Study on Temperature Dependence of Light Output of GAGG∶Ce Scintillation Crystal
The light output performance of scintillation crystals can be affected by the temperature of the crystal.Gd3(Ga,Al)5O12∶Ce(GAGG∶Ce)scintillation crystals are widely used in medical imaging,radiation monitoring,high-energy physics,and other fields.To study the temperature dependence of the light output of GAGG∶Ce crystals,this paper designed an experiment with crystal temperature as a single variable.The full energy peak position of seven energy levels of γ-rays ranging from 121.8 keV to 1 112.1 keV was measured within the temperature range of-30 ℃ to 60 ℃.The curve of the light output of GAGG∶Ce crystals changing with temperature was obtained,and the linear relationship between the light output of the crystal and temperature was analyzed.A linear function was used to fit the energy linearity of the corresponding channel positions for seven energies ranging from 121.8 keV to 1 112.1 keV at different temperatures.The determination coefficient R2 of the linear fit was greater than 0.999 9,demonstrating that GAGG∶Ce crystals have good energy linearity.
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