Near-infrared Rayleigh scattering of SF6

被引：3

作者：

Snels, Marcel ^{[1
]}

Stefani, Stefania ^{[2
]}

Piccioni, Giuseppe ^{[2
]}

机构：

[1] Consiglio Nazl Ric CNR, Ist Sci Atmosfera & Clima ISAC, Rome, Italy

[2] Ist Nazl AstroFis INAF, Ist Astrofis & Planetol Spaziali IAPS, Rome, Italy

来源：

MOLECULAR PHYSICS | 2013年 / 111卷 / 14-15期

关键词：

Rayleigh scattering; sulphur hexafluoride; collision-induced absorption; cavity ring down; near-infrared; COLLISION-INDUCED ABSORPTION; INTEGRATED-INTENSITIES; SULFUR-HEXAFLUORIDE; REFRACTIVE-INDEX; BANDS; CO2; TEMPERATURE; DENSITY; GASES; CH4;

D O I：

10.1080/00268976.2013.807365

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cavity ring-down measurements have been performed on sulphur hexafluoride, in order to determine the extinction in the pressure range from 0 to 20 bar at 20 degrees C (293 K), by using a tunable continuous wave distributed feedback diode laser emitting around 1180 nm. The cavity loss rate has been found to have both a linear dependence and a quadratic dependence on the gas density. While the linear component has been identified with the Rayleigh scattering, the quadratic component is likely due to collision-induced processes. The Rayleigh scattering cross section at 1180 nm has been determined as (1.25 +/- 0.18) x10(-27)cm(2) and has been compared with Rayleigh scattering cross sections measured in the deep-ultraviolet and visible spectral region.

引用

页码：2314 / 2319

页数：6

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