Uzhhorod National University

About: Uzhhorod National University is a education organization based out in Uzhhorod, Ukraine. It is known for research contribution in the topics: Raman spectroscopy & Laser. The organization has 1089 authors who have published 1056 publications receiving 5187 citations. The organization is also known as: State Higher Education Establishment "Uzhhorod National University" & Uzhhorod State University.

A Weighted Sturm–Liouville Problem Related to Ocean Flows

Abstract: We discuss some existence and uniqueness results for the solutions to a two-point boundary-value problem that models the flow of the Antarctic Circumpolar Current in rotating spherical coordinates.

Polarization-dependent laser-induced giant mass transport in glassy semiconductors

Abstract: Direct experimental evidence of the validity of the two-phase model of chalcogenide glass has been obtained. It has been shown that the polarization-light irradiation of glassy semiconductor films induces giant mass transport in the direction perpendicular to the polarization of the incident light. It has been revealed that a surface relief appears in the irradiated films. The shape of the relief depends on the laser polarization state. A macroscopic model qualitatively describing the observed phenomenon is presented.

Coaxial HgI excimer lamps

Abstract: The emission of coaxial HgI excimer lamps pumped by a repetitively pulsed barrier discharge is experimentally studied. The stable operation of the excimer lamps was demonstrated at pump-pulse repetition rates from 0.5 to 12 kHz, and the average emission power attained of 0.6 W at 444 nm. It was found that upon an addition of 0.8% of xenon to the mixture of helium and mercury diiodide, the pulse and average emission powers increased by 30%. The emission power reduced by 5% after 2.5 × 106 pulses. An interpretation of the results of optimising the excimer lamp characteristics is given.

New evidence of light-induced structural changes detected in As-S glasses by photon energy dependent Raman spectroscopy

Abstract: Light-induced structural changes of g-As 40 S 60 and g-As 45 S 55 were probed by macro FT-Raman and photon-energy dependent micro-Raman spectroscopy. We hypothesize that some new observed features in the Raman spectra of these glasses are related to transformations of As 4 S 4 molecules possible through the m-As 4 S 4 intermediate. At the same time, other processes, connected mainly with the layers, composed of pyramidal AsS 3 structural units, take place. These new observed Raman modes and their possible interconnection to changes of the glassy structure are discussed.