On the Growth of Thin-Film AlGaN/GaN Epitaxial Heterostructures on Hybrid Substrates Containing Layers of Silicon Carbide and Porous Silicon

Semiconductors - Abstract—In our work, we carry out a structural-spectroscopic study of AlGaN/GaN epitaxial layers grown by molecular-beam epitaxy with nitrogen-plasma activation on a hybrid...     

Use of TlBr crystals for x- and γ-ray detectors

The development and investigations of uncooled semiconductor x- and γ-ray detectors based on thallium bromide crystals grown by the Bridgman–Stockbarger method are reported. The procedure for preparing Me–TlBr–Me (Me = Au, In) detector structures is described, and the current–voltage characteristics are investigated. The counting and spectrometric characteristics of the detectors fabricated have been measured. The best energy resolution was 0.54, 1.3, 1.41, 2.1, and 7.1 keV at energy 5.8 (⁵⁵Fe), 22.1 (¹⁰⁹Cd), 59.6 (²⁴¹Am), 122 (⁵⁷Co), and 662 keV (¹³⁷Cs), respectively. Translated from Atomnaya énergiya,Vol. 106, No. 4, pp. 214–217, April, 2009.     

Slowing down of fission neutrons by water

In this articie we describe the method and results of measurement offor U²³⁵ fission neutrons slowed down by water to energies of 1.46 ev. The value obtained for _{1.46 ev} = 294 ± 1.5 cm² In conclusion, the authors express their sincere gratitude to I. I. Gurevich and D. V. Timoshuk for reviewing the results, to A. P. Venediktov for help in the work, and to G. R. Golbek for lending the -apparatus with low background.     

Complex investigation of the fluctuating thermohydrodynamic characteristics of a marine medium

Methods of measuring the fluctuating characteristics of seawater are described. Certain results obtained by using these methods are presented.Research performed jointly with the Far East Scientific-Research Hydrometeorological Institute as part of a complex investigation of the pulsating characteristics of a marine medium by using acoustic, optical, and thermocontact methods developed in the A. V. Lykov Institute of Heat and Mass Transfer of the Belorussian Academy of Sciences.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 37, No. 4, pp. 692–698, October, 1979.