Trautmann T, Dietrich A, Stolz W, Krbetschek MR
TU Bergakademie Freiberg, Institute of Applied Physics, B. v. Cotta-Strasse 4, D-09596 Freiberg, Germany.
Naturwissenschaften. 1999 Sep;86(9):441-4. doi: 10.1007/s001140050649.
Natural minerals, such as widespread quartz and feldspars, have physical properties which enable them to be used as radiation dosimeters. The underlying luminescence phenomena have made it possible in recent decades to determine the age of a variety of materials important for quaternary geochronometry and archaeochronometry. We present a new luminescence dating method based on radioluminescence measurements of potassium feldspar. For the first time we have been able to investigate the light-emitting transition of electrons from the conduction band to an optically sensitive electron trap. Many advantages can be derived from such direct measurements of the metastable electron density in this particular trap, which produces the age-dependent signal. The method can be used to date the last light exposure of feldspar grains within a range of a few hundred to more than 200,000 years. Examples are presented of age determination of various waterlaid quaternary sands. The results of a basic study of feldspar radioluminescence also shed light on effects not sufficiently understood in conventional dating by luminescence techniques, especially in infrared optically stimulated luminescence dating of feldspar. http://link.springer. de/link/service/journals/00114/bibs/9086009/90860441.htm</HEA
天然矿物，如分布广泛的石英和长石，具有一些物理特性，使其能够用作辐射剂量计。近几十年来，潜在的发光现象使得确定对第四纪地质年代学和考古年代学至关重要的各种材料的年龄成为可能。我们提出了一种基于钾长石辐射发光测量的新的发光测年方法。我们首次能够研究电子从导带跃迁到一个对光敏感的电子陷阱的发光过程。通过对这个产生与年龄相关信号的特定陷阱中的亚稳态电子密度进行这种直接测量，可以获得许多优势。该方法可用于测定长石颗粒在几百到超过20万年范围内的最后一次光照年代。文中给出了各种水成第四纪砂的年龄测定实例。长石辐射发光的基础研究结果也揭示了传统发光技术测年中尚未充分理解的效应，特别是在长石的红外光激发发光测年中。http://link.springer.de/link/service/journals/00114/bibs/9086009/90860441.htm
