A comparison of helium and heavy ion spectra in He/3/ rich solar flares with a model calculationHe isotopes, O and Fe in He(3) rich solar flares are studied during the 1977 to 1979 period with the MPI/UoMd particle experiment on ISEE-1 and ISEE-3. The study revealed that the He(3) spectrum is generally harder than that of He(4), and the O spectrum is harder than that of Fe. The spectra are compared with a stationary model based on stochastic Fermi acceleration in Alfven turbulence including a rigidity dependent particle loss. Model calculations fit the He(3) and He(4) spectra between 0.4 and 4.0 MeV/nucleon, with discrepancies at lower and higher energies, and the O and Fe spectra cannot be fitted simultaneously.
Document ID
19820039077
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Mobius, E. (Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Hovestadt, D. (Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Klecker, B. (Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Scholer, M. (Max-Planck-Institut fur Physik und Astrophysik Garching, Germany)
Gloeckler, G. (Maryland, University College Park, MD, United States)