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Redetermination of some of the spectroscopic constants of the electronic ground state of di‐Nitrogen 14 N 2 , 14 N 15 N and 15 N 2 using coherent anti‐stokes Raman spectroscopy
Author(s) -
Gilson T. R.,
Beattie I. R.,
Black J. D.,
Greenhalgh D. A.,
Jenny S. N.
Publication year - 1980
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250090604
Subject(s) - laser linewidth , raman spectroscopy , spectral line , atomic physics , analytical chemistry (journal) , ground state , chemistry , nitrogen , physics , nuclear magnetic resonance , optics , laser , organic chemistry , chromatography , astronomy
Calibrated coherent anti‐Stokes Raman (CARS) spectra have been recorded for the resolved Q branches of the vibrational fundamentals and first hot bands of 14 N 2 , 14 N 15 N and 15 N 2 at a temperature of 1200 K. The spectra show a convolved linewidth of 0.13 cm −1 , and have been used to derive new values of spectroscopic constants, for the species observed, with specific reference to the position of the Q branch lines where J > 20 for v = 1–0, and J = 0–30 for v = 2–1. The critical overlap region of the fundamental and the hot band may now be computer simulated with confidence, which should be of considerable help in combustor thermometry using CARS.