北京清水河流域现代稀性泥石流表层物质热释光本底初步研究  

Preliminary Research of TL Background Radiation for Modern Turbulent Debris Flow Surface Materials in QingShui River Basin

作　　者：周锐[1] 魏明建[1] 刘超[1] 何友兵[1] 李东旭[1] 

机构地区：[1]首都师范大学释光断代实验室,北京100048

出　　处：《核电子学与探测技术》2010年第8期1059-1062,共4页Nuclear Electronics & Detection Technology

基　　金：北京市自然基金资助项目<北京清水河流域第四纪泥石流发育史与环境演变>(8102013)

摘　　要：应用热释光技术对北京清水河流域稀性泥石流表层物质进行热释光信号测定,西北山沟、达摩沟、前桑峪沟三沟的形成区等效剂量平均值为48.38 Gy,流通区的平均值为91.75 Gy,堆积区的平均值为62.02 Gy。三个沟的表层泥石流物质本底小,说明原有的认为泥石流由于受物源本底影响无法测年的认识是有局限性的。这个事实可以为应用热释光对老泥石流测年提供依据,对于在泥石流堆积物质中应用热释光技术进行年代测定具有基础性的意义。It intends to apply thermoluminescence technology to detect the thermoluminescence signal of Modem turbulent debris flow surface materials in QingShui River Basin, acquiring the average equivalent dose of origin substance, cumulus substance of transition area and surface moraine of accumulative area from XiBeiMount Gully, DaMo Gully and QianSangyu Gully is respectively 48.38 Gy, 91.75 Gy and 62.02 Gy. The background radiation of turbulent debris flow surface materials for the three gullies are very low indicates that the understanding of ＂the debris flow cant be dated because of the impact of its origin substance＂ has its own limitation. The fact provides a basis for using thermolumineseence technology to date old debris flow cance in the application of TL dating techniques to date debris flow.

关 键 词：等效剂量 热释光 稀性泥石流 

分 类 号：TL824[核科学技术—核技术及应用]