熱発光線量計用LiFの熱処理効果
1968 年 37 巻 3 号 p. 231-236
詳細
1968 年 37 巻 3 号 p. 231-236
The sensitivity improvements on LiF phosphors as thermoluminescent dosimeters were made with the method of thermal treatments. In the investigation of thermal treatment method, the atmosphors used were air, nitrogen and argon gasses. The thermoluminescent yields of the phosphor which were treated at 600°C in argon gass for 500hr were given about 95% as compared with the yields of Harshaw TLD-100 LiF phosphors.
In case of thermal treatments in air, LiF phosphors treated at 400°C had good sensitivity for exposure of ionizing radiation.. But the treated crystals in air contained OH ion and its transmission decreased in comparison with original crystals. It was reported that poor sensitivity of treated phosphors in air at higher temperatures is caused by the killer action of OH ion for thermoluminescence phenomena and the decrease of transmission.
