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Modulation of solar flare particles and track density profiles in gas-rich meteorite grainsA 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.
Document ID
19760056165
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lee, M. A.
(Washington University St. Louis, Mo., United States)
Date Acquired
August 8, 2013
Publication Date
July 1, 1976
Publication Information
Publication: Journal of Geophysical Research
Volume: 81
Subject Category
Solar Physics
Accession Number
76A39131
Funding Number(s)
CONTRACT_GRANT: NGL-26-008-065
Distribution Limits
Public
Copyright
Other

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