Theoretical Aspects of Solar X-Radiation

  • C. De Jager
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 9)


In physics X-radiation is defined as electromagnetic radiation originating from electronic transitions involving the lowest electron shells; gamma rays are of nuclear origin. Mostly gamma rays are harder than X-rays. This distinction has not rigorously been followed in the astronomical literature, and in actual fact, it has sometimes only been the energy of the solar quanta that was used to classify them. However, one had better avoid confusion and keep to the physical definition. Hence solar energetic radiation will only be called gamma radiation if it is certain that the radiation is of nuclear origin. Since such radiation has not yet been observed the conclusion must be that all energetic solar radiation observed so far must be classified as X-radiation. But in this class of radiation a certain distinction can certainly be made.


Solar Flare Solar Corona Radio Burst Radio Observation Dielectronic Recombination 
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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1967

Authors and Affiliations

  • C. De Jager
    • 1
  1. 1.University Observatory ‘Sonnenborgh’ and Space Research LaboratoryUtrechtThe Netherlands

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