Measured stark widths of BI, BII, BIII and Nal spectral lines

Djeniže, S.; Srećković, A.; Labat, J.; Platiša, M.

doi:10.1088/0031-8949/45/4/005

Cited by 24 publications

(28 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7). On the other hand, our measured W for the 249.6 nm B I line is (4.8 ± 0.7) pm at 1.09 × 10 23 m −3 electron density and is in agreement (within ±25%) with ones measured in Djeniže et al (1992). Because of the observed absence of the self-absorption in the resonance B III lines, an explanation of this large disagreement is not easy.…”

Section: Line Shape Characteristicssupporting

confidence: 78%

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population

Djeniže¹,

Srećković²,

Bukvić³

2006

A&A

View full text Add to dashboard Cite

Aims. The aim of this work is to present atomic processes which lead to an extra population of the 2p 2 P• 1/2,3/2 B III resonance levels in helium plasma generating intense radiation in the B III 206.578 nm and 206.723 nm lines. Methods. The line profiles were recorded using a step-by-step (7.3 pm) technique which provides monitoring of the line shapes continually during the plasma decay and gives the possibility to compare line shapes at various times in the same plasma. Results. On the basis of the line intensity decays of the doubly ionized boron resonance spectral lines in laboratory nitrogen and helium plasmas, we have found the existence of a permanent energy transfer from He I and He II metastables to the 2p 2 P• 1/2,3/2 B III resonance levels. The shapes of the mentioned lines are also observed. At electron temperatures of about 18 000 K and electron densities about 1.1 × 10 23 m −3 , the Stark broadening was found as a main B III line broadening mechanism. The measured Stark widths (W) are compared with the Doppler width (W D ) and with the splitting in the hyperfine structure (∆ hfs ). Our measured W data are found to be much higher than results obtained by means of various theoretical approaches. Conclusions. The He I and He II metastables over populate the B III resonance levels leading to populations higher than predicted by LTE model. Consequently, the emitted B III resonance lines are more intense than expected from LTE model. This fact can be of importance if B III resonance line intensities are used for abundance determination purposes in astrophysics. Similar behavior can be

show abstract

Section: Line Shape Characteristicssupporting

confidence: 78%

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population

Djeniže¹,

Srećković²,

Bukvić³

2006

A&A

View full text Add to dashboard Cite

show abstract

“…The modified version of the linear low pressure pulsed arc (Djeniže et al 1992(Djeniže et al , 1998(Djeniže et al , 2002Milosavljević et al 2000 has been used as a plasma source. A pulsed discharge Table 1.…”

Section: Methodsmentioning

confidence: 99%

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

Milosavljević

Djeniže

2002

New Astronomy

View full text Add to dashboard Cite

“…A modified version of the linear low-pressure pulsed arc (Djeniže et al 1991;Djeniže et al 1992;Djeniže et al 1998;Milosavljević et al 2000) has been used as an optically thin plasma source. A pulsed discharge was driven in a quartz discharge tube of 5 mm inner diameter and effective plasma length of 7.2 cm ( Fig.…”

Section: Methodsmentioning

confidence: 99%

Stark shifts and transition probabilities in the Ne spectrum

Djeniže

Milosavljević

Dimitrijević

2002

A&A

View full text Add to dashboard Cite

Abstract. Stark shifts (d) and transition probabilities of the spontaneous emission (Einstein's A values) of forty two singly charged neon (Ne ii) ion spectral lines have been measured in a linear, low pressure, pulsed arc at 35 300 K electron temperature and 1.83 × 10 23 m −3 electron density. Transition probabilities have been obtained using the relative line intensity ratio (RLIR) method. Stark shift values have also been calculated, using the semiclassical perturbation formalism (SCPF). The measured and calculated shift values and the measured A values have been compared to the existing data taken from available data sources.

show abstract

Measured stark widths of BI, BII, BIII and Nal spectral lines

Cited by 24 publications

References 12 publications

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population

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

Stark shifts and transition probabilities in the Ne spectrum

Contact Info

Product

Resources

About

Measured stark widths of BI, BII, BIII and Nal spectral lines

Cited by 24 publications

References 12 publications

Role of the He I and He II metastables in the resonance 2p2P$\degr_{1/2, 3/2}$ B III level population

Role of the He I and He II metastables in the resonance 2p2P$\degr_{1/2, 3/2}$ B III level population

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

Stark shifts and transition probabilities in the Ne spectrum

Contact Info

Product

Resources

About

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population

Role of the He I and He II metastables in the resonance 2p²P$\degr_{1/2, 3/2}$ B III level population