ABSTRACT
Objective To improve the quality of personal dose equivalent measurement by exploring optimal annealing temperature conditions.Methods Totally 60 pieces of thermoluminescent detectors were randomly and equally divided into 6 groups.The 6 groups underwent 10-min annealing under 200,220,230,240,250 or 260 ℃ respectively,and then were cooled with the same conditions and went through measurement after irradiation by the calibrated radiation source.The above operation of annealing,cooling and measurement were repeated for 10 times,and the 6 groups were compared on dispersity,sensitivity and glow curve.Results Single test proved that under 240 ℃ the dispersity,sensitivity and glow curve gained optimal results comprehensively,while repeated tests showed that the dispersity had the optimal value under 250 ℃ and the sensitivity decreased significantly as the times of annealing rose.Conclusion Annealing conditions have to be selected according to the requirements of the thermoluminescent detector.
ABSTRACT
Objective To improve the quality of personal dose equivalent measurement by exploring optimal annealing temperature conditions.Methods Totally 60 pieces of thermoluminescent detectors were randomly and equally divided into 6 groups.The 6 groups underwent 10-min annealing under 200,220,230,240,250 or 260 ℃ respectively,and then were cooled with the same conditions and went through measurement after irradiation by the calibrated radiation source.The above operation of annealing,cooling and measurement were repeated for 10 times,and the 6 groups were compared on dispersity,sensitivity and glow curve.Results Single test proved that under 240 ℃ the dispersity,sensitivity and glow curve gained optimal results comprehensively,while repeated tests showed that the dispersity had the optimal value under 250 ℃ and the sensitivity decreased significantly as the times of annealing rose.Conclusion Annealing conditions have to be selected according to the requirements of the thermoluminescent detector.