Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..388h&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 388-390 (SEE N87-23341 16-91)
Physics
Geophysics
Collisions, Ejecta, Fragmentation, Impact Loads, Projectile Cratering, Basalt, Flux Density, Obliqueness, Velocity
Scientific paper
The reduction and publication of an extensive data set collected in experiments over several years at Ames and PSI is briefly examined. Hartmann has been assembling data sets from his experiments on catastrophic fragmentation of various materials, including basalt, other igneous rock, ice, and weak dirt clods. Weidenschilling and Davis have continued to gather and reduce data on oblique impacts. The data indicate a power law distribution of ejecta mass vs. velocity, with a slope that is independent of azimuth, and does not vary with impact angle from normal impacts to at least 75 deg from vertical. In order to improve models of coagulation of dust aggregates in the solar nebula, SJW developed an apparatus for drop tests of fragile projectiles. Davis and Weidenschilling continued to collect and analyze experimental data on collisional catastrophic disruption at the Ames Vertical Gun Range.
Davis Donald R.
Hartmann William K.
Weidenschilling Stuart J.
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