Results 1 to 10 of about 791,178 (129)
Atoms, 2018 There is presented an overview of the latest advances in the analytical theory of Stark broadening of hydrogenic spectral lines in various types of laboratory and astrophysical plasmas.
Eugene Oks
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Correcting the Input Data for Calculating the Asymmetry of Hydrogenic Spectral Lines in Plasmas
Atoms, 2018 We provide corrections to the data in Sholin’s tables from his paper in Optics and Spectroscopy 26 (1969) 27. Since his data was used numerous times by various authors to calculate the asymmetry of hydrogenic spectral lines in plasmas, our corrections ...
Paul Sanders, Eugene Oks
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MODERNIZATION OF THE KHARKIV MICROWAVE SPECTROMETER: CURRENT STATE [PDF]
Radio Physics and Radio Astronomy, 2023 Subject and Purpose. Results are presented of the recent considerable upgrade implemented at the Kharkiv microwave spectrometer. The upgrade has been aimed at extending the operating frequency range and increasing the utmost accessible spectral ...
E. A. Alekseev +4 more
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On the Stark broadening of Ru III spectral lines [PDF]
Bulletin of Natural Sciences Research, 2021 Stark broadening parameters, full widths at half maximum (FWHM) and shifts for spectral lines within six multiplets of doubly charged ruthenium ions have been calculated, for an electron density of 10 17 cm-3 and temperature range from 10 000 K to 160 ...
Dimitrijevć Milan S.
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SQUARE-WAVE FREQUENCY MODULATION IN MICROWAVE SPECTROSCOPY [PDF]
Radio Physics and Radio Astronomy, 2022 Subject and Purpose. The frequency modulation (FM)combined with lock-in detection, the technique which is used in microwave spectroscopy for enhancing the sensitivity of measurements, as well as the effects due to standing wavesinthe measuring absorption
E. A. Alekseev +2 more
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THE RT-32 RADIO TELESCOPE CONSTRUCTION BASED ON THE MARK-4B ANTENNA SYSTEM. 3. LOCAL OSCILLATORS AND SELF-NOISE OF THE RECEIVING SYSTEM [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: High resolution investigation of spectral lines of space sources requires low intrinsic noise of the radio telescope receiving system. It is provided with both input cryogenic amplifiers and low phase noise of local oscillators. To make spectral
O. M. Ulyanov +25 more
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Update of Atomic Data for the First Three Spectra of Actinium
Atoms, 2022 The present article describes a complete reanalysis of all published data on observed spectral lines and energy levels of the first three spectra of actinium (Ac I–III). In Ac I, three previously determined energy levels have been rejected, 12 new energy
Alexander Kramida
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Eurasian Journal of Physics and Functional Materials, 2021 This paper presents the experimental results on electron, ion temperatures and densities in a pulsed plasma accelerator. The values of electron densities and temperatures were computed using the methods of relative intensities of Hα and Hβ lines, Hβ ...
M. K. Dosbolayev +2 more
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On line spectral frequencies [PDF]
IEEE Signal Processing Letters, 2003 The commonly used line spectral frequencies form the roots of symmetric and antisymmetric polynomials constructed from a linear predictor. We provide a new, simpler proof that the symmetric and antisymmetric polynomials can be regarded as optimal constrained predictors that correspond to predicting from the low-pass and high-pass filtered signal ...
W. Bastiaan Kleijn +2 more
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Project of the Large Solar Telescope with mirror 3 m in diameter
Solar-Terrestrial Physics, 2020 One of the most important problems of modern solar physics is the observation of the small-scale structure of the solar atmosphere at various heights (including the chromosphere and corona) in different spectral lines.
Grigoryev V.M. +5 more
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