Measurements of the thermoluminescence sensitivity of meteorites.
Abstract
Various methods for the measurement of the thermoluminescence sensitivity of meteorites are examined. Powdered samples of six meteorites were monitored for thermoluminescence as a function of sample temperature following irradiation by several test doses and following treatment by heat or UV bleaching to remove the natural thermoluminescence and subsequent exposure to a standard radiation dose. The thermoluminescence sensitivity measured as the slope of the linear portion of a plot of thermoluminescence versus dose is found to provide results equivalent to that measured from a previously drained sample provided the standard dose chosen lies on the linear portion of the plot. In UV bleaching, the conditions of UV exposure are determined by the level of thermoluminescence to be removed and the radiation dose to be administered, and no evidence of photo-transfer is obtained. Thermal draining (heating to 500 C), on the other hand, is found to result in a decrease in the thermoluminescence induced by a standard test dose. It is thus concluded that sensitivity determinations that involve heating should not be compared with those which do not.
- Publication:
-
Modern Geology
- Pub Date:
- 1980
- Bibcode:
- 1980ModGe...7..201S
- Keywords:
-
- Meteorites;
- Shock Heating;
- Thermoluminescence;
- Ultraviolet Radiation;
- Bleaching;
- Radiation Dosage;
- Sensitivity;
- Temperature Distribution;
- Meteorites:Thermoluminescence