Thermoluminescence of LiF TLD-100: Glow-curve kinetics
The thermoluminescence kinetics have been determined for the 13 glow peaks contained in the glow curves obtained from LiF TLD-100 after exposure to /sup 60/Co irradiations. The glow curves were constructed from measurements made with recently developed equipment for recording emission spectra at closely spaced temperature intervals. In addition, the recorded data has been subjected to all corrections needed to make it suitable for reliable kinetic analysis. The recorded emission spectra can be described by a single Gaussian-shaped band whose width and peak-energy parameters vary erratically with temperature or, alternatively, by resolving the observed spectra into three Gaussian-shaped bands whose parameters vary with temperatures in accord with theoretical expressions relating the emission-spectra peak energy and full width at half-maximum to the sample temperature. The kinetics and kinetic parameters were independently determined for the two most intense resolved emission bands. All peaks are described by first-order kinetics and the independently determined parameters are in very good agreement. The glow curves for the least intense component are also described by the same kinetics and parameters. Inasmuch as the single-band emission is a superposition of the three components, the same kinetics and parameters apply to the glow curve constructed from unresolved spectra. Thenominal peak temperature in /sup 0/C, the activation energy and preexponential factor s (sec/sup -1/) for the 13 peaks observed are reported. The unusual value of s = 10/sup 22/ for the 190 /sup 0/C peak, previously reported by other authors, was obtained during this study. However, it appears that this value can be obtained from relatively simple mechanisms, and one of these is described.
- Research Organization:
- Brookhaven National Laboratory, Upton, Long Island, New York 11973
- OSTI ID:
- 6840970
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:8; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
DOPED MATERIALS
DOSE-RESPONSE RELATIONSHIPS
DOSEMETERS
DOSIMETRY
EMISSION SPECTRA
FLUORIDES
FLUORINE COMPOUNDS
GLOW CURVE
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRRADIATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
LUMINESCENCE
LUMINESCENT DOSEMETERS
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
REACTION KINETICS
SPECTRA
SPECTRAL SHIFT
TEMPERATURE DEPENDENCE
THERMOLUMINESCENCE
THERMOLUMINESCENT DOSEMETERS
THERMOLUMINESCENT DOSIMETRY
YEARS LIVING RADIOISOTOPES