Fukuda Yasunori
Department of Urban Environment, Osaka Sangyo University, Nakagaito 3-1-1, Daito, Osaka, 574-8530, Japan.
J Radiat Res. 2002 Dec;43 Suppl:S67-9. doi: 10.1269/jrr.43.s67.
In order to observe and estimate the dose of ultraviolet (UV) radiation, the thermoluminescence (TL) of sintered CaF2 doped with Tb4O7 and Sm2O3 was studied. A several kind of lanthanides elements are doped in pure CaF2 powder crystals and properties of the TL to UV radiation were observed. The TL intensity from CaF2:Tb was the highest among the samples doped other lanthanide elements. The TL emission may be due to the recombination reaction; Tb2+ + hole-->Tb3+*-->Tb3+ + hv. The TL peaks are observed at about 353 K, 378 K and 458 K. It was found that the 378 K TL peak intensity of CaF2:Tb became strong by addition of Sm2O3. The 378 K TL peak may also be suitable for use as a dosimeter.
为了观察和估算紫外线（UV）辐射剂量，研究了掺杂Tb4O7和Sm2O3的烧结CaF2的热释光（TL）特性。在纯CaF2粉末晶体中掺杂了几种镧系元素，并观察了其对紫外线辐射的热释光特性。在掺杂其他镧系元素的样品中，CaF2:Tb的热释光强度最高。热释光发射可能归因于复合反应：Tb2+ + 空穴→Tb3+*→Tb3+ + hv。在约353K、378K和458K处观察到热释光峰。发现添加Sm2O3后，CaF2:Tb的378K热释光峰强度增强。378K热释光峰也可能适用于用作剂量计。
