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X-Ray Emissions from Solar Flares and from Celestial Sources

Published online by Cambridge University Press:  25 April 2016

T. A. Chubb
T. A. Chubb*
Affiliation:
Department of Physics, University of Adelaide
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Extract

One of the interesting questions in solar X-ray astronomy is the question as to whether the hard X-ray emission which occurs during major solar flares is a thermal or nonthermal phenomenon. The evidence for non-thermal emission has been based in large measure on a balloon-borne experiment by Peterson and Winckler, which constituted the first detection of high energy flare X-rays. In the Peterson-Winckler experiment, the incident solar X-rays were measured by both an ion chamber and a Geiger counter photometer, and from the ratio of responses, the hardness character of the incident X-rays was reduced. It was concluded that the observed result could have been explained in terms of the sudden non-thermal production of a group of electrons with energy of the order of 500 kilovolts.

Type
Invited Papers
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 1 , January 1967 , pp. 4 - 5
Copyright
Copyright © Astronomical Society of Australia 1967

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