石英晶体的375℃热释光峰特性

The 375 ℃ Thermoluminescence Peak of Quartz

石英375℃热释光峰存在灵敏度的变化,其变化因所接受的辐照剂量不同而不同。本工作采用多片技术测定了石英375℃热释光峰灵敏度与不同辐射类型(α和β)、辐照剂量的关系。结果表明,将石英作为剂量计利用其375℃峰测量辐射源强度时,应先将石英进行大剂量辐照,β辐射剂量不低于4 500 Gy,α辐射剂量不低于6 000 Gy,保证所标定的放射源强度的准确性。此外,在利用375℃高温峰测定地质样品的年龄时,也应根据灵敏度的变化对所测定的等效剂量予以适当的校正,以保证测定年龄的精确程度。

The radiation response of 375℃ thermoluminescence（TL） peak of quartz can be changed, it is variedly with the radiation dose which the crystal accepted from the environment. The multi disk technology is used to measure the sensitive variation of 375℃ TL peak with the radiation dose. The results show that it must be calibrated in any experiment for quartz TL either as dosimeter or as TL dating. When it is used as dosimeter, it must he radiated with big dose, which dose is 4 500Gy for β-source and 6000 Gy for α-dose. Otherwise, when the age of geological samples is measured by using 375 ℃ TL peak of quartz, the equivalent dose should be rectified with the sensitivity change of TL peak, so that the accuracy of geological samples age can be ensured.