Principles determining the length of time materials can be dated by TL (thermoluminescence), ESR (electron spin resonance) and other trapped charge buildup methods
The dating of nonmetallic objects by thermoluminescence (TL), electron spin resonance (ESR), optically stimulated luminescence (OSL), and similar methods is possible only when these objects possess certain properties that determine the length of time that the dating method will be valid. These, and other properties also determine the useful temperature range, the precision, accuracy and other effects that influence the dating procedure. The most important factors that contribute to the dating of rocks and minerals will described. Detailed descriptions will not be attempted. The length of time materials can be dated by TL, ESR and other methods based on tapped charge buildup during irradiation depends on the trap concentration vs. dose curve. If the trap concentration is constant, i.e., independent of dose, the datable period is less than the time required to ''fill up'' the traps, usually 10/sup 3/ to 10/sup 5/ Gy. If the trap concentration increases with dose the datable period can be 10/sup 3/, or more, times longer. 2 refs.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6040500
- Report Number(s):
- BNL-42907; CONF-8904251-1; ON: DE89015107
- Resource Relation:
- Conference: Workshop on the length of time materials, Oxford, UK, 11-13 Apr 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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