Proceedings of the 4 th New World Luminescence Dating and Dosimetry

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This publication has not been reviewed for stratigraphic nomenclature. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. Measuring feldspars osl in a helium atmosphere: potential for improved reproducibility. Optically stimulated luminescence (OSL) is one of a class of measurements known as stimulated phenomena. Such phenomena may be stimulated thermally or optically and the reader is referred to works by Aitken (1998) and Botter-Jensen and others (2003) for more detail. In recent years OSL has become a popular procedure for the determination of environmental radiation doses absorbed by archeological and geological materials in an attempt to date these materials. The first OSL measurements on quartz and feldspar were made using an argon ion-laser (Huntley et al., 1985). However, the development of cheaper stimulation systems based first on filtered lamps and then on light-emitting diodes (LEDs) (Spooner, et al., 1990; Botter-Jensen, and others, 1999) has led to a massive expansion in OSL dating applications. The abstracts in this volume represent presentations from a workshop held in May-June 2006, at the Denver Federal Center, Denver, Colorado, in which OSL methodologies and applications were summarized and integrated to provide a current synthesis of the OSL science being applied throughout North America. was open to all scientists interested in OSL dating techniques and radiation dosimetry. Participants included thirty-six research scientists and students in geology, archaeology, and physics from the U.S. From Paleoindian Sites in Brazil ". The workshop encouraged everyone to interact more to develop a broader perspective on the types of research and the problems encountered when reporting OSL ages. This meeting follows the with a name change to New World Luminescence Dating Workshop). These workshops were interspersed with the international meetings on luminescence that were The presentation will deal with the methodological aspects and new applications of luminescence dating so as to provoke a discussion on some of these ideas. Some of the factors described below can be a potential source of systematic errors which have been overlooked, so far. The SAR protocol is now used extensively and we have investigated two aspects of systematic errors within its application in some detail. The first one relates to the change in the sensitivity during …