Spectral Line Broadening in Dense Plasmas

B. Omar
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引用次数: 4

Abstract

Spectral line broadening is calculated based on a microscopic quantum statistical approach. By using thermodynamic Green's function, plasma correlation effect, electrostatic and dynamic screening, and perturber-radiator interaction are taken into account. Ions are treated in quasistatic approximation due to Stark effect. The line broadening for 6678 A (21P-31D) and 5016 A (21S-31P) transitions of neutral helium is calculated in the electron density range and temperature range , and the density and temperature dependence of the line width are investigated. A good agreement is shown by comparing the calculated values with the existing experimental and theoretical data.
密集等离子体中的谱线展宽
光谱线展宽是基于微观量子统计方法计算的。利用热力学格林函数,考虑了等离子体相关效应、静电和动态筛选以及摄动器-辐射体相互作用。由于斯塔克效应,离子采用准静态近似处理。计算了中性氦的6678 A (21P-31D)和5016 A (21S-31P)跃迁在电子密度和温度范围内的谱线展宽,并研究了谱线宽度与密度和温度的关系。将计算值与已有的实验和理论数据进行了比较,结果表明两者吻合较好。
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