Radioactive line emission from solar flares

V. Tatischeff*, B. Kozlovsky, J. Kiener, R. J. Murphy

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We have studied the radioactive line emission expected from solar active regions after large flares, following the production of long-lived radioisotopes by nuclear interactions of flare-accelerated ions. Total cross sections for the formation of the main radioisotopes by proton, 3He and a-particle reactions have been evaluated from available data combined with nuclear reaction theory. We point out several delayed lines that appear to be promising for detection, e.g. at 1434 keV from the radioactivity of both the ground state and isomer of 52Mn. The calculated solar delayed line emission is compared with a gamma-ray spectrum obtained in a recent experiment in which a sample of the Allende meteorite was activated by proton irradiation.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number622 SP
StatePublished - Jul 2006
Event6th Integral Workshop - The Obscured Universe - Moscow, Russian Federation
Duration: 2 Jul 20068 Jul 2006


  • Abundances - Sun: flares- Sun: X-rays
  • Gamma rays
  • Nuclear reactions
  • Nucleosynthesis


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