Accession Number:

ADA461759

Title:

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

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH

Report Date:

1998-01-01

Pagination or Media Count:

21.0

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 Suns corona as suggested by gamma-ray observations made by GranatPHEBUS 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.

Subject Categories:

  • Astronomy
  • Astrophysics
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE