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The collisional broadening and shift of four spectral lines of neon (747.2, 748.8, 753.5, 754.4 nm) arising from 2p5 3p - 2p5 3d transitions, emitted from a low-pressure glow discharge in pure neon and neon-helium mixtures have been measured using a Fabry-Perot interferometer. The values of pressure broadening and shift coefficients are determined and analyzed in terms of the impact theory. 相似文献
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The quadratic Stark constants for the five lowest energy levels of Cu I have been estimated using a semiempirical method. 相似文献
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P.?Mas?owski K.?Bielska A.?Cygan J.?Domys?awska D.?Lisak R.?Ciury?o A.?Bielski R. S.?Trawiński 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2009,51(3):295-302
Careful analysis of the intercombination 51S0–53P1 line of the 113Cd isotope with two hfs components
and was carried out.
The hyperfine splitting of this line was determined to uncertainty less than
10-3 cm-1 using neon-perturbed Doppler limited spectra. 相似文献
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R. Bielski J. M. J. Frchet J. V. Fusco K. W. Powers H. C. Wang 《Journal of polymer science. Part A, Polymer chemistry》1993,31(3):755-762
The crosslinking chemistry of a new elastomer based on brominated poly(isobutylene-co-4-methylstyrene) has been investigated using model compounds. In order to mimic the conditions that prevail within the highly allphatic rubber, the study was carried out in mineral oil using catalysts that are compatible with such low polarity media. Electrophilic aromatic substitution reactions occur in a system consisting of p-isopropylbenzyl bromide and p-isopropyl toluene in the presence of zinc oxide and zinc stearate. The reaction proceeds after a significant induction period while no induction period is seen for a similar reaction with zinc bromide as the catalyst. The in situ formation of reactive species containing Zn? Br bonds appears to be an important step in the overall process. The stoichiometric ratio of zinc salt to benzylic bromide is important. High ratios lead to the accumulation of benzylic stearate or benzylic alcohol in the system which retards the alkylation reaction. The model study emphasizes the importance of stoichiometry of reagents in this reaction and provides insight into the crosslinking mechanism. © 1993 John Wiley & Sons, Inc. 相似文献
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A. Bielski D. Lisak R.S. Trawiński J. Szudy 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2003,23(2):217-222
Using a laser-induced fluorescence method a detailed analysis of profiles of the 114Cd 326.1 nm line perturbed by N2 and CH4 was performed which revealed deviations from the ordinary Voigt profile. These deviations are shown to be consistent with
fits of experimental profiles to an asymmetric Voigt profile. Coefficients of the pressure broadening, shift and collision-time
asymmetry are determined and compared with those calculated for van der Waals interaction potential.
Received 29 November 2001 / Received in final form 12 July 2002 Published online 4 February 2003 相似文献
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A simple method for separation of two overlapping spectral lines with the same intensity distribution is given. The method covers the case of spectrometers with periodical instrumental functions and gives explicit formulae for the intensity distribution of the components in selected points. 相似文献
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A. Bielski 《Journal of Quantitative Spectroscopy & Radiative Transfer》1975,15(6):463-472
A critical survey of experimentally-determined atomic transition probabilities for 102 spectral lines of CuI has been carried out. Many of the values have been brought up to date and renormalized on the basis of recent measurements. 相似文献
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A. Bielski K. Bryl W. Dokurno E. Lisicki 《Zeitschrift für Physik A Hadrons and Nuclei》1981,303(1):1-5
Natural radiative lifetimes in the perturbed 6s n s 1 D 2 (n=12?30) sequence of barium have been measured using the PUMOLS (PUlse-MOdulated Laser Spectroscopy) method, which incorporates pulse-modulation of a CW dye-laser beam and delayed coincidence techniques. Principal perturbers are the 5d 7d 3 F 2 and1 D 2 states. Lifetimes were also measured for these shortlived valence states, which through configuration mixing cause drastic decreases in lifetime values in the region of perturbation of the 6s n d 1 D 2 sequence. Two-step laser excitation from the ground 6s 2 1 S 0 state via the 6s 6p 1 P 1 state was employed. Special care was taken to determine the influence of black-body radiation transitions on the measured lifetimes. 相似文献