Comptel measurements of solar flare neutrons
The ability to measure solar flare neutrons by the COMPTEL γ-ray telescope on-board the Compton Gamma Ray Observatory has been demonstrated during the observations of the powerful solar flares of June 1991 from Active Region 6659. We present intensity-time profiles and count rate spectra from the impulsive X10 flare on 1991 June 19 and the prolonged X12+ flare on 1991 June 15. The emission of neutrons during the 9 June flare is coincident in time with the impulsive γ-ray emission, while the neutron emission during the 15 June flare takes place from the time of the X-ray maximum and for at least 30 minutes thereafter. The detected neutrons can also be used to image the Sun in heavy particles, the first time a celestial object has been imaged in radiation other than electromagnetic radiation.
Advances in Space Research
Digital Object Identifier (DOI)
J. Ryan, K. Bennett, H. Debrunner, D. Forrest, J. Lockwood, M. Loomis, M. McConnell, D. Morris, V. Schönfelder, B. N. Swanenburg, and W. Webber, ‘Comptel measurements of solar flare neutrons’, Advances in Space Research, vol. 13, no. 9, pp. 255–258, Sep. 1993.