Solar flare gamma-ray line shapes

Details Solar flare gamma-ray line shapes Solar flare gamma-ray line shapes

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..349w&link_type=abstract

(NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988) Astrophysical Jou

Astronomy and Astrophysics

Astrophysics

8

Gamma Ray Spectra, Line Spectra, Solar Flares, Carbon, Computer Programs, Doppler Effect, Energy Spectra, Oxygen, Particle Beams

Scientific paper

A computer code has been developed which is used to calculate ab initio the laboratory shapes and energy shifts of gamma-ray lines from (C-12)(p, gamma/4.438/)p-prime(C-12) and (O-16)(p, gamma/6.129/)p-prime(O-16) reactions and to calculate the expected shapes of these lines from solar flares. The sensitivity of observable solar flare gamma-ray line shapes to the directionality of the incident particles is investigated for several projectile angular distributions. Shapes of the carbon and oxygen lines are calculated assuming realistic proton energy spectra for particles in circular orbits at the mirror points of magnetic loops, for particle beams directed downward into the photosphere, and for isotropic particle distributions. Line shapes for flare sites near the center of the sun and on the limb are shown for both thin-target and thick-target interaction models.

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