Solar gamma-ray lines as probes of accelerated particle directionalities in flares

Details Solar gamma-ray lines as probes of accelerated particle directionalities in flares Solar gamma-ray lines as probes of accelerated particle directionalities in flares

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..766r&link_type=abstract

Astrophysical Journal, vol. 203, Feb. 1, 1976, pt. 1, p. 766-768.

Astronomy and Astrophysics

Astrophysics

20

Doppler Effect, Gamma Rays, Particle Acceleration, Solar Flares, Solar X-Rays, Anisotropy, Energy Spectra, Line Shape, Line Spectra, Oxygen Spectra, Red Shift, Solar Radiation, Solar Spectra, Spectral Energy Distribution

Scientific paper

Anisotropies of charged particles accelerated in solar flares can be studied by observing Doppler shifts of selected gamma-ray lines. The spectral shape of the 6.1-MeV line of O-16 is calculated. If the accelerated particles are isotropic, the line remains centered at an emitting-nucleus rest-frame energy of 6129.4 keV, and its width (FWHM) is about 100 keV. However, for particle anisotropies that may be produced in solar flares, the line is shifted to lower energies by about 30 to 40 keV.

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