The Polarization of Radiation in Single Cristals in the Quasiclassical Approach

The radiation emission spectra of polarized photons emitted from charged particles in single oriented crystals are obtained in Bayer-Katkov quasiclassical approach. The results of numerical calculations are presented in the region of small angles of incidence for which the coherent theory fails but magnetic bremsstrahlung region isn't yet achieved. The spectral distribution of linear polarization degree repeats, in general, the form of the intensity distribution. At sufficiently small angles, in the case of planar orientation of crystal, there is a wide maximum of essential linear polarization at low frequencies.Comment: Latex with 3 figures (.eps files). used epsfig.sty and wrapfig.st

W-meson pair production in high energy electron collisions

Total cross sections for e± + e– → e± + e– + W+ + W– processes are obtained in the asymptotic region of initial particle energies for cases when the anomalous magnetic moment of the W-meson is zero. The covariant formulation of the Weizsäcker-Williams method, whose validity is ensured by ultrarelativism of the electrons, is employed. The asymptotic behavior of the e+ + e– → W+ + W– + µ+ + µ– cross section is found