Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4

Details Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4 Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...429..400s&link_type=abstract

The Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 429, no. 1, p. 400-405

Astronomy and Astrophysics

Astrophysics

20

Gamma Rays, High Energy Interactions, Solar Flares, Solar Neutrons, Spectral Emission, Gamma Ray Observatory, Particle Emission, Proton Energy, Radio Observation

Scientific paper

The time profile of Norikura neutron monitor count rates during the 1991 June 4 X12.0 solar flare shows two humps which have been recognized as being caused by high-energy solar neutrons. The first hump was observed during 03:41-04:10 UT and the second during 04:15-05:05 UT. An apparant discontinuity in the 2.223 MeV and 4.44 MeV gamma-rays intensities occured between 04:05 and 04:40 UT according to the Compton Gamma-Ray Observatory (CGRO) Oriented Scintillation Spectrometer Experiment (OSSE) data during the satellite nighttime. A new maximum of radio emission intensity was observed between 04:21 and 04:25 UT by several radio observations. These data strongly support the existence of a second proton acceleration episode separated by about 30 minutes from the impulsive phase of the flare. In order to explain the neutron monitor data, we have to consider two long-duration ejection periods of high-energy neutrons, starting approximately at 03:37 and 04:12 UT. Assuming that the total number of neutrons in the 0.1-3 GeV energy range is proportional to the 2.223 MeV gamma-ray intensity, estimations of the neutron spectra can be made. The spectrum of the first hump was softer than that of the second hump. The total energy of neutrons in the 0.1-3 GeV energy band was estimated to be about 2.7 x 1026 ergs and 1.3 x 1026 ergs during the first and the second production, respectively.

Affiliated with

Also associated with

No associations

Rating

Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence of additional production of high-energy neutrons during the solar flare on 1991 June 4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1252991