阅读说明：本技术 一种闪烁材料及其制备方法及其应用 (Scintillation material and preparation method and application thereof ) 是由 卢健 郑发鲲 高娟 郭国聪 于 2021-09-01 设计创作，主要内容包括：本申请公开了一种闪烁材料及其制备方法及其应用。所述闪烁材料的化学式是C-(42)H-(42)X-(2)MnO-(2)P-(2)；其中,X选自Cl、Br中的一种；所述闪烁材料具有优异的X-射线闪烁性能以及灵敏的X-射线检测能力,其检测限远低于常规医疗诊断剂量标准5.50μGy-(air)/s。与目前商业化的闪烁材料相比,本申请所述闪烁材料的性能存在显著的优越性,且克服了其存在的合成过程中带来的重金属污染以及高耗能等缺点,在绿色合成高性能闪烁材料领域具有重要商业应用价值。(The application discloses a scintillation material, a preparation method and application thereof. The chemical formula of the scintillating material is C 42 H 42 X 2 MnO 2 P 2 (ii) a Wherein X is selected from one of Cl and Br; the scintillating material has excellent X-ray scintillating performance and sensitive X-ray detection capability, and the detection limit is far lower than the conventional medical diagnosis dosage standard of 5.50 mu Gy air And s. Compared with the current commercialized scintillating materials, the scintillating material has remarkable superiority in performance, overcomes the defects of heavy metal pollution, high energy consumption and the like brought by the synthesis process, and has important commercial application value in the field of green synthesis of high-performance scintillating materials.)

1. A scintillating material having a chemical formula according to formula I:

C₄₂H₄₂X₂MnO₂P₂formula I

Wherein, X is selected from one of Cl and Br.

2. The scintillating material of claim 1,

the scintillation material contains two asymmetric structural units;

the asymmetric structural unit comprises; 1 oxidized tris (o-methylphenyl) oxyphosphorus ligand, 1 half occupied Mn²⁺Ions and one X ion;

the micro-morphology of the scintillating material is a zero-dimensional structure.

3. Scintillating material according to claim 1, characterized in that in the scintillating material Mn is present²⁺The ions are in a tetrahedral space coordination configuration structure.

4. The scintillating material of claim 1,

the crystal structure of the scintillation material belongs to a monoclinic system and has a C2/C space group structure.

5. The scintillating material of claim 1,

among the unit cell parameters of the scintillation material, β＝100～120°；

preferably, in the formula I, X is Cl, and in the unit cell parameters of the scintillation material, β＝110.67～114.67°；

preferably, in the formula I, X is Br, and in the unit cell parameters of the scintillation material, β＝111.15～115.15°；

preferably, among the unit cell parameters of the scintillation material, α is 90 °, γ is 90 °, and Z is 4.

6. The scintillating material of claim 1, wherein under excitation of an ultraviolet band, the scintillating material has an emission peak of 512 ± 2nm in the range of 135-420 nm, and is green light emission;

preferably, the thermal decomposition temperature of the scintillation material is 280 ± 5 ℃.

7. The scintillating material of claim 1,

in the formula I, X is Cl, and the scintillation intensity of the scintillation material is 0.5-1 time of that of a bismuth germanate BGO scintillation crystal;

preferably, in the formula I, X is Br, and the scintillation intensity of the scintillation material is 4-5 times of BGO and 0.8-1.2 times of yttrium lutetium silicate LYSO scintillation crystal.

8. The method for producing a scintillating material of any one of claims 1 to 7,

(1) mixing tri (o-methylphenyl) phosphorus with a solvent and peroxide, and carrying out oxidation reaction to obtain a mixture;

(2) mixing MnX₂And (2) adding a metal salt into the mixture obtained in the step (1), and obtaining the scintillation material after a coordination reaction.

9. The method according to claim 8,

the solvent is at least one selected from ethanol, methanol, tetrahydrofuran and N-methyl pyrrolidone;

the peroxide is selected from at least one of hydrogen peroxide, benzoyl peroxide, potassium peroxymonosulfate, potassium persulfate, ammonium peroxymonosulfate and ammonium persulfate;

preferably, the tris (o-methylphenyl) phosphorus is reacted with a peroxide, MnX₂The dosage ratio of the metal salt is as follows: 1-5 mmol: 2-10 mmol: 1-5 mmol;

preferably, in the step (1), the reaction temperature of the oxidation reaction is 70-100 ℃; the reaction time is 12-24 hours;

in the step (2), the reaction temperature of the coordination reaction is 80-100 ℃; the reaction time is 12-24 hours.

10. Use of a scintillation material for high energy particle detection and/or imaging, wherein the scintillation material comprises a scintillation material according to any of claims 1 to 7 and/or a scintillation material prepared according to any of claims 8 to 9;

the high energy particles comprise X-rays;

preferably, the scintillating material is C₄₂H₄₂Cl₂MnO₂P₂The detection limit of the scintillating material is 3.90 mu Gy_air/s；

Preferably, the scintillating material is C₄₂H₄₂Br₂MnO₂P₂The detection limit of the scintillating material is 0.82 mu Gy_air/s。

Technical Field

The application relates to a scintillation material, a preparation method and application thereof, belonging to the field of scintillation materials.

Background

The scintillation material is characterized in that the kinetic energy of high-energy particles can be converted into energy under the impact of the high-energy particlesLight energy and glittering material. The current commercialized scintillating material mainly comprises bismuth germanate Bi₄Ge₃O₁₂(BGO), lead tungstate PbWO₄(PWO), cadmium tungstate CdWO₄(CWO), yttrium lutetium silicate Lu_1.8Y_0.2SiO₅Ce (LYSO), etc. These scintillating materials are often fired at a high temperature of over 1000 ℃, the industrial energy consumption is extremely high, heavy metal pollution and other problems in the production environment are easily caused due to the heavy metal and other elements, and in the high-temperature single crystal growth, the existence of micro scattering particles, the deposition of activator ions and the like are easy to bring about great differences in performance.

Meanwhile, with the development of technology and the improvement of environmental requirements, a green scintillating material with more excellent performance is required, so that the characteristics of no heavy metal, environmental friendliness, easiness in processing and the like are required on the premise of improving the scintillating performance, and the method becomes an important research direction of a novel scintillating material.

Disclosure of Invention

According to an aspect of the present application, there is provided a scintillating material, compound C in the scintillating material₄₂H₄₂Cl₂MnO₂P₂The scintillation intensity of the compound is about 0.87 times of that of bismuth germanate BGO scintillation crystal, and the compound C₄₂H₄₂Br₂MnO₂P₂The flicker intensity of (a) is about 4.27 times that of BGO.

According to an aspect of the present application, there is provided a scintillating material having a chemical formula as shown in formula I:

C₄₂H₄₂X₂MnO₂P₂formula I

Wherein, X is selected from one of Cl and Br.

The scintillation material can be a massive large single crystal or crystal powder.

The scintillating material does not contain heavy metals.

Optionally, the scintillating material contains two asymmetric structural units;

the asymmetric structural unit comprises 1 oxidized tri (o-methylphenyl) oxyphosphorus ligand and 1 half-occupied Mn²⁺Ions and one X ion; c₂₁H₂₁P is aromatic ring organic phosphine compound.

The micro-morphology of the scintillating material is a zero-dimensional structure.

Optionally, in the scintillation material, Mn is +2 valent metal ion, and is a tetrahedral space coordination configuration structure;

the structure of the spatial coordination configuration of the tetrahedron is shown in FIG. 8, and in the coordination, two xs are both Cl or both Br;

when X ═ Cl, the Mn-Cl bond length isMn-O bond length ofBy taking Mn as a center, the key angle of Cl1A-Mn1-Cl1 is 111.61(4) °, the key angle of O1A-Mn1-Cl1A is 113.29(5) °, the key angle of O1-Mn1-Cl1A is 107.64.61(5) °, the key angle of O1-Mn1-Cl1 is 113.29(5) °, and the key angle of O1A-Mn1-ClA is 107.17(9) °, which are all within a normal numerical range, wherein A is a symmetric operation code 3/2-x, + y, 1-z.

When X is Br, the Mn-Br bond length isMn-O bond length ofBy taking Mn as a center, a Br1A-Mn1-Br1 bond angle is 112.82(3) °, an O1A-Mn1-Br1 bond angle is 106.07(6) °, an O1A-Mn1-Br1A bond angle is 113.71(6) °, an O1-Mn1-Br1 bond angle is 113.71(6) °, and an O1A-Mn1-O1 bond angle is 104.31(12) °, which are all within a normal numerical range, wherein A is a symmetric operation code 1-x, + y, 1/2-z.

Optionally, the crystal structure of the scintillation material belongs to a monoclinic system, having a C2/C space group structure;

optionally, in the unit cell parameters of the scintillation material, β＝100～120°。

optionally, in the formula I, X is Cl, and in the unit cell parameters of the scintillation material, β＝ 110.67～114.67°。

optionally, in the formula I, X is Br, and in the unit cell parameters of the scintillation material, β＝ 111.15～115.15°。

optionally, the unit cell parameters of the scintillation material include α ═ 90 °, γ ═ 90 °, and Z ═ 4.

Optionally, under the excitation of ultraviolet light within the range of 135-420 nm, the emission peak of the scintillation material is 512 +/-2 nm, and the scintillation material emits green light.

Optionally, the scintillating material has good thermal stability with a thermal decomposition temperature of 280 ± 5 ℃.

Optionally, in the formula I, X is Cl, and the scintillation material is C₄₂H₄₂Cl₂MnO₂P₂The scintillation intensity of the scintillation material is 0.5-1 time of that of the bismuth germanate BGO scintillation crystal;

optionally, in the formula I, X is Br, and the scintillation material is C₄₂H₄₂Br₂MnO₂P₂The scintillation intensity is 4-5 times of BGO and 0.8-1.2 times of yttrium lutetium silicate LYSO scintillation crystal.

According to another aspect of the application, a method for preparing the scintillating material is provided, the method is simple in steps, and the obtained product is high in purity and yield and suitable for large-scale industrial production.

Optionally, the method comprises the steps of:

(1) mixing tri (o-methylphenyl) phosphorus with a solvent and peroxide, and carrying out oxidation reaction to obtain a mixture;

(2) mixing MnX₂And (2) adding a metal salt into the mixture obtained in the step (1) which is cooled to room temperature, and obtaining the scintillation material after a coordination reaction.

The scintillation material can be cooled and filtered after coordination reaction, and the filtrate is placed in an ether atmosphere for about one week to separate out crystals; the crystals can also be obtained directly after the coordination reaction by cooling.

The tris (o-methylphenyl) phosphorus (C)₂₁H₂₁P) is an aromatic ring organic phosphine compound;

optionally, the solvent is selected from at least one of ethanol, methanol, tetrahydrofuran, N-methyl pyrrolidone and other protonic solvents;

optionally, the peroxide is selected from at least one of hydrogen peroxide, benzoyl peroxide, potassium peroxymonosulfate, potassium persulfate, ammonium peroxymonosulfate, ammonium persulfate and the like;

alternatively, the tris (o-methylphenyl) phosphorus is reacted with a peroxide, MnX₂The dosage ratio of the metal salt is (1-5) mmol, (2-10) mmol: (1-5) mmol;

preferably, the tris (o-methylphenyl) phosphorus is reacted with a peroxide, MnX₂The dosage ratio of the metal salt is as follows: (1-2) mmol: (2-4) mmol: (1-2) mmol;

the volume of the solvent is not less than 10 mL.

Optionally, in the step (1), the reaction temperature of the oxidation reaction is 70-100 ℃; the reaction time is 12-24 hours;

in the step (2), the reaction temperature of the coordination reaction is 80-100 ℃; the reaction time is 12-24 hours.

The skilled in the art can select appropriate reaction time and reaction temperature according to actual needs, so as to ensure that the reaction is fully performed.

Preferably, the lower limit of the reaction temperature of the oxidation reaction is independently selected from 70 ℃, 75 ℃, 80 ℃, and the upper limit of the reaction temperature of the oxidation reaction is independently selected from 90 ℃, 95 ℃, 100 ℃.

Preferably, the lower limit of the reaction time of the oxidation reaction is independently selected from 12 hours, 14 hours, 18 hours, and the upper limit of the reaction time of the oxidation reaction is independently selected from 20 hours, 22 hours, 24 hours.

Preferably, the lower limit of the reaction temperature of the coordination reaction is independently selected from 80 ℃, 85 ℃, 90 ℃, and the upper limit of the reaction temperature of the coordination reaction is independently selected from 95 ℃, 100 ℃.

Preferably, the lower limit of the reaction time of the coordination reaction is independently selected from 12 hours, 14 hours, 16 hours, and the upper limit of the reaction time of the coordination reaction is independently selected from 18 hours, 22 hours, 24 hours.

According to still another aspect of the present application, there is provided a use of a scintillating material in high-energy particle detection and/or imaging, wherein the scintillating material comprises the scintillating material and/or the scintillating material prepared by the above method;

the high energy particles comprise X-rays;

optionally, the scintillating material has sensitive X-ray detection capability, and the scintillating material is C₄₂H₄₂Cl₂MnO₂P₂The detection limit of the scintillating material is 3.90 mu Gy_air/s；

Preferably, the scintillating material is C₄₂H₄₂Br₂MnO₂P₂The detection limit of the scintillating material is 0.82 mu Gy_air/s；

Are all lower than the conventional medical diagnosis dose standard by 5.50 mu Gy_air/s。

According to another aspect of the application, there is provided a use of the X-ray detection and imaging display material in X-ray dose monitoring.

The beneficial effects that this application can produce include:

(1) the present application provides a scintillating material. The energetic material has good thermal stability and excellent X-ray scintillation performance, and the synthesis process is green and environment-friendly. The experimental determination shows that the thermal stability upper limit of the scintillating material is highUp to 280 ℃ of compound C₄₂H₄₂Cl₂MnO₂P₂The scintillation intensity of the compound is about 0.87 times of that of bismuth germanate BGO scintillation crystal, and the compound C₄₂H₄₂Br₂MnO₂P₂The scintillation intensity of the scintillation material is about 4.27 times of BGO, the defects of heavy metal pollution and high industrial energy consumption in the traditional commercial scintillator are overcome, and the scintillation material has important commercial application value in the field of scintillation materials.

(2) The application provides an X-ray detection and imaging display material. Compound C₄₂H₄₂Cl₂MnO₂P₂And compound C₄₂H₄₂Br₂MnO₂P₂Has sensitive X-ray detection capability and detection limit of 3.90 mu Gy respectively_air(s) and 0.82. mu. Gy_air(s) 5.50 mu Gy lower than the conventional medical diagnostic dose standard_airAnd s. The high-performance X-ray detection capability can further improve the spatial resolution of the imaging display device, is important for high-quality imaging, and has important commercial application value in the fields of high-energy particle detection and imaging display materials.

(3) The application provides a preparation method of the scintillating material. The method has simple steps, and the obtained energetic material has high purity, good crystallinity and high yield, and is suitable for large-scale industrial production.

Drawings

FIG. 1 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#Wherein (a) is a sample 1-Cl^#A schematic of the crystal structure of (a); (b) FIG. 2-Br of sample^#Schematic of the crystal structure of (a).

FIG. 2 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#Fitting the single crystal data to obtain an XRD diffraction theory pattern and an XRD diffraction pattern measured by the experiment, wherein the pattern (a) is sample 1-Cl^#Fitting the single crystal data to obtain an XRD diffraction theoretical pattern and an XRD diffraction pattern measured by an experiment; (b) FIG. 2-Br of sample^#XRD diffraction theory pattern obtained by fitting single crystal data and experimental measurement thereofXRD diffractogram of.

FIG. 3 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#The thermal stability test pattern of (a), wherein the pattern of (a) is sample 1-Cl^#A thermal stability test profile; (b) FIG. 2-Br of sample^#Heat stability experimental profile.

FIG. 4 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#Including an optimal excitation wavelength and an optimal emission wavelength, wherein (a) is sample 1-Cl^#Photoluminescence experimental spectra; (b) FIG. 2-Br of sample^#Photoluminescence experimental spectra.

FIG. 5 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#The X-ray scintillation luminescence experiment map of (a), wherein the map of (a) is sample 1-Cl^#An X-ray scintillation luminescence experimental map; (b) FIG. 2-Br of sample^#X-ray scintillation luminescence experimental atlas.

FIG. 6 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#The scintillation property experiment of (2) compares the maps.

FIG. 7 is sample 1-Cl obtained in example 1^#And sample 2-Br obtained in example 2^#Experimental profile of X-ray dose detection.

FIG. 8 shows Mn²⁺Ion tetrahedral space coordination configuration structure.

Detailed Description

The present application will be described in detail with reference to examples, but the present application is not limited to these examples.

Unless otherwise specified, the starting materials in the examples of the present application were all purchased commercially, wherein tris (o-methylphenyl) phosphorus, manganese chloride, manganese bromide dihydrate were purchased from the Shanghai Michelle chemical technology Co., Ltd; protic solvents such as ethanol and methanol, and peroxides, including hydrogen peroxide, are commercially available from the national pharmaceuticals.

Example 11-Cl^#Preparation of samples

Mixing 3mmol of tri (o-methylphenyl) phosphorus in ethanol and hydrogen peroxide solution (1)8mL, V: V ═ 16:2) was left to react at a reaction temperature of 100 ℃ for 12 hours, then cooled to room temperature, and 3mmol of a metal salt MnCl was added₂Continuing the reaction at the reaction temperature of 100 ℃ for 12 hours; cooling, filtering, placing the filtrate in ether atmosphere for about one week to separate out crystal, the yield is 87% (based on MnCl)₂) The crystal has the chemical formula of C₄₂H₄₂Cl₂MnO₂P₂。

Example 22 Br^#Preparation of samples

3mmol of tris (o-methylphenyl) phosphorus mixed solution of ethanol and hydrogen peroxide (18mL, V: V ═ 16:2) is placed at the reaction temperature of 100 ℃ for reaction for 12 hours, then cooled to room temperature, and 3mmol of metal salt MnBr is added₂·2H₂Continuously reacting O at the reaction temperature of 100 ℃ for 12 hours; cooling to obtain block monocrystal suitable for X-ray single crystal diffraction experiment, filtering, placing filtrate in diethyl ether atmosphere for about one week, and continuously precipitating crystal with yield of 91% (based on MnBr)₂·2H₂O) with a crystal of the formula C₄₂H₄₂Br₂MnO₂P₂。

Test example 1 structural characterization of the sample

Sample 1-Cl^#And 2-Br^#The X-ray single crystal diffraction of (A) was carried out on a Mercury CCD type single crystal diffractometer, Mo target, K.alpha.radiation sourceThe test temperature is 293K. And by Olex²1.2 pair for structure analysis. The test results are shown in FIG. 1(a), and the asymmetric unit contains 1 oxidized tri (o-methylphenyl) oxyphosphorus ligand and 1 semi-occupied Mn²⁺Ions and a Cl^-Ions; by a symmetrical operation, it can be seen that Mn is a distorted tetrahedral geometry with four coordination, where the Mn-Cl bond length isMn-O bond length ofBy taking Mn as a center, the key angle of Cl1A-Mn1-Cl1 is 111.61(4) °, the key angle of O1A-Mn1-Cl1A is 113.29(5) °, the key angle of O1-Mn1-Cl1A is 107.64.61(5) °, the key angle of O1-Mn1-Cl1 is 113.29(5) °, and the key angle of O1A-Mn1-ClA is 107.17(9) °, which are all within a normal numerical range, wherein A is a symmetric operation code 3/2-x, + y, 1-z.

Sample 1-Cl^#And 2-Br^#Phase analysis (XRD) of the ground X-ray powder diffraction on a MiniFlex 600X-ray diffractometer from Rigaku, Cu target, Kalpha radiation sourceThe results are shown in FIG. 1(b), which contains 1 oxidized tris (o-methylphenyl) oxyphosphorus ligand and 1 semi-occupied Mn in the asymmetric unit²⁺Ions and one Br^-Ions; by means of a symmetrical operation, it can be seen that Mn is a tetrahedral geometry with a four-coordinate distortion, in which the Mn-Br bond length isMn-O bond length ofBy taking Mn as a center, a Br1A-Mn1-Br1 bond angle is 112.82(3) °, an O1A-Mn1-Br1 bond angle is 106.07(6) °, an O1A-Mn1-Br1A bond angle is 113.71(6) °, an O1-Mn1-Br1 bond angle is 113.71(6) °, and an O1A-Mn1-O1 bond angle is 104.31(12) °, which are all within a normal numerical range, wherein A is a symmetric operation code 1-x, + y, 1/2-z.

The comparison of the XRD diffraction theory pattern obtained by fitting X-ray single crystal diffraction with the XRD diffraction pattern obtained by analyzing the X-ray powder diffraction phase is shown in figure 2, and it can be seen that the XRD diffraction pattern obtained by fitting single crystal data is highly consistent with the XRD diffraction pattern obtained by experiment, and the obtained sample is proved to be a sample with high purity and high crystallinity.

The X-ray powder diffraction and X-ray single crystal diffraction results show that:

sample 1-Cl^#(chemical formula C)₄₂H₄₂Cl₂MnO₂P₂) And 2-Br^#(chemical formula C)₄₂H₄₂Br ₂MnO₂P₂) All belong to the C2/C space group of monoclinic system.

For sample 1-Cl^#Cell parameter of α＝90°，β＝112.674(5)°，γ＝90°，Z＝4；

For sample 2-Br^#Cell parameter of α＝90°，β＝113.149(5)°，γ＝90°，Z＝4。

Test example 2 thermal stability test experiment

Sample 1-Cl^#And 2-Br^#May be at TGA&DSC METTLER TOLEDO thermogravimetric analyzer, measured in a nitrogen atmosphere. As shown in FIG. 3, sample 1-Cl^#And 2-Br^#Has good thermal stability and still maintains the structural integrity at 280 ℃.

Test example 3X-ray scintillation performance test experiment

For sample 1-Cl^#And 2-Br^#An X-ray scintillation performance test is carried out, and the specific steps are as follows:

an X-ray scintillation performance comprehensive test platform is set up by self, BGO and LYSO purchased from scintillating photoelectric technology Limited in mansion are used as reference samples before samples are tested, and the samples are screened for photoluminescence performance test under the excitation of ultraviolet light before the X-ray scintillation performance test, the selected instrument is Edinburgh FLS920 for photoluminescence performance test, wherein an excitation light source is an Xe lamp, the ultraviolet light with a specific excitation wave band can be selected through a filter system, an excitation slit is 1mm, and a receiving slit is 1 mm.

The experimental spectrum of photoluminescence is shown in fig. 4. Sample 1-Cl excited at an optimum wavelength of 350nm^#And 2-Br^#The optimal photoluminescence peak is 512 +/-2 nm, and the green light emission is realized.

The experimental spectrum of the X-ray scintillation property is shown in FIG. 5. Sample 1-Cl^#And 2-Br^#The scintillation luminescence of (A) is also 512 +/-2 nm. And when the tube voltage of the X-ray tube is fixed and the tube current of the X-ray tube is changed, the sample 1-Cl^#And 2-Br^#All show scintillation signals at 512 +/-2 nm; sample 1-Cl as a function of X-ray dose^#And 2-Br^#The flicker intensity of (c) varies linearly with it. When the tube voltage is fixed at 50kV, the tube current is gradually reduced from 100 muA to 50 muA, and the X-ray scintillation performance is reduced in turn.

The comparative experimental spectrum of scintillation performance is shown in fig. 6. When the tube voltage of the X-ray light pipe is 50kV, the tube current of the X-ray light pipe is 100 muA, the distance between the sample and the X-ray light pipe is 5cm, and the weight of the test sample is 100 mg. As can be seen, the sample 1-Cl was experimentally determined under the same test conditions^#The scintillation intensity of the sample is about 0.87 times that of bismuth germanate BGO scintillation crystal, and the sample is 2-Br^#The scintillation intensity of (A) is about 4.27 times that of BGO and 0.92 times that of yttrium lutetium silicate LYSO. 1-Cl compared with the scintillation material commercialized at present^#≈BGO<2-Br^#About LYSO, the performance of the scintillation material is equivalent to that of a commercial scintillation material, but the synthesis is cheaper, and the condition of great advantage is provided.

The experimental examination of the X-ray dose is shown in fig. 7, in which the X-ray dose can be achieved by fixing the tube voltage of the X-ray light tube, changing the tube current of the X-ray light tube, and the dose detected by the reagent is corrected by the RAMION dosimeter. The linear slope of the curve represents the detection sensitivity of the scintillating material to high-energy X-ray, | k (2-Br) & gtLiao>I k (1-Cl) i, 2-Br in the scintillation material sample^#The detection sensitivity to high-energy X-ray is better than that of the scintillating material sample 1-Cl^#. According to the International Union of pure and applied chemistry, the X-ray dose detection limit is 3 sigma, which is the standard deviation of instrument noise and the X-ray dose detection curve slopeThe standard deviation of the noise of the apparatus from the ratio of | k | was 0.97, and therefore, 1-Cl was obtained as a sample^#And sample 2-Br^#The detection limits are respectively 3.90 mu Gy_air(s) and 0.82. mu. Gy_air(s) 5.50 mu Gy lower than the conventional medical diagnostic dose standard_airAnd s. This indicates that sample 1-Cl^#And sample 2-Br^#Has sensitive X-ray detection capability.

Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.