  The probability of emission of photons in non-dipole case by channeled
particle is calculated. The emission of hard photons with an energy comparable
to the energy of the incident channeled particle is examined. The calculation
of the quasi-Bloch energy spectrum of the oriented fast charged particle
entering the crystal at an angle substantially greater than the Lindhard angle
is performed. The initial and final spectra of the channeled particle belonging
to a different set of band wave functions corresponding to different energies
are used. The processes of the photon generation by the quantum
crystal-oriented particle entering into the crystal at an angle both greater
and smaller than the Lindhard angle are considered on the equal footing. It is
shown that the spectrum of hard photon emission consists of a set of the
well-observed emission lines. The probability of the nondipole photon radiation
by the channeled particle with the energy within a small solid angle oriented
along the propagation direction of the channeling particle is shown to be equal
to It has been shown that the nondipole processes of the radiation of hard
photons by the channeled particles are well observed experimentally.
