Measuring track densities in lunar grains using image analysis

Details Measuring track densities in lunar grains using image analysis Measuring track densities in lunar grains using image analysis

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994lpi....25..125b&link_type=abstract

In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 1: A-G p 125-126 (SEE N94-35395 11-9

Computer Science

Computerized Simulation, Image Analysis, Lunar Soil, Particle Tracks, Radiation Effects, Backscattering, Cosmic Rays, Energetic Particles, Image Contrast, Lunar Geology

Scientific paper

We have used digitized scanning electron micrographs and computer image analysis programs to measure track densities in lunar soil grains. Tracks were formed by highly ionizing solar energetic particles and cosmic rays. Back-scattered electron images produced suitable high contrast images for analysis. We used computer counting and measurement of area to obtain track densities. We found an excellent correlation with manual measurements for track densities below 1x108 cm-2. For track densities between 1x108 to 1x109 cm-2 we found that a regression formula using the percentage area covered by tracks gave good agreement with manual measurements. Measurement of tract densities in lunar samples has been a very rewarding technique for measuring exposure ages and soil maturation processes. We have shown that we can reliably measure track densities in lunar grains using image analysis techniques. Automating track counting may allow application of this technique to important problems in regolith dynamics including the ratio of radiation exposure to reworking in various surface and core samples and in regolith breccias.

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