Measured Stark widths and shifts of the neutral argon spectral lines in 4s–4p and 4s–4p′ transitions

Milosavljević, Vladimir; Ellingboe, A. R.; Djeniže, S.

doi:10.1016/j.sab.2005.11.004

Cited by 16 publications

(8 citation statements)

References 44 publications

(26 reference statements)

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“…The applied deconvolution procedure is extensively described in the literature (Milosavljević & Poparić 2001; Milosavljević, Djeniže, & Dimitrijević 2003; Milosavljević, Ellingboe & Djeniže 2006). It includes an advanced numerical procedure for deconvolution of the theoretical asymmetric convolution integral of a Gaussian and a plasma‐broadened spectral line profile j A , R (λ).…”

Section: Methodsmentioning

confidence: 99%

Stark shifts and transition probabilities within the Kr I spectrum

Milosavljević¹,

Simić²,

Daniels³

et al. 2012

Monthly Notices of the Royal Astronomical Society

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On the basis of 28 experimentally determined prominent neutral krypton (Kr I) line shapes (in the 5s-5p and 5s-6p transitions), we have obtained electron (d e ) and ion (d i ) contributions to the total Stark shifts (d t ). Stark shifts are also calculated using the semiclassical perturbation formalism (SCPF) for electrons, protons and helium ions as perturbers up to 50 000 K electron temperatures. Transition probabilities of spontaneous emission (Einstein's A k,i values) have been obtained using the relative line-intensity ratio method.The separate electron (d e ) and ion (d i ) contributions to the total Stark shifts are presented, as well as the ion-broadening parameters, which describe the influence of the ion-dynamical effect on the shift of the line shape, for neutral krypton spectral lines. We made a comparison of our measured and calculated d e data and compared both of these with other available experimental and theoretical d e values.

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Section: Methodsmentioning

confidence: 99%

Stark shifts and transition probabilities within the Kr I spectrum

Milosavljević¹,

Simić²,

Daniels³

et al. 2012

Monthly Notices of the Royal Astronomical Society

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“…Methods based on the so-called "six free parameters deconvolution" (SFPD) procedure were developed to determine from experimental data, parameters of given emission lines [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Zn I emission lines observed during a spark discharge in liquid nitrogen for zinc nanosheet synthesis

Belmonte

Kabbara

Noël

et al. 2018

Plasma Sources Sci. Technol.

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High-voltage pulsed discharges of a few milliwatts in liquid nitrogen between two zinc electrodes are investigated by optical emission spectroscopy. The possibility to account by modeling for the time evolution of selected zinc lines that are sufficiently intense gives access to the dynamics of the discharge. The intense background emission at short times (from 50 to 100 ns) is satisfactorily described by Planck's continuum with a temperature of 0.9 eV and an electron density of 10 17 cm −3 . Later on, when zinc lines start appearing in the spectrum, i.e. beyond 300 ns typically when the background emission drops, the electron density and the electron temperature decrease exponentially (from 5.3 to 3.5 eV at 700 ns and from 4×10 16 to 10 15 cm −3 ). The modeling of the time evolution of three selected zinc lines at 468.01, 472.22 and 481.05 nm gives a coherent insight of the discharge behavior and structure, especially in terms of species gradient and optical thickness. It is also used to check the reliability of the extracted data.

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“…This allows one to use the Saha and Boltzmann equations in the analysis of optical emission spectroscopy (OES), for determining plasma density and electron temperature. As these models for calculating the plasma parameters are based on the assumption of LTE, the interpretation of plasma diagnostic data reported in many works, including ours [5][6][7][8][9][10][11][12], can be greatly affected. Additionally, it is well known that in most laboratory plasmas radiative equilibrium is not obtained.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the pulse plasma source

Milosavljević

Karkari

Ellingboe

2007

Plasma Sources Sci. Technol.

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Characterization of the pulse plasma source through the determination of the local thermodynamic equilibrium (LTE) threshold is described. The maximum electron density measured at the peak in discharge current is determined by the width of the He II Paschen alpha spectral line, and the electron temperature is determined from the ratios of the relative intensities of spectral lines emitted from successive ionized stages of atoms. The electron density and temperature maximum values are measured to be 1.3 × 10 17 cm −3 and 19 000 K, respectively. These are typical characteristics for low-pressure, pulsed plasma sources for input energy of 15.8 J at 130 Pa pressure in helium-argon mixture.The use of LTE-based analysis of the emission spectra is justified by measurement of the local plasma electron density at four positions in the discharge tube using a floating hairpin resonance probe. The hairpin resonance probe data are collected during the creation and decay phases of the pulse. From the spatio-temporal profile of the plasma density a 60 µs time-window during which LTE exists throughout the entire plasma source is determined.

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Measured Stark widths and shifts of the neutral argon spectral lines in 4s–4p and 4s–4p′ transitions

Cited by 16 publications

References 44 publications

Stark shifts and transition probabilities within the Kr I spectrum

Stark shifts and transition probabilities within the Kr I spectrum

Analysis of Zn I emission lines observed during a spark discharge in liquid nitrogen for zinc nanosheet synthesis

Characterization of the pulse plasma source

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