Physical Implications of RHESSI Neutron Capture-Line Measurements

Details Physical Implications of RHESSI Neutron Capture-Line Measurements Physical Implications of RHESSI Neutron Capture-Line Measurements

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3195m&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

We report high spectral-resolution measurements of the 2.223 MeV neutron capture-line obtained with the Reuven Ramaty High Energy Spectroscopic Imager (RHESSI) from the 2002 July 23 solar flare. The measured time history is compared with predicted time histories calculated using a magnetic loop model with a magnetic field perpendicular to the solar surface at the fo otp oints. The derived constraints on the interacting-particle angular distribution imply that the particles suffered pitch-angle scattering during transport through the coronal portion of the loop. The photospheric 3 He/H ratio was not well-constrained, primarily due to uncertainties of the measured nuclear deexcitation-line flux used to represent the neutron-pro duction time history.

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