Properties of microcraters and cosmic dust of less than 1000 Å dimensions.
- ️@adsabs
- ️Mon Jan 01 1979
ADS
Abstract
Microcraters from about 100-200 A to larger than 1000 A true diameter have been measured by SEM at magnifications of 100,000x on lunar samples 76015,24,9003 and 76015,28,9004. The cumulative size frequency distribution has a slope of approximately -2.5 for craters larger than or equal to 1000 A, approximately -1.3 between 1000 A and 400 A diameters, and approaches zero at the smallest diameters. Distributions from lunar soil grains exposed during ancient epochs have the same form. Ninety-six of ninety-seven craters observed are equidimensional, indicating equidimensional dust particles with masses as low as 10 to the -20th grams. No lower limit on cosmic dust grain sizes was established. The flux and the crater production rate derived are consistent with 12054 measurements.
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Publication:
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Lunar and Planetary Science Conference Proceedings
Pub Date:
- 1979 Bibcode:
- 1979LPSC...10.1649M Keywords:
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- Cosmic Dust;
- Lunar Craters;
- Lunar Surface;
- Dimensional Measurement;
- Electron Microscopy;
- Frequency Distribution;
- Lunar Soil;
- Micrometeoroids;
- Particle Size Distribution;
- MICROCRATERS;
- MICROMETEORITES;
- COSMIC DUST;
- SOLAR WIND;
- ACCRETA;
- PRODUCTION RATES;
- ELECTRON MICROSCOPY;
- FREQUENCY DISTRIBUTION;
- DIAMETER;
- SAMPLES;
- LUNAR;
- SIZE;
- GRAINS;
- EXPOSURE HISTORY;
- EXPERIMENTS;
- PROCEDURE;
- PHOTOMICROGRAPHS;
- DATA;
- COMPARISONS;
- 76015;
- 12054;
- Lunar and Planetary Exploration; Miscellaneous;
- Moon Samples:Microcraters