Stark shifts and transition probabilities in the Ne spectrum

2002

New Astronomy

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Section: Methodsmentioning

confidence: 99%

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

2002

New Astronomy

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“…The modified version of the linear low pressure pulsed arc [40][41][42][43][44] has been used as a plasma source. Pulsed discharge was performed in a quartz discharge tube.…”

Section: Methodsmentioning

confidence: 99%

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

Žigman

Spectrochimica Acta Part B: Atomic Spectroscopy

2004

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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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“…The modified version of the linear low pressure pulsed arc (Djeniže et al 1991(Djeniže et al , 1998(Djeniže et al , 2002Milosavljević et al 2000 has been used as a plasma source. Pulsed discharge was performed in a quartz discharge tube.…”

Section: Methodsmentioning

confidence: 99%

Astrophysical plasma diagnostics through analysis of $\ion{Ar}{I}$ line shape characteristics

2003

A&A

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