Preparation of solid thermoluminescent dosemeter material

A thermoluminescent dose and solid technology, which is applied in the field of preparation of solid thermoluminescent dosimeter materials, can solve the problems of reduced thermoluminescent sensitivity, complex peak shape of thermoluminescent light, unfavorable dose signal testing, etc., and achieve production cost Inexpensive, stable chemical properties of the product, easy to test the effect of the signal

Inactive Publication Date: 2009-05-20
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, LiF: Mg, Cu, P also has some disadvantages: 1. Its thermoluminescence peak shape is complex and consists of multiple luminescence peaks, which is not conducive to the test of dose signal; 2. High temperature luminescence leads to high residual signal; 3. When the maximum heating temperature exceeds 270°C, its thermoluminescence sensitivity will decrease (A.J.J.Bos, High sensitivity thermoluminescence dosimetry, Nucl.Instrum.Meth.Phys.Res.B, 2001, 184, 3-28)

Method used

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  • Preparation of solid thermoluminescent dosemeter material
  • Preparation of solid thermoluminescent dosemeter material

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Embodiment 1

[0014] Raw material is SrHPO 4 (analytical pure), NH 4 h 2 P0 4 (analytical pure), Eu 2 o 3 (99.99%), Pr 6 o 11 (99.99%) The molar ratio between them is 1:0.05:0.02:0.02. Grind the raw materials evenly in a mortar, dry them, put them into a corundum crucible, and then put them into a large corundum crucible, filled with carbon Rods were put into a high-temperature furnace at 900°C for 3 hours, cooled to room temperature naturally, taken out and ground to obtain samples. The obtained product is a white powder, and its thermoluminescence peak is as figure 1 As shown, its luminescence curve is a single peak, and the peak temperature is at 439.5K.

Embodiment 2

[0016] Raw material is SrHPO 4 (analytical pure), NH 4 h 2 PO 4 (analytical pure), Eu 2 o 3 (99.99%), Pr 6 0 11 (99.99%) The molar ratio between them is 1:0.05:0.001:0.08. Grind the raw materials evenly in a mortar, dry them, put them into a corundum crucible, and then put them into a large corundum crucible, filled with carbon Rods were put into a high-temperature furnace for 3 hours at 1000°C and baked for 3 hours, cooled to room temperature naturally, taken out and ground to obtain samples. The obtained product is a white powder, and its thermoluminescence peak is as figure 1 As shown, its luminescence curve is a single peak, and the peak temperature is at 439.5K.

Embodiment 3

[0018] The raw materials are SrHPO4 (analytical pure), NH 4 h 2 PO 4 (analytical pure), Eu 2 o 3 (99.99%), Pr 6 o 11 (99.99%) The molar ratio between them is 1: 0.05: 0.005: 0.001. Grind the raw materials evenly in a mortar, dry them, place them in a corundum crucible, and then put them into a large corundum crucible, filled with carbon Rods were put into a high-temperature furnace at 1200°C for 5 hours, cooled to room temperature naturally, taken out and ground to obtain samples. The obtained product is a white powder, and its thermoluminescence peak is as figure 1 As shown, its luminescence curve is a single peak, and the peak temperature is at 439.5K.

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Abstract

The invention provides a solid thermoluminescence dosimeter, relating to the following chemical formula: Sr2P2O7:xEu<2+>, yPr<3+>. The raw materials strontium hydrogen phosphate, ammonium dihydrogen phosphate, europium oxide and praseodymium oxide are weighed according to dosage ratio, grinded, mixed uniformed and filled in a roasting vessel; the roasting vessel is then placed in a high-temperature furnace under the sintering atmosphere of CO gas, H2 gas or the mixed gas of N2 and H2 and sintered at the temperature of 900-1400 DEG C for 3-6 hours, thus obtaining target material. After being radiated by Gama-ray, the thermoluminescence curve is single peak with the peak temperature of 439.5K; the thermoluminescence sensitivity is 4.6 times of dosimeter (LiF:Mg, Cu, P) which is widely used at present and has the highest sensitivity; furthermore, the solid thermoluminescence dosimeter material has good linearity at the dosage response of the thermoluminescence at 100-1000mGy and is a good thermoluminescence dosimeter material.

Description

technical field [0001] The invention relates to a preparation method of a solid thermoluminescent dosimeter material technical background [0002] Solid-state thermoluminescent dosimeters have been widely used in many fields such as radiation protection, radiation therapy, environmental detection, geological age measurement, archaeology, and aerospace. The low decay characteristics of LiF at room temperature together with its corrosion resistance, wear resistance and poor water solubility make it one of the most popular thermoluminescent materials for personal and environmental monitoring. Cameron and colleagues developed a material mainly activated by magnesium and titanium, LiF:Mg,Ti called TLD-100, which is widely used and in many ways as a standard thermoluminescence emitter (A.G.Kozakiewicz, A.T.Davidson, D.J. Wilkinson, The effect of pre-irradiation annealing on TLglow curves of LiF(Mg), Nucl. Instrum. Meth. Phys. Res. B, 2000, 166, 577-580). In addition to magnesium...

Claims

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Application Information

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IPC IPC(8): C09K11/81G01T1/11
Inventor 李成宇姜丽宏庞然苏锵
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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