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Petrovic Jelena Savovic Jelena Rankovic Dragan Kuzmanovic Miroslav 《Plasma Chemistry and Plasma Processing》2022,42(3):519-533
Plasma Chemistry and Plasma Processing - This work presents a study of the applicability of laser-induced breakdown spectroscopy based on infrared transversally excited atmospheric CO2 pulsed laser... 相似文献
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A Power Interruption Technique for Investigation of Temperature Difference in Stabilized Low Direct-Current Arc Burning in Pure Argon on Atmospheric Pressure
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M. M. Kuzmanovic J. J. Savovic D. P. Rankovic M. Stoiljkovic A. Antic Jovanovic M.S. Pavlovic M. Marinkovic 《中国物理快报》2008,25(4):1376-1379
Plasma of argon stabilized arc column, in a current range 3-11 A, is investigated using emission spectrometric diagnostic techniques. Temperatures are evaluated using several methods: argon line to adjacent recombinational continuum intensity ratio, absolute emissivity of argon line, measurement of electron number density, and power interruption. Electron number density is evaluated from absolute emissivity of recombinational continuum. The difference between electron Te and heavy particle Th temperature ranged from 4500 K for 3 A to 2300 K for 11A arc current. By comparing the present with the previously obtained results, using the same arc device but with the introduction of water aerosol, it is concluded that water aerosol reduces the difference Te - Th and brings plasma closer to the partial thermodynamic equilibrium state. 相似文献
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Franck--Condon factors and r-Centroids for the A 1∑+u-X1∑+g Band System of 107,109Ag2: Comparison of the Observed and Calculated Absorption Band Strengths
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A.Antic-Jovanovic M.Kuzmanovic V.Bojovic Murtadha A.Khakoo Russ R.Laher 《中国物理快报》2007,24(9):2566-2568
Franck-Condon factors and r-centrolds for the, A^1 ∑^+ u-X^1∑^+ 9 band system of ^107,109Ag2 are computed using Morse and Rydberg-Klein-Rees potentials for both lower and upper electronic states. The differences between the two sets of results are typically in the third decimal place for transitions involving vibrational levels with ν' and ν" up to about 15. Somewhat larger deviations appear for higher vibrational levels, but both sets of results follow the same pattern, which is to match well with the relative absorption band strength distribution in our experimental spectrum. The relative absorption band strengths are calculated by assuming that the electronic transition moment has only a weak dependence on the internuclear distance r. Good agreement between our measured and calculated absorption band strength ratios is found, which provides an excellent test of the calculated Franck- Condon factors and relative absorption band strengths. The r-centrold value for the (ν' = 0, ν" = 0) band is found to be approximately equal to the average value of r' and r''e , indicating that the potentials of both states are not significantly aaharmonic around their minimum regions. 相似文献
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Milan S. Kovacevic Ljubica Kuzmanovic Alexandar Djordjevich 《Optical and Quantum Electronics》2018,50(5):217
In this paper the effect of photonic crystal fiber’s structure parameters on Rayleigh scattering was investigated. Rayleigh scattering loss (RSL) has been numerically estimated by average Rayleigh scattering coefficient based on the empirical relations for \(V\) and \(W\) parameters of double-clad photonic crystal fibers (DC PCFs). The dependence of RSL on the two structural parameters—the air hole diameter and the hole pitch was demonstrated. We have shown that RSL depends on the index profiles because of the different optical power confinement factors in every layer of DC PCF. Using these results, the RSL can be optimized by adjusting the fiber parameters—air-hole diameter as well as the air-hole pitch. 相似文献
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Bernd Reisinger Natascha Kuzmanovic Patrick Löffler Prof. Dr. Rainer Merkl Prof. Dr. Burkhard König Prof. Dr. Reinhard Sterner 《Angewandte Chemie (International ed. in English)》2014,53(2):595-598
The activity of the metabolic branch‐point enzyme PriA from Mycobacterium tuberculosis (mtPriA) can be controlled reversibly by light. Two‐pronged inhibitors based on the dithienylethene scaffold were designed utilizing mtPriA’s natural rotational symmetry. Switching from the flexible, ring‐open to the rigid, ring‐closed isomer reduces inhibition activity by one order of magnitude. 相似文献
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J. J. Savovic M. M. Kuzmanovic M. S. Pavlovic M. Stoiljkovic M. D. Momcilovic 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2008,50(3):289-296
Spatial distribution of delayed responses of argon and hydrogen spectral line and continuum intensity to square power modulation
was investigated in order to get better insight into the processes occurring in argon dc arc plasma. The power was abruptly
changed between stationary values, 9 and 3.5 A. For these currents steady state radial distributions of electron number density,
temperature and emission intensity were measured. On part of the discharge radial profiles the power drop and the power jump
are both accompanied by intensity peaks which may be explained by displacement of the arc core axis and change in the arc
core diameter during the power modulation. 相似文献
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Momcilovic Milos Zivkovic Sanja Kuzmanovic Miroslav Ciganovic Jovan Rankovic Dragan Trtica Milan Savovic Jelena 《Plasma Chemistry and Plasma Processing》2019,39(4):985-1000
Plasma Chemistry and Plasma Processing - Time-integrated optical emission spectroscopy was applied for the analysis of emission spectra, and determination of electron densities and excitation... 相似文献
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