27 research outputs found
Observation of the fine structure for rovibronic spectral lines in visible part of emission spectra of
For the first time in visible part of the emission spectrum the pseudo
doublets representing partly resolved fine structure of rovibronic lines have
been observed. They are characterized by splitting values about 0.2 cm
and relative intensity of the doublet components close to 2.0. It is shown that
they are determined by triplet splitting in lower rovibronic levels of various
electronic transitions. It is proposed to use
an existence of such partly resolved fine structure patterns for identification
of numerous unassigned spectral lines of the molecule coming from great
variety of triplet "gerade" electronic states to vibro-rotational levels of the
state.Comment: 6 pages, including 2 figures and 1 table; submitted to Phys.Rev.Let
Optimal values of rovibronic energy levels for triplet electronic states of molecular deuterium
Optimal set of 1050 rovibronic energy levels for 35 triplet electronic states
of has been obtained by means of a statistical analysis of all available
wavenumbers of triplet-triplet rovibronic transitions studied in emission,
absorption, laser and anticrossing spectroscopic experiments of various
authors. We used a new method of the analysis (Lavrov, Ryazanov, JETP Letters,
2005), which does not need any \it a priory \rm assumptions concerning the
molecular structure being based on only two fundamental principles:
Rydberg-Ritz and maximum likelihood. The method provides the opportunity to
obtain the RMS estimates for uncertainties of the experimental wavenumbers
independent from those presented in original papers. 234 from 3822 published
wavenumber values were found to be spurious, while the remaining set of the
data may be divided into 20 subsets (samples) of uniformly precise data having
close to normal distributions of random errors within the samples. New
experimental wavenumber values of 125 questionable lines were obtained in the
present work. Optimal values of the rovibronic levels were obtained from the
experimental data set consisting of 3713 wavenumber values (3588 old and 125
new). The unknown shift between levels of ortho- and para- deuterium was found
by least squares analysis of the , ,
rovibronic levels with odd and even values of . All the energy levels were
obtained relative to the lowest vibro-rotational level (, ) of
the electronic state, and presented in tabular form together
with the standard deviations of the empirical determination. New energy level
values differ significantly from those available in literature.Comment: 46 pages, 9 picture
Effect of molten basic open-hearth slag on the composition of the MgO-MgAl2O4-MgCr2O4 system
Pulse-Current Sources for Plasma Accelerators
The pulse source for plasma-accelerators supply operates under the conditions of nonlinear growth of load inductance, which complicates the matching of the source and the load. This article presents experimental studies of the use of both traditional pulse-energy sources based on capacitive storage and alternative ones based on explosive magnetic generators (EMG). It is shown that the EMG with the special device of the current-pulse formation more effectively matches with such a plasma load as the pulse plasma-accelerator (PPA). This device allows a wide range to manage the current-pulse formation in a variable load and, consequently, to optimize the operation of the power source for the specific plasma load. A mathematical model describing the principle of operation of this device in EMG on inductive load was developed. The key adjustable parameters are the current into the load, the residual inductance of the EMG, and the sample time of the specified inductance and the final current in the load. The device was successfully tested in experiments with the operation on both one and two accelerators connected in parallel. In the experiments, the optimal mode of device operation was found in which the total energy inputted to a pair of accelerators in one pulse reached 0.55 MJ, and the maximum current reached about 3.5 MA. A comparison with the results of experiments performed with capacitive sources of the same level of stored energy is given. The experiments confirmed not only the principal possibility of using EMG with a special device of current-pulse formation for operation with plasma loads in the MJ energy range but also showed the advantages of its application with specific types of plasma load
Influence of raw material factors on fuel consumption during pellet production
Translated from Russian (Stal' 1988 (7) p. 4-7)Available from British Library Document Supply Centre- DSC:9022.06(BISI-Trans--27026)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Influence on technological factors on fuel consumption in pellet production
Translated from Russian (Stal' 1988 (9) p. 8-12)Available from British Library Document Supply Centre- DSC:9022.06(BISI-Trans--27109)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo