Tl dating laboratory
Frequently, however, students and experts alike need to clarify some concepts related to the effects and defects present in the radiation interaction with solids generated by these phenomena.
The concepts, theory and models related to TL and OSL, including applications in important related areas.
The external source of energy is naturally occurring, ionizing radioactivity (alpha, beta, gamma and cosmic radiation).
This "dark (amber-light only) lab" contains rooms for sample storage, sample preparation, and OSL readers. This lab primarily serves UNL faculty and graduate students, but collaborative research is ongoing with colleagues from other institutions. Recent advances in methodology and instrumentation have improved both its accuracy and precision, such that it is now becoming an important player in Quaternary science.The advantage luminescence has over other techniques is the ability to date directly events of archaeological and geological interest: the last heating of ceramics and lithics and the last exposure of light for sediments.Subsequent to zeroing, traps become refilled because of continued ionization by radioactivity and a latent luminescence signal steadily accumulates.In the laboratory the traps are again emptied and the intensity of the natural luminescence signal measured, TL or OSL, is proportional to the concentration of trapped charge that has accumulated.