Recent developments in thermoluminescence kinetics

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6785619

Levy, P W

Thermoluminescence (TL) kinetics have been investigated that are more general than those described by the well known 1st and 2nd order kinetic equations. Single glow peak systems studied include the general one-trap kinetic expression from which the 1st and 2nd order kinetics re derived. Glow curves computed from this expression were regarded as data, and their properties determined by inspection and by fitting to the less general 1st and 2nd order kinetics. Often the computed glow curves are well fitted by the 1st and/or 2nd order kinetics over their upper 60 percent, but not in the wings. The best-fit determined kinetic parameters usually differ appreciably from those used to compute the data curves. The properties of the general one-trap kinetics are exemplified by measured glow curves from CaF/sub 2/:Mn. To describe systems with two or more glow peaks, kinetics have been developed that appear to be the simplest possible extension of the general one-trap kinetic expression that describes the retrapping of thermally released charges on all traps present. Called interactive TL kinetics, its properties have also been studied by computing glow curves and determining their properties by inspection and fitting to 1st and 2nd order glow peaks. The interactive kinetic glow curves exhibit all of the properties mentioned above for single peak glow curves and, in addition, reproduce many experimentally determined features that are anomalous and/or not described by the usual 1st and 2nd order kinetics. Also, glow curves computer from the interactive kinetic equations for increasing initial trapped charge concentrations, i.e. increasing premeasurement doses, exhibit supralinearity. Thus the little understood supralinearity appears to be a natural property of TL systems described by intereactive kinetics.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6785619
• Report Number(s): BNL-34839; CONF-840290-1; ON: DE84013226
• Country of Publication: United States
• Language: English

Related Subjects

440102* -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
FLUORIDES
FLUORINE COMPOUNDS
GLOW CURVE
HALIDES
HALOGEN COMPOUNDS
KINETICS
LUMINESCENCE
MANGANESE ADDITIONS
MANGANESE ALLOYS
THERMOLUMINESCENCE
TRAPS