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  • Study Data From V.V. Parazian And Co-Authors Update Knowledge Of Con

    STUDY DATA FROM V.V. PARAZIAN AND CO-AUTHORS UPDATE KNOWLEDGE OF CONDENSED MATTER

    Science Letter
    May 19, 2009

    "We investigate the angular distribution of positrons in the coherent
    process electron-positron pair creation process by high-energy photons
    in a periodically deformed single crystal with a complex base,"
    researchers in Yerevan, Armenia report (see also Condensed Matter).

    "The formula for the corresponding differential cross section is
    derived for an arbitrary deformation field. The case is considered
    in detail when the photon enters into the crystal at small angles
    with respect to a crystallographic axis," wrote V.V. Parazian and
    colleagues.

    The researchers concluded: "The results of the numerical calculations
    are presented for SiO2 and diamond single crystals and Moliere
    parameterization of the screened atomic potentials in the case of
    the deformation field generated by an acoustic wave of S-type."

    Parazian and colleagues published their study in the Journal of
    Physics - Condensed Matter (Angular distribution of positrons in
    coherent pair production in deformed crystals. Journal of Physics -
    Condensed Matter, 2009;21(18):85401).

    For additional information, contact V.V. Parazian, Institute Applied
    Problems Physics, 25 Nersessian St., Yerevan 0014, Armenia.

    Publisher contact information for the Journal of Physics - Condensed
    Matter is: IOP Publishing Ltd., Dirac House, Temple Back, Bristol
    BS1 6BE, England.
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