EXTENDED MEASUREMENT AND ANALYSIS OF THE V3-INFRARED BAND OF METHANE

被引：60

作者：

GRAY, DL ^{[1
]}

ROBIETTE, AG ^{[1
]}

PINE, AS ^{[1
]}

机构：

[1] MIT,LINCOLN LAB,LEXINGTON,MA 02173

来源：

JOURNAL OF MOLECULAR SPECTROSCOPY | 1979年 / 77卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0022-2852(79)90183-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Previous Doppler-limited measurements of the allowed lines in the ν3 infrared band of 12CH4, recorded using a stabilized difference-frequency tunable infrared laser system, have been extended to P(17), Q(17), and R(19). The data have been analyzed by diagonalization of an effective Hamiltonian for the v3 = 1 state, in which many higher-order terms (including tensor operators of up to eighth rank) have been added to the usual fourth-order expansion. These extra terms are necessary to reproduce the experimental splitting patterns and in particular to fit an unusual inversion of the ordering of the tetrahedral levels for R = J - 1 around J = 14 in the upper state. The standard deviation of the fit to 440 assigned transitions is 0.0056 cm-1, and the calculated intensities are also in good agreement with experiment. © 1979.

引用

页码：440 / 456

页数：17

共 26 条

[1] CALCULATED SEXTIC CENTRIFUGAL-DISTORTION CONSTANTS OF POLYATOMIC-MOLECULES [J].