熱ルミネッセンス線量計,MgSO4:Mn

概要

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The present investigation was undertaken as a preliminary experiment on MgSO4 : Mn thermoluminescence dosimeter. The sample for this study was prepared by the method most commonly used, that is, heatinga mixture of MgSO4 : 2H2O and MnSO4 : H2O to 1OOO゜C. In the glow curve of our MgSO4 : Mn, the luminescence glow reached the maximum at about 85゜C, 120゜C and. 250゜C. The response of these glow peaks was linear up to 2400 milliroentgens at least. The rate of the decay of the peaks at 85゜C and 120゜C were about 6 percent and 5 percent per hour, respectively at　7゜C. The decay of the 250゜C peak was very small ; less than 25 percent was lost during the first 24 hours. The peaks at 85゜C and 250゜C showed the maximum sensitivty to the radiation when the sample was prepared 2.5mole percent mixture of MnSO4 : H2O and that of 120゜C did the same at I mole percent mixture. Thus, it was found that this dosimeter detected a dose as low as 5 milliroentogens. Furthermore, it was observed that the peak at 250゜C showed very high sensitivity for triboluminescence.
奈良学芸大学の論文