Diode laser measurements of linestrength and temperature-dependent lineshape parameters of H2O-, CO2-, and N2-perturbed H2O transitions near 2474 and 2482 nm
Diode laser measurements of linestrength and temperature-dependent lineshape parameters of H2O-, CO2-, and N2-perturbed H2O transitions near 2474 and 2482 nm
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DOI：
10.1016/j.jqsrt.2013.06.008
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发表时间：
2013-11-01
影响因子：
2.3
通讯作者：
Hanson, Ronald K.
中科院分区：
文献类型：
--
作者：
Goldenstein, Christopher S.;Jeffries, Jay B.;Hanson, Ronald K.
用两个分布反馈半导体激光器在加热的静态池中高分辨率地测量了4029.52和4041.92 cm（-1）附近两个未分辨的H2O双峰的吸收线形。在650-1325 K和2-760 Torr的温度和压力范围内，分别获得了H2O，CO2和N-2扰动的测量。在CO2和N2-中观察到强的碰撞窄化效应，但在纯水中没有观察到。Galatry配置文件被用来推断碰撞加宽和窄化系数和它们各自的温度依赖性CO2和N-2扰动。CO2扰动的碰撞增宽和变窄系数被发现以类似的方式随着温度的升高而降低。对于N-2微扰，碰撞增宽系数随温度的升高而增大，而碰撞窄化系数随温度的升高而减小。从Voigt轮廓拟合推断自增宽系数，并与HITEMP 2010进行比较。还报道了17个H_2O跃迁的谱线强度。(C)2013爱思唯尔有限公司保留所有权利。
Absorption lineshapes for two unresolved H2O doublets near 4029.52 and 4041.92 cm(-1) were measured at high-resolution in a heated static cell using two distributed-feedback diode lasers. Measurements were acquired for H2O, CO2, and N-2 perturbers over a temperature and pressure range of 650-1325 K and 2-760 Torr, respectively. Strong collisional narrowing effects were observed in CO2 and N-2, but not in pure H2O. The Galatry profile was used to infer collisional-broadening and -narrowing coefficients and their respective temperature dependence for CO2 and N-2 perturbers. The collisional-broadening and -narrowing coefficients for CO2 perturbers were found to decrease with increasing temperature in a similar manner. For N-2 perturbers, the collisional-broadening coefficients increased with temperature while the collisional-narrowing coefficients decreased with increasing temperature. Self-broadening coefficients were inferred from Voigt profile fits and are compared with HITEMP 2010. The linestrengths of 17 H2O transitions are also reported. (C) 2013 Elsevier Ltd. All rights reserved.