Modulation of solar flare particles and track density profiles in gas-rich meteorite grains

Details Modulation of solar flare particles and track density profiles in gas-rich meteorite grains Modulation of solar flare particles and track density profiles in gas-rich meteorite grains

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.3207l&link_type=abstract

Journal of Geophysical Research, vol. 81, July 1, 1976, p. 3207-3213.

Physics

3

Meteoritic Composition, Particle Density (Concentration), Particle Tracks, Solar Corpuscular Radiation, Solar Flares, Density Distribution, Irradiation, Kinetic Energy, Long Term Effects, Solar System, Stellar Evolution

Scientific paper

A solution is presented to the problem concerning the time-averaged solar flare particle flux as a function of kinetic energy and distance from the sun for a given particle injection spectrum at the sun within the framework of standard diffusion-convection-adiabatic deceleration theory with the diffusion coefficient independent of distance from the sun. Results of the calculations which give best agreement with observations at 1 AU are presented and discussed, with particular reference to their implications for gas-rich meteorites. Normalization at the orbit of earth is achieved via observed track density versus depth profiles in lunar vug crystals. It is shown that if gas-rich meteorite grains were irradiated in the asteroid belt and if source and modulation parameters have changed little since irradiation, the track density should be 'harder' than the lunar vug profile by about 0.2-0.3 in the index. Quantitative estimation of solar flare particle exposure ages is discussed.

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