External cavity tunable diode laser spectra of the v1+2v4 stretch-bend combination bands of 14NH3 and 15NH3

被引：34
作者：
Li, Li
Lees, R. M.
Xu, Li-Hong
机构：
[1] Univ New Brunswick, CLAMS, St John, NB E2L 4L5, Canada
[2] Univ New Brunswick, Dept Phys Sci, St John, NB E2L 4L5, Canada
来源：
JOURNAL OF MOLECULAR SPECTROSCOPY | 2007年 / 243卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
ammonia; NH3; infrared spectra; (NH3)-N-15; ECTDL; tunable diode laser; vibrational spectrum; v(1)+2v(4) combination band; isotopic shifts; 1.5; MU-M; ENHANCED ABSORPTION-SPECTROSCOPY; ROTATION ENERGY-LEVELS; INFRARED REGION; AMMONIA; NH3;
D O I：
10.1016/j.jms.2007.04.003
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：
The ammoniav, + 2v(4) perpendicular stretch-bend combination band has been investigated in spectra of (NH3)-N-14 and (NH3)-N-15 recorded in the 6400-6800 cm(-1) region with an external cavity tunable diode laser (ECTDL) spectrometer. For (NH3)-N-14, new assignments were determined initially by extrapolating from published low-J jet-cooled beam results up to transitions of higher J and K. Corresponding v(1) + 2v(4) transitions for the (NH3)-N-15 species were then found by identifying similar patterns of lines with a characteristic downshift of approximately 9.7 cm(-1). Assignments were confirmed employing ground-state combination differences. Term values, a-s inversion splittings, l-doubling energies and parameter estimates from simple single-state fits are reported for the two ammonia species. (C) 2007 Elsevier Inc. All rights reserved.
引用
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页码：219 / 226
页数：8
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