Spectroscopy and non-equilibrium distribution of vibrationally excited methane in a supersonic jet

被引：20
|
作者：
Bronnikov, DK
Kalinin, DV
Rusanov, VD
Filimonov, YG
Selivanov, YG
Hilico, JC
机构：
[1] PN Lebedev Phys Inst, Moscow 117924, Russia
[2] IV Kurchatov Atom Energy Inst, Russian Sci Ctr, Moscow 123182, Russia
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 1998年 / 60卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1016/S0022-4073(97)00210-0
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-resolution spectra of supersonic jets of vibrationally excited methane have been recorded by diode laser in the 8 mu m region. A formalism for the description of energy distribution is proposed. It allows to estimate populations of vibrational polyads. Under these non-equilibrium conditions, translational temperature is also measured from line profiles. For relaxation, it is shown that vibrational relaxation between polyads is negligible whereas strong redistribution of population arises inside each polyad. Spectroscopically, observed lines involving the first four excited polyads allows cross-checked tests for energy level analysis. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1053 / 1068
页数：16
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