Optically stimulated luminescence signals of polymineral fine grains in the JSC Mars-1 soil simulant sample.
The results of various experiments which characterise the optically stimulated luminescence (OSL) signals from polymineral fine grains of a Martian soil simulant sample (JSC Mars-1) are presented. The blue-green stimulated luminescence signal has greater thermal stability than the infrared stimulated luminescence signal for pre-heat temperatures between 250 degrees C and 400 degrees C. Fading tests over a 2 month storage period at 20 degrees C indicate that in some aliquots of JSC Mars-1 both the blue-green stimulated luminescence and the infrared stimulated luminescence signals fade by as much as 50%, whereas in others there is no evidence of significant fading. Dose recovery experiments demonstrate that equivalent dose (measured/given) ratio varies from aliquot to aliquot, and the underestimation in dose is less than 5% for at least one aliquot, for both the infrared and blue-green stimulated luminescence signals.
Banerjee
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Depratment of Physics, Oklahoma State University, Stillwater 74078, USA. bdebabr@okstate.edu
Blair
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M
Lepper
K
K
McKeever
S W S
SW
D008163:Luminescent Measurements; D018535:Mars; D008903:Minerals / Q000032:analysis*; D013026:Space Flight; D013819:Thermoluminescent Dosimetry; D014481:United States; D018557:United States National Aeronautics and Space Administration
D008903:Minerals