Transition probabilities of several transitions in the Ar III and Ar IV spectra

Djeniže, S.; Bukvić, S.

doi:10.1051/0004-6361:20000007

Cited by 51 publications

(46 citation statements)

References 14 publications

(20 reference statements)

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“…The absence of the self-absorption, in the case of the 2 UV and 3 UV multiplets, was proved using the method described by Djeniže & Bukvić (2001). However, in the case of the resonance Mg II h&k lines (in the multiplet 1 UV) presence of the self-absorption was found.…”

Section: Methodsmentioning

confidence: 94%

Mg II spectral line broadening in helium, oxygen and argon-helium plasmas

Djeniže

Bukvić

Srećković

et al. 2004

A&A

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Abstract. Stark widths (W) and shifts (d) of the astrophysically very important six (279.0777, 279.5528, 279.7998, 280.2705, 292.8633 and 293.6510 nm) singly ionized magnesium (Mg II) spectral lines in helium, oxygen and argon-helium plasmas have been measured at electron temperatures between 30 000 and 52 300 K and electron densities between 1.2 × 10 23 and 1.65 × 10 23 m −3 . They are the first experimental results obtained at electron temperatures higher than 20 000 K. A linear, low-pressure, pulsed arc has been used as an optically thin plasma source. The magnesium atoms, as impurities in the driving gases, have been introduced by erosion from the pure magnesium bands fixed on the discharge electrodes. Our measured Stark width and shift values have been compared to the existing experimental and theoretical data. We have found a good agreement with W and d values calculated by the semiclassical perturbation formalism (SCPF).

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Section: Methodsmentioning

confidence: 94%

Mg II spectral line broadening in helium, oxygen and argon-helium plasmas

Djeniže

Bukvić

Srećković

et al. 2004

A&A

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“…In [2] we used the values published in [31] which have a rather large error of about 50%. However, meanwhile [29] published exactly the same A values with a smaller uncertainty of 10%, so that this can be ruled out as a reason for the differences in temperature, too. Therefore, our warning from [2] not to over-interpret the results is still valid.…”

Section: Article In Pressmentioning

confidence: 86%

The role of ArIII in quantitative spectroscopy on hot argon plasmas

Kühn

Könemann

Kock

2007

Journal of Quantitative Spectroscopy and Radiative Transfer

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We perform quantitative optical emission spectroscopy on the hot core of the cathode region of a free-burning arc in argon under atmospheric pressure. As the peak temperatures in the centre of the discharge exceed 22 000 K we are able to observe three spectra of argon (Ar I, Ar II and Ar III) and the continuum emission. We report on some inconsistencies concerning the evaluation of Ar III radiation in both line and continuum emission. These are caused by erroneous data in the literature and common misconceptions about the influence of Ar III on the plasma emission. We discuss the impact of this fact on published data. r

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“…To check existence of the self-absorption, relative line intensity (I) ratio has been controlled during the plasma decay. Absence of the self-absorption would cause constant relative line intensity ratio [45]. This is fulfilled in the case of the I 425.9 /I 419.1 ratio within the 4sV-5pV Ar I transition.…”

Section: Methodsmentioning

confidence: 93%

Stark width and shift of the neutral argon 425.9 nm spectral line

Milosavljević

Žigman

Djeniže

2004

Spectrochimica Acta Part B: Atomic Spectroscopy

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The Stark parameters, the width (W) and the shift (d), of the neutral argon (Ar I) 425.9 nm spectral line have been studied in a linear, low-pressure, optically thin pulsed arc discharge. The line shapes are measured in three different plasmas at about 16,000 K electron temperature (T) and about 7.0Â10 22 m À3 electron density (N). The separate electron and ion contributions to the total Stark width (W t ), i.e. W e and W i , as well as to the total Stark shift (d t ), i.e. d e and d i , have also been obtained and represent new experimental data in this field.On the basis of the observed asymmetry of the Stark broadened line profile we have deduced the ion broadening parameters, which describe the influence of the ion static (A) and the ion-dynamical effect on the width (D) and on the shift (E) of the line shape. Stronger influence of the ion contribution on the 425.9 nm Ar I line shape than is the one predicted by current theory has been evidenced.On the basis of the accurately recorded 425.9 nm Ar I line shape (in the 4sV-5pV transition), the basic plasma parameters, i.e. electron temperature (T) and electron density (N) have been recovered. This has been achieved by applying the recently developed line deconvolution procedure. The plasma parameters (T and N) have also been measured using independent diagnostics techniques.

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Transition probabilities of several transitions in the Ar III and Ar IV spectra

Cited by 51 publications

References 14 publications

Mg II spectral line broadening in helium, oxygen and argon-helium plasmas

Mg II spectral line broadening in helium, oxygen and argon-helium plasmas

The role of ArIII in quantitative spectroscopy on hot argon plasmas

Stark width and shift of the neutral argon 425.9 nm spectral line

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