A spectrometer of polarized neutrons

A polarized neutron spectrometer intended for studies of interactions of nuclei and condensed matter with polarized neutrons with energies in the range from thermal energies to several electron volts was designed at the IBR-2 pulsed reactor (JINR, Dubna). Diffraction on magnetized Co(92%)–Fe(8%) single crystals was used to polarize neutrons and analyze the polarization. The attained neutron polarization was ∼95% within the entire energy range.     

The temperature dependence of the resistivity of ohmic contacts based on gallium arsenide and indium phosphide in the 4.2–300 K range

Technical Physics Letters - Resistivity ρc of InP- and GaAs-based ohmic contacts has been measured in a temperature range of 4.2–300 K. Both temperature dependences are nonmonotonic and...     

Analysis of Temperature Measurement Errors Due to the Inaccuracy of the Model of a Computer-Aided Measuring Transducer

The series of models of temperature sensors described are based on the concept of measuring computer-aided transducers, according to which measuring and computer-aided transducers are considered as a single device.     

An Ion-Beam Apparatus for the Surface Planarization of Oxide Materials

The ion-beam apparatus described contains two identical wide-aperture sources of oxygen ions with cold hollow cathodes. One of them serves for depositing a thin layer of the target material on the heated surface of the treated sample by the ion sputtering technique (the target is made of the same material as the sample or a material with similar properties). The second source is used to sputter the obtained structure. The apparatus makes it possible to planarize surfaces of oxide materials by successively filling depressions with a layer of the target material and then sputtering this structure over a depth slightly exceeding the depth of the deposited layer. The deposition–sputtering cycles are repeated with a gradual decrease in the deposited layer thickness.     

The effect of matched pairs of thermometers on the error in determining thermal energy using a commercial metering unit

The effect of individual and matched pairs of resistance thermometers on the error in determining thermal energy by a metering unit is estimated. Criteria for selecting domestic mass-produced matched pairs of resistance thermometers are given and the existing approach to producing matched pairs is analyzed. Metrological requirements, rules, and a program for selecting matched pairs based on a new criterion are formulated. Translated from Izmeritel'naya Tekhnika, No. 11, pp. 32–36, November, 1999.     

Anodic protection of chemical-production equipment

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 10, pp. 24–27, October, 1991.     

Modification of the shape of large germanium nanoislands on silicon surface by low-energy ion bombardment

Germanium nanoislands on silicon substrates were irradiated by hydrogen and argon ions with energies below 350 eV. In the initial stage, ion bombardment leads to the division of large islands into several small islands irrespective of the ion type. The resulting surface is more homogeneous than the initial and is stable with respect to further ion irradiation.