Spectral Line Shapes of He I Line 3889 Å

Omar, Banaz; González, Manuel Á.; Ma, Guojun; Рамазанов, Т. С.; Jelbuldina, Madina C.; Dzhumagulova, K. N.; Zammit, Mark C.; Fursa, Dmitry V.; Bray, Igor

doi:10.3390/atoms2020277

Cited by 9 publications

(5 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to [15], in the region n e >10 23 m −3 there is only one experimental result [16] and a few theoretical predictions for the FWHM of the He I 388.86 nm line. All the results are reasonably consistent.…”

Section: Electron Density Estimation Relying On He Diagnostic Linesmentioning

confidence: 99%

“…The FWHM of the He I 388.86 nm line in our experiment is estimated to be w=(0.44±0.04) nm and, according to [16], the corresponding electron density is n e ≈1.5×10 23 m −3 which is in good agreement with the results obtained from Saha-Boltzmann plot. Relying on the Born approximation [15], it follows that the same FWHM of 0.44 nm corresponds to the electron density of n e ≈1.77×10 23 m −3 . The electron density is also estimated relying on the peak separation of the He I 447.15 nm line [17,18].…”

Section: Electron Density Estimation Relying On He Diagnostic Linesmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Stark widths of Mo I and Mo II spectral lines in visible region

Dojić

Skočić

Bukvić

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

In the last decade, molybdenum became a very important element for understanding the process of nucleosynthesis. An essential requirement for stellar spectral analysis is the availability of high-quality atomic data, including Stark broadening parameters. In this work we investigate Stark broadening of molybdenum spectral lines from the wavelength range 370 nm–510 nm. This is the first presentation of Stark widths for 18 Mo I and 18 Mo II spectral lines measured at an electron density of ≈ 1.5 × 1023 m−3 and electron temperature of ≈ 13000 K. Laser induced plasma with well isolated molybdenum spectral lines is employed as a radiation source. Spectra are recorded side-on; the line profiles are obtained via inverse Abel transform. Electron temperature is estimated using the Saha–Boltzmann method. To estimate electron density we applied two techniques. The first is based on the Saha–Boltzmann method for selected Mo I and Mo II spectral lines. In the second approach we rely on the measured width of the well-researched He I 388.86 nm line, as well as on the peak separation of the He I 447.15 nm line. Stark widths normalized to 1 × 1023 m−3 electron density are also given. The possible influence of isotope shift and hyperfine structure on spectral line profiles is discussed in detail. Stark shifts of investigated Mo I and Mo II spectral lines, if they exist, are below the detection limit of the experimental setup.

show abstract

Section: Electron Density Estimation Relying On He Diagnostic Linesmentioning

confidence: 99%

Section: Electron Density Estimation Relying On He Diagnostic Linesmentioning

confidence: 99%

Experimental Stark widths of Mo I and Mo II spectral lines in visible region

Dojić

Skočić

Bukvić

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…Also broadening of He I 492.2 nm line has been investigated theoretically by computer simulation (Lara et al 2012), and with its forbidden components experimentally (Ivković et al 2013). New Stark broadening parameters have been calculated for the allowed 447.1 nm line and its forbidden component at 447.0 nm (Faye et al 2011), as well as for the 388.9 nm line (Omar et al 2014).…”

Section: Transitions In Hydrogenic and Helium-like Systemsmentioning

confidence: 99%

Division B Commission 14 Working Group: Collision Processes

Peach¹,

Dimitrijević²,

Barklem³

2015

Proc. IAU

View full text Add to dashboard Cite

Since our last report (Peach & Dimitrijević 2012), a large number of new publications on the results of research in atomic and molecular collision processes and spectral line broadening have been published. Due to the limited space available, we have only included work of importance for astrophysics. Additional relevant papers, not included in this report, can be found in the databases at the web addresses provided in Section 6. Elastic and inelastic collisions between electrons, atoms, ions, and molecules are included, as well as charge transfer in collisions between heavy particles which can be very important.

show abstract

“…Dimitrijević and Sahal-Bréchot [11] show and discuss numerous examples of such studies, where the SCP approach [8] was used. In the article of Omar et al [12], the authors use a few theoretical methods and computer simulations to calculate the shapes of a He I line and compare them to experimental line profiles, allowing inference of the plasma parameters. Lisitsa et al [13] introduce a new method able to describe penetration of a neutral atomic beam into low-density inhomogeneous fusion plasmas, and provide sample calculations suitable for ITER diagnostics.…”

Section: Applicationsmentioning

confidence: 99%

Special Issue on Spectral Line Shapes in Plasmas

Stambulchik

Calisti

Chung

et al. 2014

Atoms

Self Cite

View full text Add to dashboard Cite

Line-shape analysis is one of the most important tools for diagnostics of both laboratory and space plasmas. Its reliable implementation requires sufficiently accurate calculations, which imply the use of analytic methods and computer codes of varying complexity, and, necessarily, varying limits of applicability and accuracy. However, studies comparing different computational and analytic methods are almost non-existent. The Spectral Line Shapes in Plasma (SLSP) code comparison workshop series [1] was established to fill this gap.Numerous computational cases considered in the two workshops organized to date (in April 2012 and August 2013 in Vienna, Austria) not only serve the purpose of code comparison, but also have applications in research of magnetic fusion, astrophysical, laser-produced plasmas, and so on. Therefore, although the first workshop was briefly reviewed elsewhere [2], and will likely be followed by a review of the second one, it was unanimously decided by the participants that a volume devoted to results of the workshops was desired. It is the main purpose of this special issue. Hydrogen-Like TransitionsMany calculation cases suggested for the first two SLSP workshops are for simple atomic systems: the hydrogen atom or hydrogen-like one-electron ions. Of these, the Ly-α transition is truly the

show abstract

Spectral Line Shapes of He I Line 3889 Å

Cited by 9 publications

References 67 publications

Experimental Stark widths of Mo I and Mo II spectral lines in visible region

Experimental Stark widths of Mo I and Mo II spectral lines in visible region

Division B Commission 14 Working Group: Collision Processes

Special Issue on Spectral Line Shapes in Plasmas

Contact Info

Product

Resources

About