Spectroscopic measurement of Stark broadening parameter of the 636.2 nm Zn I-line

Abstract

<p class="MsoNormal" style="text-align:justify;"> In this article we will present an attempt to measure the Stark broadening parameter of the Zn I-line at 636.23 nm utilizing the optical emission spectroscopy (OES) technique, taking into consideration the possibility of existence of self absorption. This method is standing on comparison of the Lorentzian FWHM and spectral line intensity of the unknown Stark broadening parameter line (Zn I-636.23 nm—in our case) to a well known Stark parameter line (e.g. Zn I-lines at 472.2, 481 and 468 nm) at a reference electron density of 2.7 × 10¹⁷ cm^-3 and temperature of 1 eV. We have utilized the emission spectral data acquired from well diagnosed plasma produced by the interaction of Nd: YAG laser at wavelength of 1064 nm with ZnO nanomaterial target in open air. The results indicates that the Stark broadening of the Zn I-line at 636.23 nm is centered at 5.06 ± 0.03 Å with a 25% uncertainty at the given reference plasma parameters. The knowledge of the Stark broadening parameter of the 636.23 nm line may be important in the diagnostics of the laser plasma experiments especially in the absence of the Hα-line. </p

Effect of laser irradiance on the surface morphology and laser induced plasma parameters of zinc

“…The value for Δλ is obtained by fitting the line with a Voigt profile and by considering the width of its Lorentzian component (Cristoforetti et al, 2010b). The Stark broadening parameter for 636.23 nm Zn(I) line has been taken from the work reported in Sherbini et al (2013). When SA value is nearly equal to 1 and it indicates that self-absorption effects are negligible while SA≪1 indicates that nonlinear effects are strong (Cristoforetti et al, 2010b).…”

Feasibility of Using Boltzmann Plots to Evaluate the Stark Broadening Parameters of Cu(I) Lines

“…[1][2][3][4][5][6][7][8][9][10] The natural process of plasma self-absorption effectively leads to distortion of emission line shape and consequently over and/or underestimated of plasma parameters. [9][10][11][12][13][14] However, the distorted lines can be recovered after carrying well-known procedures utilizing the presence of the optically thin H a line. [9][10][11][12][13][14] The Boltzmann plot method has been previously used to estimate the missing values of transition probabilities and Stark broadening parameters of several atomic transitions.…”

“…[9][10][11][12][13][14] However, the distorted lines can be recovered after carrying well-known procedures utilizing the presence of the optically thin H a line. [9][10][11][12][13][14] The Boltzmann plot method has been previously used to estimate the missing values of transition probabilities and Stark broadening parameters of several atomic transitions. 10,[15][16][17][18][19][20][21][22][23][24][25] This should be ultimately carried out provided that at least one of these quantities should be available with sufficient accuracy.…”

Diagnostics of Zinc-Selenium plasma produced by Nd:YAG laser

“…E. de Posada et al [9] presented self-absorption influence on the optical spectroscopy of zinc oxide laser produced plasma. El Sherbini et al [10] presented the measurement of the stark broadening parameter of the Zn I-line at 636.23 nm using the optical emission spectroscopy technique. Cantu and Mazzoni [11] studied the absorption spectrum of selenium photographed in the region from 800 to 2300 A on a variety of spectrographs.…”

“…We have also studied the energy behavior of the lines intensity for the Zn (I) prominent lines at 468.01, 472.21 and 481.05 nm originating from the 4s5s 3 S Variation of the electron temperature with the laser irradiance using fundamental and second harmonics of the Variation of the electron number density with the laser irradiance using fundamental and second harmonics of the laser. 10 10 3 × 10 10 4 × 10 10 5 × 10 10 6 × 10 10 7 × 1010 Laser irradiance, W cm −2…”