and use a rotation speed of 500 rpm and an induction frequency of 500 KHz to raise the system from room temperature to 300 ℃ and keep it at that temperature for 2.5 h. After the reaction is completed, remove the carbon balls and wash, centrifuge and dry the resulting reactants to obtain rare earth fluoride material C. 3) Weigh polydimethylsiloxane prepolymer and curing agent at a mass ratio of 13:1, add to cyclohexane solution, wherein 8 g of the mixture of dimethylsiloxane prepolymer and curing agent is added to every 5 mL of cyclohexane solution, and ultrasonically disperse to obtain mixture D; add rare earth fluoride material C and PMMA particles with a particle size of 5 mm to ethanol solution at a mass ratio of 1:3 and disperse evenly to obtain mixture E, wherein 4 g of the mixture of rare earth fluoride material C and PMMA particles is added to every 5 mL of ethanol solution; add mixture E dropwise to D while stirring at a volume ratio of mixture E: mixture D of 2:1, and vacuum mix for 90 min to obtain mixture F; 4) The mixture F was transferred to the surface of a ceramic plate that had been cleaned and dried with water, ethanol, and acetone, respectively. The distance between the electric scraper and the ceramic plate was set to 1000 μm, and the scraping speed was 5 m / min. A thin film was formed by coating, and then annealed at 150 °C for 50 min. After cooling, a flexible scintillator film NaLuF4:Tb was obtained. 3+ / Eu 3+ @PDMS. Finally, integrating this flexible scintillator film with a fiber optic spectrometer and terminal equipment yields a real-time intelligent radiation dose rate monitoring system. The monitoring process is as follows: After X-ray irradiation of the scintillator film, the light signal emitted by the film is collected using a fiber optic spectrometer, and then wirelessly transmitted to the terminal equipment via a WiFi module, enabling real-time display of the spectrum and dose rate.

[0024] Depend on Figures 1-3 The XRD patterns show that NaLuF4:Tb in Examples 1-3 3+ / Eu 3+ The X-ray diffraction peaks of the PDMS flexible scintillator film corresponded sharply to the standard card for NaLuF4, indicating high purity and crystallinity of these samples. Figure 4 The radiation spectra of NaLuF4:Tb in Examples 1-3 show that... 3+ / Eu 3+ @PDMS thermoluminescent film emits Eu 3+ and Tb 3+ The characteristic emission peaks of Example 2 were observed, and the radiative emission intensity of Example 2 was higher than that of Examples 1 and 3. Figure 5 The flexible emission patterns show that NaLuF4:Tb in Examples 1-3 3+ / Eu 3 The PDMS thermoluminescent film is flexible. Considering the excellent radiative emission properties of Example 2, the following tests focus on Example 2. Figure 6 As can be seen from the cyclic stress-strain diagram, in Example 2, NaLuF4:Tb 3+ / Eu 3+ @PDMS flexible scintillator films have excellent flexibility. Figure 7Example 2 at 0.11 mGy air ·s -1 Up to 37.98mGy air ·s -1 Within the radiation dose rate range, NaLuF4:Tb 3+ / Eu 3+ A comparison of dose rate response curves of powder and commercially available CsI:Tl, BGO, and LYSO scintillator materials, NaLuF4:Tb 3+ / Eu 3+ The responsivity of the powder is twice that of commercial CsI:Tl scintillator materials. Figure 8(a) shows the model scheme of the intelligent platform constructed in Example 2 for monitoring real-time radiation dose levels, and Figure 8(b) shows the application of the intelligent platform at 85.84 mGy. air ·s -1 The real-time dose rate stability results after 15 cycles of radiation dose rate testing show a relative error of 0.8%, indicating that the material has excellent stability.

[0025] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A method for producing a scintillator thin film for a real-time X-ray dosimeter, characterized by, Comprising the following steps: 1) Eu(NO3)3.6H2O, Tb(NO3)3 6H2O, Lu(NO3)3 6H2O, NaF and NH4F were subjected to high-speed shearing dispersion, solution A was added thereto and mixed and dispersed thoroughly to obtain a viscous mixture, which was then dried by microwave to obtain powder B; 2) Put powder B into an inductive heating stirring kettle, and put several carbon balls with preset diameters into the kettle, then put the kettle into an inductive heating stirring device, so that the whole system is gradually heated from room temperature to the target temperature and kept constant, after the reaction, take out the carbon balls, and then wash, centrifuge and dry the obtained reaction product to obtain rare earth fluoride material C; 3) Take polydimethylsiloxane prepolymer and curing agent with a mass ratio of (8-13):1, add them into a cyclohexane solution for ultrasonic dispersion to obtain mixture D; add rare earth fluoride material C and PMMA particles into an ethanol solution for uniform dispersion to obtain mixture E; add mixture E into mixture D with stirring at a volume ratio of 2:1, and vacuum mix for 40-90 min to obtain mixture F; 4) Transfer the mixture F to the surface of the ceramic plate which is cleaned with water, ethanol, acetone respectively and dried, coated to form a thin film, and then heated and annealed, and the flexible scintillator thin film NaLuF4:Tb is obtained after cooling 3+ / Eu 3+ @PDMS, for real-time X-ray dosimeter 2. The method of claim 1, wherein the method is characterized by: NH4F, NaF, Lu(NO3)3 6H2O, Tb(NO3)3 The molar ratio of NH4F, NaF, Lu(NO3)3·6H2O and Eu(NO3)3·6H2O is (1-9):(5-20):(50-80):(100-300):(300-500); solution A is ethanol or acetone; the ratio of solution A to NaF is 3-6 mL:0.1 g; the high-speed shearing dispersion rotation speed is 15000 rpm, and the time length is 1-5 min; the microwave drying power is 700 W, and the time length is 1-3 min.

3. The method of claim 1, wherein the method further comprises the steps of: In step 2), three carbon balls with a diameter of 0.5 cm are put in. ​ 4. The method of claim 1, wherein the method is characterized by: In step 2), the stirring condition is 300-500 rpm, and the inductive frequency is 300-500 KHz, and the temperature is raised from room temperature to 100-300 °C and kept for 0.5-2.5 h.

5. A method for preparing a scintillator thin film for a real-time X-ray dosimeter according to claim 1, characterized in that, In step 3), 4-8 g of the mixture of dimethylsiloxane prepolymer and curing agent is added into every 5 mL of cyclohexane solution.

6. The method of claim 1, wherein the method further comprises the steps of: In step 3), the PMMA particle size is 1-5 mm, and the mass ratio of rare earth fluoride material C to PMMA particles is 1:3, and 2-4 g of the mixture of rare earth fluoride material C and PMMA particles is added into every 5 mL of ethanol solution. ​ 7. The method of claim 1, wherein the method further comprises the steps of: In step 4), a thin film is formed by using an electric knife coating, the distance between the electric knife and the ceramic plate is 50-1000 μm, and the coating speed is 1-5 m / min. ​ The annealing temperature is controlled at 50-150 °C, and the annealing time is 10-50 min.

8. A scintillator film for real-time X-ray dosimeter, characterized by, The preparation method is prepared by any one of claims 1-7.

9. Use of a scintillator film for a real-time X-ray dosimeter in an intelligent monitoring system according to claim 8, characterized in that, The intelligent monitoring system is used for real-time X-ray dose measurement.

10. Use according to claim 9, characterized in that, The intelligent monitoring system comprises a fiber optic spectrometer, a scintillator film and a terminal device, when in use, after the scintillator film is irradiated by X-rays, the fiber optic spectrometer is used to collect the light signal emitted by the scintillator film, then the light signal is wirelessly transmitted to the terminal device through a WiFi module, and the real-time spectrum and dose rate are displayed.

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