THE EFFECT OF TRACE AND DELIBERATELY INTRODUCED IMPURITIES OF THERMOLUMINESCENCE AND THERMAL BLEACHING OF F-CENTRES IN KCl CRYSTALS

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · Phys. Letters

DOI:https://doi.org/10.1016/S0375-9601(63)96260-1· OSTI ID:4676380

Jain, S C; Mehendru, P C

The thermoluminescence and thermal bleaching of quenched crystals of spectroscopically pure KCl, annular KCl (BDH), and KCl crystals doped with 1% by weight of Ca and Cd impurities were measured. The curve for pure crystals has peaks at 93, 165, and 230 deg C, while the BDH curve has peaks only at 80 and 157 deg C. The curve for Cadoped crystal has peaks at 67 and 132 deg C; for Cd- doping, peaks occur at 77 and 107 deg C. The peaks are characteristic of the impurities and are reproducible. Measurements of thermal bleaching for the crystals also supported the idea that the rate of bleaching and hence the thermoluminescence are not uniquely dependent upon the binding energy of the F- electrons but depend on other factors also. (D.C.W.)

• Research Organization: National Physical Lab., New Delhi, India
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-030549
• OSTI ID: 4676380
• Journal Information: Phys. Letters, Journal Name: Phys. Letters Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BINDING ENERGY
BLEACHING
CADMIUM
CALCIUM
CHEMISTRY
COLOR
CRYSTALS
DIAGRAMS
ELECTRONS
HEAT TREATMENTS
IMPURITIES
LUMINESCENCE
MEASURED VALUES
POTASSIUM CHLORIDES
QUANTITATIVE ANALYSIS
QUENCHING
SPECTROSCOPY
STABILITY
TEMPERATURE
WEIGHT