[en] Short note. 2 refs.; 1 fig

No abstract available

[en] Short communication. 2 refs

[en] The results of the calibration of γ spectrometer on the base of the scintillating 150x275 mm CsJ(Tl) crystal in the γ-quanta energy range from 1 to 1200 MeV are presented. At energies up to 10 MeV the calibration has been carried out by collimated beam of γ quanta from resonance ²⁷Al(p, γ) ²⁸Si reaction at proton energy of 992 keV. Single electrons of 2 GeV linear accelerator with energy spread ΔE/E approximately 0.5% were used for calibration at energies o >150 MeV. To separate unitial electrons moving along the spectrometer axis, measurements were carried out in the regime of coincidence of the signals of the spectrometer and aperture counter coaxial with the spectrometer with 15 mm diameter plastic scintillator. It is shown, that the energy resolution of the spectrometer in the shown energy range of γ quanta changes within the limits of 10x5.6%

No abstract available

[en] The spectral density is measured of 1035 MeV positrons radiation in a diamond monocrystal in the gamma-quanta energy range, where frequencies caused by phonon conversion are manifested. Coincidence of the observed maxima position in spectral densities of positron radiation with the predictions of the theory of phonon conversion on relativistic charged particles is shown

[en] X radiation of relativistic electrons in crystals can be caused by different radiation mechanisms such as parametric Cherenkov radiation, coherent and non-coherent bremstrahlung, and characteristic radiation. The radiation mechanism can be identified by measuring radiation intensity angular distributions. An experimental facility, consisting of a goniometer with remote control systems for electron beam shaping and parameter control at a monocrystal target, radiation extraction channels, and a matrix detector, consisting in its turn of 4096 thin-wall ionization chambers operating on-line with the Elektronika-60 microcomputer, is designed at the LU-40 40 MeV electron linear accelerator to reach the aim

No abstract available

[en] The following electromagnetic interactions of electrons and positrons with monocrystals are considered: scattering and channeling; coherent Bremsstrahlung; radiation of channeled particles in different energy ranges; formation of secondary electrons in monocrystals; ionization energy losses and nuclear reactions. The most part of these experiments were made with electron accelerator LUEh-2 GeV in KhFTI. 60 refs., 7 tab., 60 figs

[en] Short communication. 1 refs