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In this paper, NaCl: Cu circular dose tablets with a size of 5×1.8mm were prepared by sintering with pure NaCl and CuCl powder as raw materials. They were placed in a four element shell and sealed with plastic film to overcome the moisture absorption of the material. Their photoluminescence characteristics were studied by using Inlight 200 automatic photoluminescence measurement system. The results show that the X-ray characteristic peaks of NaCl: Cu sintered at 650 and 400 ℃ ℃ appear at 27 °, 32 °, 45 °, 56 °, 66 °, 75 ° and 84 ° respectively. Compared with the XRD standard card of pure NaCl crystal (pdf-#88-2300), the sample sintered at 650 is more consis ℃ tent with the standard card. In the scanning electron microscope image, it can be seen that the whole is welded and closely connected, and the characteristic grains in the sintering process have good welding effect; After Cu+ ion doping, the lattice structure of NaCl is slightly deformed. After high-temperature sintering, the mass transfer of Cu+ ion occurs at the atomic level in NaCl, and the particles are combined into a coherent solid structure. For X/γ-rays, the photoluminescence response of NaCl: Cu dose sheet to low-energy rays is higher than that of the same kind of rays with high energy. When using NaCl: Cu dose sheet to calculate the cumulative photoluminescence dose, it is necessary to consider the ray category and ray energy of the radiation source at the radiation site. The photoluminescence curve of NaCl: Cu dose sheet has typical exponential attenuation characteristics. The deflection angle of dose sheet has the greatest influence on the measured value, which is 13.5%. With the increase of deflection angle of dose sheet, the area irradiated by γ-ray decreases, and the response of internal lattices to γ-ray decreases slightly. The uniformity of NaCl: Cu raw material particle size has a great impact on the distribution consistency of photoluminescence response of dose tablets. The decrease of sample particle size during tablet pressing can improve the contact surface area between NaCl and CuCl. The increase of contact surface area can improve the diffusion and transfer efficiency of Cu+ ions, increase the number of dose traps in the crystal, and make the overall count higher. When the particle size is more uniform, The Cu+ ion transfer efficiency and quantity of different dose tablets are close, the difference in the number of dose traps is reduced, and the photoluminescence sensitivity is closer. The coefficient of variation of the repeatability test experiment is C.V. = 2.28%. The consistency of the repeated measurement data is good. The lattice structure and lattice defects of the material are not changed in the process of photoluminescence measurement and photoannealing. In the dose range of 1-1000mgy, with the increase of irradiation dose, the photoluminescence response of NaCl: Cu and NaCl dose tablets gradually increased and showed a good linear relationship. The photoluminescence response of NaCl: Cu was 2 to 4 times higher than that of NaCl dose tablets. NaCl: Cu dose tablets prepared by sintering method can be used as dosimeters for personal or environmental dose monitoring.

Photoluminescence characteristics of NaCl: Cu sintered dose tablets under X/γ irradiation