Gamma Rays and Neutrons from a Large Solar Flare on November 6, 1997

Abstract

YohRoh observed a large solar flare (X9/2B) on November 6, 1997. The flare showed strong gamma-ray emission between 11 :S2 and 11:56 UT (peak phase) and several gamma-ray lines were detected. After 11: 56 UT a weak and extended gamma-ray emission was measured. The ratio of Mg+Si+Fe to C+O+Ne line fluxes was enhanced by a factor of about three in the extended phase. The Oriented Scintillation Spectrometer Experiment (OSSE) on board the Compton Gamma-Ray Observatory (CGRO) detected significant neutrons associated with the flare between 12:08 and 12:30 UT. The observed neutron count-rate time profile suggests that neutrons originated in interactions that occurred in both peak and extended phases.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA594350

Entities

People

  • Gerald H. Share
  • H. Ogawa
  • H. Takeda
  • K. Suga
  • M. Yoshimori
  • Ronald J. Murphy
  • S. Nakayama

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Bremsstrahlung
  • Electromagnetic Spectra
  • Emission
  • Energy
  • Gamma Rays
  • High Energy
  • Line Spectra
  • Military Research
  • Observation
  • Observatories
  • Production
  • Scintillation
  • Solar Flares
  • Solar Physics
  • Spectra
  • Spectrometers

Fields of Study

  • Physics

Readers

  • Solar Physics