Lithium-6 from Solar Flares

Details Lithium-6 from Solar Flares Lithium-6 from Solar Flares

2000-03-23

arxiv.org/abs/astro-ph/0003356v1

Astronomy and Astrophysics

Astrophysics

latex 9 pages, 2 figures, ApJ Letters in press

Scientific paper

10.1086/312671

By introducing a hitherto ignored Li-6 producing process, due to accelerated He-3 reactions with He-4, we show that accelerated particle interactions in solar flares produce much more Li-6 than Li-7. By normalizing our calculations to gamma-ray data we demonstrate that the Li-6 produced in solar flares, combined with photospheric Li-7, can account for the recently determined solar wind lithium isotopic ratio, obtained from measurements in lunar soil, provided that the bulk of the flare produced lithium is evacuated by the solar wind. Further research in this area could provide unique information on a variety of problems, including solar atmospheric transport and mixing, solar convection and the lithium depletion issue, and solar wind and solar particle acceleration.

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