Stark effect at high electric fields and Stark ion broadening widths and shifts for different microfield distributions at quasistatic approximation in atomic oxygen spectra.

IF 2.2 3区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS
S Werbowy, B Pranszke, L Windholz
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引用次数: 0

Abstract

Studies of the static Stark effect are reported for the multiplets at 615.8, 645.6, 777.6, 822.4, 844.9, and 926.5 nm (vacuum wavelengths) of atomic oxygen, which are important for various applications. From the Stark patterns recorded at very high electric fields up to 780 kV/cm, we have determined the differences of the scalar polarizabilities Δα_{0} and the tensor polarizabilities α_{2} for the investigated lines. For most of the lines we present the first-obtained experimental results. The Stark broadening of the studied lines by non-neutral plasmas in the ion density range of 10^{13}-10^{19}cm^{-3} was analyzed based on these results. The quasistatic approximation and three distinct microfield distributions were employed, which corresponded to different types of coupling in the plasma, namely the Holtzmark, Mayer, and irregular cluster distributions. Ion broadened widths and shifts were obtained from the simulated line shapes for different microfield distributions and ion densities. The analysis of these outcomes enabled us to determine their correlations with the independently determined Δα_{0} and microfield distribution, ultimately enabling us to ascertain the contour of the microfield distribution itself.

原子氧光谱准静态近似下不同微场分布的Stark效应和Stark离子展宽宽度和位移。
本文报道了原子氧在615.8、645.6、777.6、822.4、844.9和926.5 nm(真空波长)处的静态Stark效应的研究,这对各种应用具有重要意义。根据在780 kV/cm的高电场下记录的Stark模式,我们确定了所研究线路的标量极化率Δα_{0}和张量极化率α_{2}的差异。对于大多数谱线,我们给出了首次获得的实验结果。在离子密度为10^{13}-10^{19}cm^{-3}的范围内,分析了非中性等离子体对所研究谱线的Stark展宽。准静态近似和三种不同的微场分布对应于等离子体中不同类型的耦合,即Holtzmark分布、Mayer分布和不规则簇分布。在不同的微场分布和离子密度下,通过模拟线形得到了离子加宽宽度和位移。对这些结果的分析使我们能够确定它们与独立确定的Δα_{0}和微场分布的相关性,最终使我们能够确定微场分布本身的轮廓。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physical Review E
Physical Review E PHYSICS, FLUIDS & PLASMASPHYSICS, MATHEMAT-PHYSICS, MATHEMATICAL
CiteScore
4.50
自引率
16.70%
发文量
2110
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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