On the Seventieth Birthday of Yu.V. Pleskov

Russian Journal of Electrochemistry -     

On the Seventieth Birthday of J. Japaridze

Russian Journal of Electrochemistry -     

Measurement of the spin and temperature dependence of ddµ molecule formation rate in solid and liquid deuterium

The ddµ molecule formation rate is experimentally measured for the two hyperfine states of the dµ-atom in the temperature range of 5–30 K. Results are consistent with a preliminary measurement by the TRIUMF group and contradict theoretical predictions. The work has been performed on the JINR phasotron (Dubna).     

Analyzing electrochemical noise with Chebyshev’s discrete polynomials

The principles underlying a novel method intended for analyzing experimental data obtained when studying fluctuation processes are considered. The method in question is Chebyshev’s spectroscopy. The application of this method allows one to determine statistic characteristics of steady-state electrochemical noise against the background of severe deterministic interference without invoking the procedure of the fitting of the initial data. The potentialities of this novel method, which is intended for treating noise experiment, are demonstrated by examining model examples and analyzing the electrochemical noise generated by a lithium electrode placed in an aprotic organic electrolyte.     

On the theory of mixed electrochemical fluctuations

Mixed correlators of 2^nd order with respect to fluctuations of the electrode free charge, full charge, and potential are analyzed on the basis of classical theory of noise and fluctuations. It is shown that the mixed correlator of free and full charge fluctuations is determined by the electrochemical cell temperature and the electrical capacitance corresponding to the electrode free charge. At the same time, the mixed correlator of the electrode full charge and potential fluctuations equals the product of the Boltzmann constant and temperature. The former result corresponds to both the Gibbs fluctuation theory and the Einstein-Landau theory of the extensive quantities’ mixed correlators. The latter one corresponds to the Einstein-Landau theory for the paired mixed correlators of conjugated (extensive and intensive) quantities. The results obtained evidence that, unlike the 3rd order correlators, the ergodic hypothesis with respect to the 2^nd order correlators works well even in rather complicated electrochemical systems.     

On the 75th Birthday of Yu.M. Polukarov

Russian Journal of Electrochemistry -