Variation in ejecta size with ejection velocity

Details Variation in ejecta size with ejection velocity Variation in ejecta size with ejection velocity

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..726v&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, July 1987, p. 726-729.

Physics

45

Breccia, Craters, Ejecta, Impact, Particle Size Distribution, Velocity Distribution, Lunar Craters, Mars Craters, Planetary Craters, Turbulent Mixing

Scientific paper

The sizes and ranges of over 25,000 secondary craters around twelve large primaries on three different planets were measured and used to infer the size-velocity distribution of that portion of the primary crater ejecta that produced the secondaries. The ballistic equation for spherical bodies was used to convert the ranges to velocities, and the velocities and crater sizes were used in the appropriate Schmidt-Holsapple scaling relation of estimate ejecta sizes, and the velocity exponent was determined. The latter are generally between -1 and -13, with an average value of about -1.9. Problems with data collection made it impossible to determine a simple, unique relation between size and velocity.

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