Stark widths and oscillator strengths of Xe III lines

Abstract

In order to test the reliability of the Configuration Interaction (CI) method to predict the atomic parameters viz oscillator strengths of complex ions, we measured the profiles of forth (40) strong 6s-6p transitions of Xe III emitted by a pulsed capillary discharge. After deconvoluting the experimental shapes, Stark widths and relative oscillator strengths were obtained. When Least Square Fitted parameters were used in addition to extensive CI (CI + LSF), the agreement between theory and experiment for the gf's is within a factor two for the whole of the lines. Concerning the widths, the semiempirical approach provides values also within a factor two when the Gaunt factor is taken to be g(x) ~ 0.30.

Stark halfwidth trends along the homologous sequence of doubly ionized noble gases

“…The best agreement with the calculated halfwidths for Ne III is obtained with data from Konjević & Pittman (1987), Purić et al (1988) and Uzelac et al (1993); for Ar III with data from Konjević & Pittman (1987) and Djurović et al (2011) and close results from Kobilarov & Konjević (1990) and Djeniže et al (1996); for Kr III the best agreement is obtained with data from Konjević & Pittman (1987) andĆirišan et al (2011 and, finally, for Xe III with data from Konjević & Pittman (1987) and Peláez et al (2006Peláez et al ( , 2009. Taking into account experimental errors and calculation uncertainties, the experimental and theoretical data for all Ne III, Ar III, Kr III and Xe III lines for ns − np transition agree reasonably well, if we exclude results from Iriarte et al (1997). The experimental results for the Ar III, Kr III and Xe III lines for the (n − 1)d − np transitions disagree quite obviously which is also true for the SMSE calculated data.…”

“…The variation of the halfwidth value within seven measurements is about ±16%. The largest variations are between the results of Iriarte et al (1997) and Romeo y Bidegain et al (1998) for the Xe III halfwidths. Furthermore, most of these halfwidth values are considerably higher than the halfwidth results of other authors (see Figs.…”

“…For each paper, we provide a list of the observed ions together with the estimate of the halfwidth experimental errors. Experimental errors from Seidel et al (2001) are taken from the results graphically presented in the paper, while information about the experimental errors in the Iriarte et al (1997) and Romeo y Bidegain et al (1998) Because similar plasma sources were used we can compare the determined Stark halfwidth values along the homologous sequence of doubly ionized noble gases. However, the experiments were performed under different plasma conditions and different diagnostic techniques were used.…”

“…are taken from Konjević & Pittman (1987), Iriarte et al (1997) Konjević & Wiese (1976), Konjević et al (1984), Konjević & Wiese (1990), Konjević et al (2002) and Lesage (2009).…”

“…Owing to these similarities, a gradual increase of the spectral line halfwidths, i.e., the systematic trend should be expected in these cases. For the analysis of (n − 1)d − np and ns−np transitions, the following references are available: Platiša et al (1975), Konjević & Pittman (1987), Purić et al (1988), Kobilarov & Konjević (1990), Uzelac et al (1993), Djeniže et al (1996), Iriarte et al (1997), Romeo y Bidegain et al (1998), Ahmad et al (1998), Blagojević et al (2000), Milosavljević et al (2000Milosavljević et al ( , 2001, Seidel et al (2001), Peláez et al (2006), Bukvić et al (2008), Peláez et al (2009Peláez et al ( ),Ćirišan et al (2011 and Djurović et al (2011).…”