Stark widths of several Pb III spectral lines in a laser-induced lead plasma

Abstract

Context. Data on Stark widths of spectral lines are relevant not only for atomic structure research, but also for astrophysics and analytical techniques of plasma diagnosis. Aims. Stark widths of ten doubly ionized lead spectral lines that belong to 7s-7p, 6d-7p and 6p 2 -7p transitions have been measured. Methods. We observe the emission lines from an optically thin laser induced plasma from a lead target in an argon atmosphere. The studied plasma has a temperature of about 25 200 K and an electron density of about 10 17 cm −3 . Local thermodynamic equilibrium conditions and plasma homogeneity have been checked. Special attention was paid to the possible selfabsorption of the different transitions.Results. We report ten new experimental values for Stark widths (FWHM) of Pb III lines.

Theoretical study of the Stark width and shift parameters of Pb iii lines: predictions and regularities

“… Measured ( [b] Alonso‐Medina & Colón 2007) and calculated Stark width FWHM (ω(Å)) and Stark lineshift (d(Å)) versus temperature for 3855.2‐, 4761.1‐ and 4799.9‐Å Pb iii lines. …”

“…Pb III 5d 10 6s nl, 5d 10 6p 2 and 5d 10 6s 2 -5d 10 6s mp linewidths (FWHM) and shifts normalized to N e = 10 17 cm −3 . Linewidths are compared with the experimental published values (Alonso-Medina & Colón 2007).…”

“…Published works on the atomic parameters of Pb iii are scarce (see, for example, Andersen, Kirkegard Nielsen & Sorensen 1972; Migdalek & Baylis 1985; Ansbacher, Pinnington & Kernahan 1987; Pinnington et al 1988; Colón et al 1999; Curtis et al 2001). In a recent work (Alonso‐Medina & Colón 2007), we measured experimental Stark widths for 10 spectral lines of Pb iii using a laser‐induced plasma at 25 200 K and an electron density of 10 17 cm −3 .…”

Measurement of plasma electron density generated in an experiment of Laser Shock Processing, utilizing the Hα-line

“…LIBS is based on the spectroscopic study of the emission of the present species in the plasma, and the advantage consists of obtaining its parameters and has been used by these authors in several works. Before, we have obtained temperature, electron density, atomic parameters and Stark broadening parameters in different laser induced plasma as: several parameter in aluminum plasma (Colon et al, 1993); transition probabilities of Pb III in lead plasma (Colon et al, 1999); Stark widths of spectral lines of Pb II in lead plasma (Colon and Alonso-Medina, 2006); transition probabilities of Pb Sn II in tin plasma (Alonso-Medina et al, 2003); Stark widths of several Pb III spectral lines in lead plasma (Alonso-Medina and Colon, 2007); Stark widths of several Sn I and Sn II spectral lines in tin plasma (Alonso-Medina and Colon, 2008); transition probabilities of Sn I in tin-lead plasma (Alonso-Medina, 2010) and recently the transition probabilities of Ca I in calcium-lead plasma (Alonso-Medina, 2014).…”

On the semiclassical perturbation Stark shifts of Ar II spectral lines

“…Ar II spectral lines are also used in plasma diagnostic. Alonso-Medina & Colón (2007) used Ar II spectral lines for the determination of temperature and electron density of laser induced lead plasma. Beside laboratory plasmas, singly charged argon spectral lines are also of interest for argon laser (Dimitrijević & Csillag, 2006).…”