Surprisingly Intense Neutron Emission from a Flare Behind the Limb of the Sun

Abstract

The Oriented Scintillation Spectrometer Experiment on board the Compton Gamma Ray Observatory observed a strong ux of neutrons from the behind- the-limb are that occurred on 1991 June 1. This is surprising if the neutrons were produced by thin target interactions in the Sun's corona as suggested by gamma-ray observations made by Granat/PHEBUS of this are. We compare neutron and gamma-ray observations of the June 1 are with thick target emissions observed from a flare three days later where the interactions took place in the chromosphere and photosphere. A very hard spectrum for the accelerated particles is required to account for the number of neutrons observed on June 1 if they were produced by thin-target interactions in the corona.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA461759

Entities

People

  • Gerald H. Share
  • K. W. Delsignore
  • Ronald J. Murphy
  • X. -m. Hua

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Atmospheres
  • Detectors
  • Emission
  • Gamma Rays
  • Hard X Rays
  • High Energy
  • Ionization
  • Neutron Capture
  • Neutrons
  • Observation
  • Particle Spectra
  • Photosphere
  • Radiation
  • Solar Atmosphere
  • Spectra
  • Sun
  • X Rays

Fields of Study

  • Physics

Readers

  • Solar Physics