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Astron. Astrophys. 351, 382-384 (1999)

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Research Note

Mean free path of solar electrons and nucleons

R. Schlickeiser

Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany

Received 28 May 1999 / Accepted 9 August 1999


The quasilinear scattering mean free path of solar flare electrons and nucleons is calculated for interplanetary plasma wave turbulence consisting of a mixture of slab shear Alfvén waves and isotropic fast magnetosonic waves. It is shown that for well-sampled electron and nucleon mean free paths over a wide and overlapping energy range the underlying frequency power spectra of left-handed and right-handed slab Alfvén waves can be uniquely determined. Moreover, we demonstrate that the flatness and magnitude problems of quasilinear mean free paths of solar flare particles can be resolved if the interplanetary slab Alfvén magnetic power spectrum varies in wavenumber as [FORMULA] with [FORMULA] below [FORMULA] and [FORMULA] above [FORMULA] where [FORMULA] is the inverse of the ion skin length.

Key words: plasmas – turbulence – Sun: flares – Sun: particle emission

Send offprint requests to: R. Schlickeiser (rsch@tp4.ruhr-uni-bochum.de)

© European Southern Observatory (ESO) 1999

Online publication: November 2, 1999