High-energy processes in solar flares

Journal Article · Sun Mar 01 00:00:00 EST 1987 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/191180· OSTI ID:6323918

Murphy, R J; Dermer, C D; Ramaty, R

A detailed study of high-energy processes in solar flares is reported, including the production of neutrons and pions, and incorporating isobaric and scaling models and a recent compilation of pion production data (Dermer, 1986). The broad-band gamma-ray spectrum resulting from the decay of neutral pions, the bremsstrahlung of positrons and electrons from the decay of charged pions, and the annihilation in flight of positrons is evaluated. Also evaluated is the 0.511 MeV gamma-ray line resulting from the annihilation of the positrons which survive annihilation in flight. Calculations were based on an isotropic, thick-target model using the best available nuclear data and models. Results are compared with extensive observation of the June 3, 1982 flare (10-120 MeV gamma rays), 0.511 and 2.2 MeV line emission, nuclear line emission, high-energy neutrons, and interplanetary charged particles. 75 references.

• Research Organization: NASA, Goddard Space Flight Center, Greenbelt, MD
• OSTI ID: 6323918
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Vol. 63
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SOLAR FLARES
PARTICLE INTERACTIONS
ACCELERATION
BREMSSTRAHLUNG
GAMMA SPECTRA
NEUTRON SPECTRA
PARTICLE PRODUCTION
PIONS
SOLAR ATMOSPHERE
SOLAR RADIATION
ATMOSPHERES
BOSONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
HADRONS
INTERACTIONS
MESONS
PSEUDOSCALAR MESONS
RADIATIONS
SOLAR ACTIVITY
SPECTRA
STELLAR RADIATION
640104* - Astrophysics & Cosmology- Solar Phenomena