Algebraic approximation of the spectral line profile with allowance for hard and soft speed-related collisions

被引：4

作者：

Kochanov V.P. ^{[1
]}

机构：

[1] V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, pl. Akademika Zueva 1, Tomsk

来源：

Atmospheric and Oceanic Optics | 2015年 / 28卷 / 5期

关键词：

approximation; hard collisions; line profile; soft collisions;

D O I：

10.1134/S1024856015050085

中图分类号：

学科分类号：

摘要：

An algebraic approximation has been obtained for a spectral line profile derived with allowance for collisions with scattering both at large and small angles. In the region of practically significant parameters, deviations of the approximate profile from the exact calculation do not exceed a tenth of a percent. It is shown that soft collisions with scattering at classical small angles reduce the effect of the collisional narrowing of lines owing to which the line profile becomes flatter as compared to the profile in the model of hard speedrelated collisions. The relative difference between maximum amplitudes of these profiles can reach 15%, which leads to the necessity to take into account soft collisions together with hard collisions in the quantitative processing of high-resolution spectra under conditions of nonuniform broadening of the lines. © 2015, Pleiades Publishing, Ltd.

引用

页码：394 / 399

页数：5

共 24 条

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