V.В. Gostev, V.S. Mineev, A.R. Frenkin

Potentials leading to an equidistant spectrum are investigated by the method of the inverse spectral problem. Using a reference potential in the form of a harmonic oscillator with a centrifugal barrier , a class of potentials with equidistant energy levels coinciding with those of the reference potential is found. New eigenfunctions are found . Asymptotic expressions are given for the potential and the wave functions. The case in which an additional level is switched on is investigated. This method of recovering the potential may also be used in the case of arbitrarily positioned energy levels.

V.V. Ostroborodova, L.G. Radovil'sкауa

At room temperature , the laws of photosensitivity (PS) change of GaAs (Cr) crystals by spectral and integral bias lighting are investigated. Nonreproducibility of the spectral photoresponse i$_M$ at the intrinsic-PS maximum is found. Since the time relaxation p$_T$(t), μ$_nT$(t) after illumination in the region of the impurity quenching effect (QE) occurs in a matter of days , it may be concluded that deep donors play an important role in the formation of GaAs (Cr) PS and also that compensational inhomogeneity associated with strong filling of the working levels by electrons is present in n samples. It is shown that stimulation effects may be due to liquidation of the inhomogeneity by the illumination, even such as to cause QE by predominant hole generation at larger I.

V.P. Kandidov and V.I. Ledenev

The article sets forth a technique and discusses a practical computer simulation of the random permittivity field of a turbulent atmosphere based on a sliding summation algorithm. Criteria are introduced for estimating the precision of simulated one-dimensional and two-dimensional fields with specified statistical characteristics.

V.Ya. Panchenko, I.M. Sizova, and A.P. Sukhorukov

К.V. Shaitan

S.D. Antipov, L.A. Kondrashova, and P.N. Stetsenko

A.A. Karabutov

V.I. Shestakov

G.S. Asanov

V.I. Balakshii