Proton-electron bremsstrahlung polarization - solar flare X-ray and gamma-ray polarization

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165836· OSTI ID:5345784

Heristchi, D

In this paper the polarization of proton-electron bremsstrahlung is studied. The differential cross sections for the emitted photon with linear polarization are obtained by Lorentz transformation of the well-known electron-proton bremsstrahlung. Appreciable polarization occurs near both the low- and high-energy ends of the photon spectrum. It is also shown that the maximum polarization is obtained in the direction perpendicular to the particle trajectory for low-energy photons, the bremsstrahlung in this case being like dipole emission. The resulting polarization from a proton spectrum in a thick target is also given. The degree and direction of the polarization of solar flare X-rays are predicted from the model (spiraling protons in the solar magnetic field). These results are discussed in connection with previously measured values. 37 references.

• Research Organization: Paris Observatoire, Meudon, France
• OSTI ID: 5345784
• Journal Information: Astrophys. J.; (United States), Vol. 323
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BREMSSTRAHLUNG
POLARIZATION
SOLAR FLARES
GAMMA RADIATION
X RADIATION
LORENTZ TRANSFORMATIONS
SOLAR ELECTRONS
SOLAR PROTONS
BARYONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
IONIZING RADIATIONS
LEPTONS
NUCLEONS
PROTONS
RADIATIONS
SOLAR ACTIVITY
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
TRANSFORMATIONS
640104* - Astrophysics & Cosmology- Solar Phenomena