Ion contribution to the astrophysical important 388.86, 471.32 and 501.56 nm He I spectral lines broadening

Milosavljević, Vladimir; Djeniže, S.

doi:10.1016/s1384-1076(02)00177-x

Cited by 22 publications

(34 citation statements)

References 31 publications

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“…From the observed profiles, using a deconvolution procedure, ion static and dynamic broadening parameters were estimated. However, in this case, dynamical ion contributions play no role [31]. The comparison of our results, the experimental data, the theoretical values of Griem [51,52], BCW [49], and DSB [81] reported by the same Ref.…”

Section: Resultssupporting

confidence: 74%

“…The comparison of our results, the experimental data, the theoretical values of Griem [51,52], BCW [49], and DSB [81] reported by the same Ref. [31] are presented in Fig. 17.…”

Section: Resultsmentioning

confidence: 59%

“…For the same transition, spectral line profiles have been measured by Milosavljević and Djeniže [31] temperature range of (18 − 33) × 10 3 K and electron density between (4.4 − 8.2) × 10 22 m −3 . From the observed profiles, using a deconvolution procedure, ion static and dynamic broadening parameters were estimated.…”

Section: Resultsmentioning

confidence: 90%

“…In Fig. 13, additional data for a larger range of densities are shown: i) values obtained by Pérez et al [3] for densities from (2.0 − 6.46) × 10 22 m −3 and temperatures between (1.9 − 4.3) × 10 4 K, ii) experimental values by Mijatović et al [27] and Kelleher [30], iii) measurement by Milosavljević and Djenize [31] was performed at electron densities between (0.3 − 8.2) × 10 22 m −3 and electron temperatures of (8−3.3)×10 4 K in five different plasma discharge conditions using a linear, low-pressure, pulsed arc as an optically thin plasma source, operated in a helium-nitrogen-oxygen gas mixture. Comparison with the theoretical results by Bassalo et al [76] are given as well.…”

Section: Resultsmentioning

confidence: 99%

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Neutral helium spectral lines in dense plasmas

et al. 2006

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Shift and broadening of isolated neutral helium lines 7281Å (2 1 P − 3 1 S), 7065Å (2 3 P − 3 3 S), 6678Å (2 1 P − 3 1 D), 5048Å (2 1 P − 4 1 S), 4922Å (2 1 P − 4 1 D) and 4713Å (2 3 P − 4 3 S) in a dense plasma are investigated. Based on a quantum statistical theory the electronic contributions to the shift and width are considered, using the method of thermodynamic Green functions. Dynamic screening of the electron-atom interaction is included. Compared to the width, the electronic shift is more affected by dynamical screening. This effect is increasing at high density. A cut-off procedure for strong collisions is used. The contribution of the ions is taken into account in a quasi-static approximation, with both the quadratic Stark effect and the quadrupole interaction included. The results for shift and width agree well with the available experimental and theoretical data.

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Section: Resultssupporting

confidence: 74%

“…The comparison of our results, the experimental data, the theoretical values of Griem [51,52], BCW [49], and DSB [81] reported by the same Ref. [31] are presented in Fig. 17.…”

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

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Neutral helium spectral lines in dense plasmas

et al. 2006

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“…The other two broadening mechanisms are negligible (see Table 5). From this analysis we A135, page 8 of 13 He I 3889 He I 7065 (b) Wulff 1958Berg et al 1962Bötticher et al 1963Lincke 1964Greig & Jones 1970Morris and Cooper 1973Einfeld & Sauerbrey 1975Chiang et al 1977Soltwisch & Kusch 1979Kelleher 1981Pérez et al 1991Mijatović et al 1995Djeniže 1995Milosavljević & Djeniže 2002b Griem 1974 (at T = 20000K) Bassalo et al 1982Sahal-Bréchot et al 2013 This …”

Section: Resultsmentioning

confidence: 97%

Stark broadening of lines from transition between statesn = 3 ton = 2 in neutral helium

Djurović

Savić

et al. 2014

A&A

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Context. The Stark broadening of the spectral lines of the wavelengths 501. 6, 667.8, 728.1, 388.9, 587.6, and 706.5 nm from neutral helium in plasmas are studied theoretically and experimentally. Aims. The aim of this work is to provide information about the connection between the shape and width of spectral lines and the electron density and temperature to be used as a diagnostic tool. Methods. The theoretical calculations were carried out through molecular dynamics computer simulations with noninteracting particles. The experimental measurements were done in a plasma of pure helium generated in an electromagnetically driven T-tube. The plasma diagnostics used previous results about the Stark broadening of the He I 447.1 nm and He I 492.2 nm lines and the coherence between the shape of these spectra and those obtained here. The electron temperature was obtained through a Boltzmann-plot of eight lines of Si II. Results. Several tables of width and shift are provided in a wide range of electron density and temperature. Furthermore, we supply several fitting formulas, which allow calculating the plasma electron density from the measured values of the spectral line widths. The results obtained in the laboratory and in the simulations are compared with the data from the literature.

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Experimental and theoretical investigations of the Stark width and shift of the He I 388.865 nm spectral line

Bacławski,

Bartecka

2024

Journal of Quantitative Spectroscopy and Radiative Transfer

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Ion contribution to the astrophysical important 388.86, 471.32 and 501.56 nm He I spectral lines broadening

Cited by 22 publications

References 31 publications

Neutral helium spectral lines in dense plasmas

Neutral helium spectral lines in dense plasmas

Stark broadening of lines from transition between statesn = 3 ton = 2 in neutral helium

Experimental and theoretical investigations of the Stark width and shift of the He I 388.865 nm spectral line

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