Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991reds..122..625h&link_type=abstract
Radiat. Eff. Defects Solids, Vol. 122-123, Part 2, p. 625 - 641
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
The behavior of electromagnetic processes in strong magnetic fields is currently of great interest in high-energy astrophysics. Strong magnetic fields affect the physics in several fundamental ways: energies perpendicular to the field are quantized, transverse momentum is not conserved and electron/positron spin is important. The relaxation of transverse momentum conservation allows first order processes and their inverses: one-photon pair production and annihilation, synchrotron/cyclotron radiation and absorption, which are kinematically forbidden under field-free conditions. The second-order processes: two-photon pair production and annihilation and Compton scattering, are also modified in strong fields. The discreteness of e+-e- pair states causes resonant behavior in the cross sections and decreases the second-order rates from their free-space values. These processes play an important role in modelling high energy emission from pulsars and gamma-ray bursts.
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