Solar Particle Tracks in Glass from the Surveyor 3 Spacecraft

Details Solar Particle Tracks in Glass from the Surveyor 3 Spacecraft Solar Particle Tracks in Glass from the Surveyor 3 Spacecraft

Mar 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971sci...171.1237c&link_type=abstract

Science, Volume 171, Issue 3977, pp. 1237-1239

Computer Science

15

Scientific paper

A glass filter from Surveyor 3 has a surface density of ~ 1 × 106 tracks per square centimeter from heavy solar flare particles. The variation with depth is best fitted with a solar particle spectrum dN/dE = 2.42 × 106 E-2 [in particles per square centimeter per year per steradian per (million electron volts per nucleon)], where E is the energy and N is the number of particles, from 2 million electron volts per nucleon to ~ 7 million electron volts per nucleon and dN/dE = 1.17 × 107 E-3 at higher energies. Not much difference is observed between 0.5 and 5 micrometers, an indication that there is a lack of track-registering particles below 0.5 million electron volts per nucleon. The Surveyor data are compatible with track results in lunar rocks, provided an erosion rate of ~ 10-7 centimeter per year is assumed for the latter. The results also suggest a small-scale erosion process in lunar rocks.

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