✦ LIBER ✦

Lifetime of solar flare particles in coronal storage regions

✍ Scribed by Kinsey A. Anderson

Publisher: Springer
Year: 1972
Tongue: English
Weight: 275 KB
Volume: 27
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00153115

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✦ Synopsis

Most discussions of lifetime of flare particles in the solar corona have assumed that collision loss is the dominant means of slowing and stopping these particles. The customary formulas used to estimate the rate of collision loss assume individual fast particles interacting with relatively cold matter. However, it is quite possible that the solar cosmic rays are not imbedded in I0 a K coronal material but rather all particles in the storage region are energetic. Collision times are sufficiently short so that the energy spectrum may approach a maxwellian distribution with kT on the order of 30 keV. If this is the case, the rate of collision loss will be greatly reduced. Bremsstrahlung and magnetobremsstrahlung then will be the important energy losses. To account for the presence of appreciable numbers of MeV particles, it is probably necessary to postulate the existence of a nonthermal tail in the stored particle distribution.

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