Scattering by a potential well in an intense radiation field

Scattering by a spherically symmetric potential well in a laser radiation field is examined in the eikonal approximation. The total scattering cross section is found for radiation of an arbitrary number of photons. The range of values of the Born parameter is obtained for which the influence of the radiation field on the scattering cross sections is significant.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 73–76, April, 1989.     

Thermal parametric turbulence in a plasma

A theory of thermal parametric instability (TPI) in an inhomogeneous magnetoplasma is developed. The threshold pump wave amplitude and increments of TPI are obtained. The spacial spectra of plasma waves and magnetic field aligned density perturbations are determined at the nonlinear stage of TPI, perturbation intensity dependence on pump energy is also analyzed. The theoretical results are applied to explain the ionospheric modification experiments.     

Determination of energies of cosmic-ray nuclei in the region above 1 TeV

A method is proposed for measuring energies of particles in the region above 1 TeV. The method is based on detecting the greatest specific energy deposition in hadronic cascades propagating in dense matter. This makes it possible to improve accuracy in measuring energy by thin calorimeters in studying the energy spectra of high-energy cosmic rays at high altitudes. Attainable accuracies in measuring energy are considered for protons and He nuclei. The results of a relevant simulation are compared with the results of a satellite-borne experiment with Kosmos-1713.     

Synthese in fester Phase. Nachweis und Ausma? von Reaktionen innerhalb des Harzes

Ohne Zusammenfassung