High-performance wide-band scintillator material

A scintillator material and wide-band technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of reducing the immune function of the body, destroying white blood cells, and low integral intensity

Inactive Publication Date: 2022-03-11
CHINA JILIANG UNIV
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Problems solved by technology

[0002] X-ray imaging technology based on traditional block scintillators usually requires high X-ray radiation dose to obtain high-quality images, for example, the effective radiation dose of a CT-chest and coronary angiography examination is about 7 and 12 mSv respectively , which may destroy the white blood cells in the human blood, reduce the immune function of the body, and lead to dangerous diseases, especially not suitable for the detection of diseases in pregnant women and infants
Commonly used scintillators are measured in Tb 3+ Ions are luminescent centers, their emission lines are narrow-band, and the overall integrated intensity is low. In order to achieve high-quality imaging, it is usually necessary to increase the radiation dose

Method used

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Embodiment

[0015] A high-performance broadband scintillator material, the chemical formula is LiLuF 4 :Gd / Ca / Mn@LiYF 4 .

[0016] LiF 4 :Gd / Ca / Mn@LiYF 4 The preparation method comprises the following steps in turn: (1) 1.5 mmoles lithium trifluoroacetate, 0.6 mmoles lutetium trifluoroacetate, 0.15 mmoles gadolinium trifluoroacetate, 0.15 mmoles manganese acetate, 0.1 mmoles trifluoroacetate Calcium acetate, 15 mmol oleic acid, 15 mmol oleylamine, and 20 mmol octadecene were added to the three-necked flask, and under the protection of nitrogen, at 120 o C for 1 hour, then raised to 310 o C, and kept at this temperature for 60 minutes, then naturally cooled to room temperature, washed with a mixture of ethanol and cyclohexane to obtain LiLuF 4 : Gd / Ca / Mn nanocrystalline core, and then save the nanocrystalline core in 2 ml cyclohexane for later use; (2) mix 1.5 mmol lithium trifluoroacetate, 1 mmol yttrium trifluoroacetate, 20 mmol oleic acid , 35 mmoles of octadecene were added to th...

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Abstract

The invention belongs to the field of inorganic luminescent materials. A high-performance wide-band scintillator material has a chemical formula of LiLuF4: Gd / Ca / Mn (at) LiYF4, and a preparation method of the high-performance wide-band scintillator material sequentially comprises the following steps: adding lithium trifluoroacetate, lutetium trifluoroacetate, gadolinium trifluoroacetate, manganese acetate, calcium trifluoroacetate, oleic acid, oleylamine and octadecene into a three-necked bottle, reacting at a high temperature, naturally cooling to room temperature, washing and centrifuging to obtain a LiLuF4: Gd / Ca / Mn nanocrystalline core; and then preparing the LiLuF4: Gd / Ca / Mn coated LiYF4 core-shell nanocrystal by a layer-by-layer epitaxial growth method. The method has the advantages that the preparation method is simple, the cost is low, the yield is high, the product has the characteristics that X-ray excited Mn < 2 + > ion wide-band luminescence is shown, the light yield is high, and the resolution ratio of X-ray imaging can be greatly improved.

Description

technical field [0001] The invention belongs to the field of scintillation crystals, and relates to a novel scintillator material based on transition metal-doped fluoride nanocrystals. Background technique [0002] X-ray imaging technology based on traditional block scintillators usually requires high X-ray radiation dose to obtain high-quality images, for example, the effective radiation dose of a CT-chest and coronary angiography examination is about 7 and 12 mSv respectively , which may destroy the white blood cells in the human blood, reduce the immune function of the body, and lead to dangerous diseases, especially not suitable for the detection of diseases in pregnant women and infants. Commonly used scintillators are measured in Tb 3+ Ions are luminescence centers, their emission lines are narrow-band, and the overall integrated intensity is low. In order to achieve high-quality imaging, it is usually necessary to increase the radiation dose. The development of new ...

Claims

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Application Information

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IPC IPC(8): C09K11/85C09K11/02
CPCC09K11/7773C09K11/02
Inventor 雷磊徐玮鑫华有杰邓德刚徐时清
Owner CHINA JILIANG UNIV
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