U.S.-Denmark Cooperative Research on Dosimetric Applicationsof Optically Stimulated Luminescence

9400070 McKeever该奖项支持俄克拉荷马州立大学的Stephen McKeever教授与丹麦罗斯基勒RISO国家实验室核安全研究部的Lars Boetter-Jensen博士开展合作研究。他们研究的最终目标是开发光刺激发光(OSL)在回溯性辐射剂量测量中的应用技术。他们目前的研究正在调查石英和长石等天然材料中OSL敏感性变化的机制。Riso在乌克兰切尔诺贝利研究期间率先取得的最新进展表明，在普通房屋砖中发现的硅酸盐矿物可能被用作当地的剂量计。与McKeever博士的合作将材料物理计算机建模方面的专业知识带到了丹麦集团独特的实验设施中。更好地了解由于热历史或其他因素导致的样品之间的灵敏度变化，将使他们能够开发技术来提高这些测量的灵敏度。由于与麦基弗博士的合作，似乎有可能进一步增强功能。这是辐射物理学中一项不同寻常的基础性研究，在测量辐射曝光量方面可能会有非常有价值的实际应用。更好的本地剂量计的开发对美国和整个世界都很重要，因为对当地环境辐射暴露历史的测量是主要关注的问题。如果成功，使用当地天然材料的方法简单，将允许快速绘制放射性污染的范围和程度的径向地图。***

9400070 McKeever This award supports Professor Stephen McKeever of Oklahoma State University to initiate collaborative research with Dr. Lars Boetter-Jensen of the Nuclear Safety Research Department of Riso National Laboratory, Roskilde, Denmark. The ultimate objective of their research is to develop techniques for the application of Optically Stimulated Luminescence (OSL) in retrospective radiation dosimetry. Their current research is investigating the mechanisms of OSL sensitivity variations in natural materials such as quartz and feldspar. Recent developments pioneered at Riso during studies at Chernobyl in the Ukraine suggest that the silicate minerals found in common house bricks could potentially be employed as local dosimeters. Collaboration with Dr. McKeever brings expertise in computer modeling of materials physics to the unique experimental facilities of the Danish group. A better understanding of the sensitivity variations which occur among samples as a result of thermal history, or other factors, will enable them to develop techniques to enhance the sensitivity of these measurements. Further enhancements seem likely as a result of the collaboration with Dr. McKeever. This is an unusual fundamental study in radiation physics which could have very valuable practical applications in the measurement of radiation exposures. The development of a better local dosimeter is important to both the U.S. and the world at large since the measurement of radiation exposure history to local environments is of major concern. If successful, the simplicity of methods using natural local materials would allow rapid radial mapping of the extent and degree of radioactive contamination. ***