Optical dating techniques employ ubiquitous quartz or feldspar grains to directly date the deposition of sedimentary units.As such, the optical dating methods allow the systematic chronological evaluation of Quaternary-age sedimentary sequences.
OSL Imaging can be accomplished using one of two methods.
OSL phosphors can be molded into flat sheets using a variety of commercially available plastics in order to provide an image plate that is analogous to X-ray film.
OSL light may be detected using photomultiplier tube (PMT) based readers or by capturing the emitted light in imaging applications using a charged-coupled device (CCD) camera.
The OSL laboratory contains a large variety of lasers and light sources; light measurements devices such as PMTs, photodiodes, infrared detectors, and CCDs; optical spectrometers and spectrophotometers; and custom and commercial OSL readers.
The DRILL welcomes collaboration with research institute and university faculty, consultants, and government agency researchers.
The DRILL research staff can collaborate on proposals, contribute to grant writing, and consult on study design.
The OLD Laboratory also provides a commercial luminescence dating service and works closely with clients in industry, archaeological organizations, environmental institutes and other academic groups.
Optically stimulated luminescence is a method of determining the age of burial of quartz or feldspar bearing sediments based upon principles of radiation and excitation within crystal lattices, and stems from the fact that imperfections in a crystal lattice have the ability to store ionizing energy (Radiation is absorbed by the crystal lattice upon sediment burial, and over time, excites electrons causing them to migrate within the crystal and become stored in traps resulting from crystal lattice defects.
Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating.