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Issue A&A
Volume 425, Number 1, October I 2004
Page(s) 361 - 365
Section Atomic, molecular and nuclear data
DOI http://dx.doi.org/10.1051/0004-6361:20041197



A&A 425, 361-365 (2004)
DOI: 10.1051/0004-6361:20041197

Stark broadening and transition probability ratios in the Mg I spectrum

S. Djenize, S. Bukvic and A. Sreckovic

Faculty of Physics, University of Belgrade, 11 001 Belgrade, PO Box 368, Serbia
    e-mail: steva@ff.bg.ac.yu

(Received 30 April 2004 / Accepted 17 June 2004)

Abstract
Stark widths ( W) and shifts ( d) of the six astrophysically important 285.212, 383.230, 383.829, 516.732, 517.268, and 518.360 nm neutral magnesium (Mg I) spectral lines in the $3{\rm s}^2\,{^{1}}{\rm S}{-}3{\rm p}^{1}{\rm P}{^0}, 3{\rm p}^{3}{\rm P}{^0}{-}3{\rm d} ^{3}{\rm D}$ and $3{\rm p}^{3}{\rm P}{^0}{-}4{\rm s}^{3}{\rm S}$ transitions have been measured in laboratory helium plasma at about 50 000 K electron temperature and 1  $\times$ 1023 m -3 electron density. They represent the first measured values and, also, the first experimental  W and  d data in the mentioned transitions. Using the relative line intensity ratios of the lines in the mentioned transitions we have obtained the ratios of corresponding transition probability values (Einstein's A values). They represent the first experimental data based on the analysis of the Mg I emission spectral lines. We have found agreement with theoretical transition probability ratios tabulated by NIST.


Key words: atomic data -- line: profiles




© ESO 2004

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