Stark profiles of some ion lines of alkaline earth elements

doi:10.1016/0022-4073(77)90019-X

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume 17, Issue 5, May 1977, Pages 595-604

https://doi.org/10.1016/0022-4073(77)90019-X Get rights and content

Abstract

The widths and shifts of Mg⁺, Ca⁺, Sr⁺ and Ba⁺ lines broadened by electron and ion Stark effects have been measured in an argon welding type plasma. The electron density is about 1.3×10¹⁷ cm^-3 and the temperature is about 13,000°K. Special care was taken to avoid self-absorption of resonance lines. Injection of alkaline earth elements into the cold region of the plasma edge permitted reliable measurements of the signs of line-shifts. Experimental results are compared with semi-classical theories and a new-classical computation of Sahal-Bréchot in which resonances of elastic cross sections are taken into account. Good agreement is observed between experiment and the later calculations.

References (29)

BelyO. et al.
Phys. Rev.
(1970)
JagerH.
Z. Physik
(1969)
LeleuC. et al.
High Temp. High Pressures
(1970)
HillR.A.
JQSRT
(1967)
GriemH.R.
Plasma Spectroscopy
GriemH.R.
Plasma Spectroscopy
Sahal-BrechotS.
Astron. Astrophys.
(1969)
Sahal-BrechotS.
Astron. Astrophys.
(1969)
JonesW.W. et al.
University of Maryland, Tech. Rep. No. 71–128
(1971)
ChapelleJ. et al.
Astron. Astrophys.
(1970)
CooperJ. et al.
Phys. Rev. Lett.
(1967)
RobertsD.E. et al.
JQSRT
(1972)

BarnesK.S.

J. Phys.

(1971)

BarnesK.S. et al.

J. Phys. B

(1970)

GriemH.R.

Phys. Rev.

(1968)

JonesW.W. et al.

Phys. Rev. A

(1972)

Cited by (139)

Stark broadening parameters of the singly ionized sulfur: S II
2023, Advances in Space Research
Citation Excerpt :
The ionic contribution is much smaller than those of electrons. For the first method, we used the semi-classical perturbation (SCP) approach of Sahal-Bréchot (1969a), Sahal-Bréchot (1969b), Sahal-Bréchot (1974), Fleurier et al. (1977), Sahal-Bréchot et al. (2014) and Sahal-Bréchot (2021). For the second method, we used the modified semi-empirical (MSE) approach by Dimitrijević and Konjević (1980).
Stark broadening parameters are useful in solving various problems e.g., in astrophysics, opacity calculations, design of lasers, laser-produced plasma and for the evaluation of the physical conditions in stellar atmospheres. Our objectives in this research work are to obtain, for electron collisions, new atomic data for Stark broadening of astrophysically important S II lines using semi-classical perturbation (SCP) and modified semi-empirical (MSE) theory with the needed energy levels and oscillator strengths from NIST database. After calculating the Stark broadening data, we compared them with experimental and theoretical data.
Optical time-of-flight and spectroscopic investigation of laser produced barium plasma in presence of magnetic field and ambient gas
2022, Physics Letters, Section A: General, Atomic and Solid State Physics
Optical-time-of-flight and time-resolved spectroscopy of barium ions and neutral have been performed to study the multiple velocity components and spectral behaviour of laser-produced barium plasma in the presence of ambient gas and magnetic field. Initial structured temporal profiles of ionic and neutral species in vacuum due to different velocity components get more pronounced in the presence of ambient gas, magnetic field and combination of both. Multi-Shifted Maxwell-Boltzmann distribution functions are used to analyse different velocity components. Each component behaves differently with ambient gas and magnetic field which is reflected in their shape and intensity variation. The observed results are explained on the basis of characteristic expansion of the plasma plume under different ambient conditions and possible role of excitation and ionization processes.
Quantification of surface contamination on optical glass via sensitivity-improved calibration-free laser-induced breakdown spectroscopy
2021, Applied Surface Science
We report quantitative analysis of manufacturing-induced trace contaminants of optical glass surfaces by laser-induced breakdown spectroscopy (LIBS). Therefore, spectra recorded with an echelle spectrometer coupled to a gated detector were analysed using a calibration-free LIBS approach based on the calculation of the spectral radiance of a plasma in local thermodynamic equilibrium. The measurements were carried out in experimental conditions that enable both accurate modelling of plasma emission and high sensitivity for trace element analysis. Depth-resolved measurements were performed by recording spectra for successive laser pulses applied to the same irradiation sites. Validated via inductively coupled plasma atomic emission spectroscopy for the bulk glass composition, the measurements evidence a surface contamination that originates from polishing during glass manufacturing. The measured penetration depths of the contaminants are discussed in the frame of the underlying mechanisms of surface contamination and related to the changes of the optical properties evidenced by ellipsometric measurements. Demonstrated here for optical glass, the sensitivity-improved calibration-free LIBS approach can be used to quantify contaminations of surfaces in all kind of technological applications.
Matrix effects on laser-induced plasma parameters for soils and ores
2018, Spectrochimica Acta - Part B Atomic Spectroscopy
Citation Excerpt :
We neglected the self-absorption of the line, following the recommendations by Aragón and Aguilera [39] for Fe-Si samples containing 40% iron vs 15.5% of iron in our nodule. Stark width of Sr II 407.77 nm was assumed to be equal to 30 ± 3 pm for Ne = 1017 cm−3 and T = 13,000 K [40]. Since the content of strontium in soils and ores did not exceed 300 ppm, we neglected the line self-absorption.
Matrix effects caused by either physical properties or chemical nature of a sample are the main analytical problems of laser-induced breakdown spectroscopy responsible for worsening of accuracy. We have studied a relation of laser plasma parameters and three intrinsic properties of powders for soils and ores: (i) sample moisture content; (ii) compressive force for sample pelleting; (iii) total content of easily ionized elements (EIEs). We prepared three sets of soils (calcareous, black, and sod-podzol) with different moisture content (from 0% to 8% wt.) by saturation of dried powders with water vapor. Moisture of soils did not influence plasma temperature and its electron density, while the intensity of particular emission line (Mn I 403.08 nm) had two opposite trends for the black and sod-podzol soils, decreasing with moisture content, and increasing for the gray calcareous soil. The latter seems to be due to cementation of Ca-rich soil. A fine-dispersed powder of ferromanganese nodules was compressed by application of compressive force ranged in 0–10 tons/cm² to investigate its influence on plasma parameters. Electron density increased in several times with the growth of compressive force that was mostly expressed at longer delays (7.5 μs). Although the compressive force had not such a strong influence on plasma temperature, we demonstrated that a short delay (0.5–1 μs) provided minimal changes in plasma parameters. The variation of EIEs content (0.5–13% wt.) in the used certified samples allowed investigation of the EIEs effect. Electron density was similar for a relatively low content (<5% wt.), while electron density increased in several times for high content of EIEs. Plasma temperature did not clearly depend on soil types or EIEs content. We concluded that EIEs content mostly influences on ionization equilibrium.
Stark broadening data for ultraviolet lines of Ni V
2024, Monthly Notices of the Royal Astronomical Society
Stark broadening parameters for singly ionized zinc atom
2023, AIP Conference Proceedings

View all citing articles on Scopus

View full text

Stark profiles of some ion lines of alkaline earth elements

Abstract

Phys. Rev.

Z. Physik

High Temp. High Pressures

JQSRT

Astron. Astrophys.

Astron. Astrophys.

University of Maryland, Tech. Rep. No. 71–128

Astron. Astrophys.

Phys. Rev. Lett.

JQSRT

J. Phys.

J. Phys. B

Phys. Rev.

Phys. Rev. A