High resolution emission spectrum, molecular constants and Franck-Condon factors for the A2Π — X2Π system of ClO

1976 ◽  
Vol 5 (3) ◽  
pp. 180-181
Author(s):  
J.A. Coxon ◽  
E. Skolnik ◽  
W.E. Jones
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Molecular Constants ◽  
Condon Factors ◽  
Franck Condon

Investigations of metal ion – rare gas pairs by optical spectroscopy: High resolution analysis of the A2Πr–X2Σ+ system of BeAr+

1976 ◽  
Vol 54 (15) ◽  
pp. 1535-1544 ◽  
Author(s):  
K. V. Subbaram ◽  
J. A. Coxon ◽  
W. E. Jones
Keyword(s):  
High Resolution ◽  
Metal Ion ◽  
Valence Electron ◽  
Rare Gas ◽  
Electron Systems ◽  
Molecular Constants ◽  
High Resolution Analysis ◽  
Condon Factors ◽  
Resolution Analysis ◽  
Franck Condon

Rotational analyses have been performed for the 1–0, 0–0, 0–1, 0–2, 0–3, and 0–4 bands of the A2Πr–X2Σ+ system of BeAr+ near 4000 Å. Molecular constants have been obtained by direct least squares fits of the line frequencies to model Hamiltonians. The Λ-type doubling in the A state is compared with that found for other nine valence-electron systems. RKR curves are calculated for both states, and provide an estimate of Dc″ = 4100 ± 200 cm−1 for the X2Σ+ state. Franck–Condon factors and r-centroids for the transition are also reported.

Structure and analysis of the B–X band system of GaO

1979 ◽  
Vol 57 (3) ◽  
pp. 496-504 ◽  
Author(s):  
B. R. Yadav ◽  
S. B. Rai ◽  
D. K. Rai
Keyword(s):  
High Resolution ◽  
Potential Energy ◽  
Electronic Spectrum ◽  
Band System ◽  
Rotational Structure ◽  
Potential Energy Curves ◽  
Molecular Constants ◽  
X Band ◽  
Condon Factors ◽  
Franck Condon

The electronic spectrum of the GaO molecule has been re-investigated in the region 3600–4200 Å The use of high resolution and dispersion permitted clear resolution of the rotational structure and the formation of head of heads in Δν = + 1 and + 2 sequences is clearly visible. The rotational analyses of the (0,0) and the (1,0) bands have been performed and more reliable molecular constants have been obtained. Intensity anomalies in the bands have been explained on the basis of the true potential energy curves and the associated Franck–Condon factors.

Further Analyses of Infrared 1Π → 1Σ Bands of 89Y127I: New Spectroscopic Data on States up to υ"=7 and υ'=4

1984 ◽  
Vol 39 (1) ◽  
pp. 27-31 ◽  
Author(s):  
A. Bernard ◽  
R. Gravina
Keyword(s):  
Spectroscopic Data ◽  
Molecular Constants ◽  
Dense Structure ◽  
Normal Distributions ◽  
Synthetic Spectra ◽  
Condon Factors ◽  
Emission System ◽  
Franck Condon ◽  
Potential Curves ◽  
Rms Errors

This paper deals with the extension of a recent study of the infrared 1Π → 1Σ emission system of the YI molecule (1). Thanks to the extreme regularity of the structure, rotational analyses can be completed for the previous 3-1, 2-0, 1-0, 0-0 and 0-1 bands and extended to 11 more bands detected step by step from their synthetic spectra (owing to the extremely dense structure). A unique and consistent set of accurate rotational constants is derived for both states, up to the levels υ" = 7 and υ' = 4, from the reduction of 5772 line wavenumbers in the bands 3-1, 2-0, 1-0, 0-0. 0-1. 0-2, 1-3, 2-4, 2-5, 3-6 and 4-7, the υ-connected bands being fitted simultaneously. The 57 estimated constants allow to reproduce the observed spectra with typical weighted rms errors between 4 and 5 mK. When using these constants to generate the bands 2-1, 1-2, 3-3, 1-4 and 3-5, ~1300 lines can be picked out whose experimental positions relatively to the predicted ones correspond to quite equivalent rms errors with nearly normal distributions of the residuals, therefore ensuring the reliability of the analysis. Molecular constants at equilibrium are derived; improvments are significant, particularly for vibration. Franck-Condon factors and r-centroïds appropriate to RKR potential curves are given. The observed bands correspond to those which are predicted to be the strongest ones in each υ'-progression.

Low-lying electronic states of CuBr

2001 ◽  
Vol 79 (2-3) ◽  
pp. 299-343 ◽  
Author(s):  
T Hirao ◽  
P F Bernath
Keyword(s):  
Fourier Transform ◽  
Electronic States ◽  
Buffer Gas ◽  
Fourier Transform Spectrometer ◽  
Molecular Constants ◽  
Expansion Formula ◽  
Condon Factors ◽  
Mass Dependent ◽  
Franck Condon ◽  
Potential Curves

The A1Π – X1Σ+ and B1Σ+ – X1Σ+ transitions of copper monobromide, CuBr, were recorded with a Fourier transform spectrometer. The emission was generated by using a hollow cathode discharge of Ar buffer gas and a mixture of Cu and CuBr powders. The mass-dependent Dunham expansion formula was used to obtain improved molecular constants for the ground, A and B states. These molecular constants provided RKR potential curves and Franck–Condon factors for the A–X and B–X transitions.PACS No. 35.80 transitions. PACS No. 35.80

THE ELECTRONIC EMISSION SPECTRUM AND MOLECULAR CONSTANTS OF IODINE MONOFLUORIDE

1966 ◽  
Vol 44 (2) ◽  
pp. 337-352 ◽  
Author(s):  
R. A. Durie
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Dissociation Energy ◽  
Band System ◽  
Vibrational Analysis ◽  
Rotational Structure ◽  
Molecular Constants ◽  
Present Evidence ◽  
Halogen Compounds ◽  
Concave Grating

Observation by the author (Durie 1951) of a well-developed band system in the emission from an iodine–fluorine flame provided the first evidence for the existence of iodine monofluoride (IF), the last of the six possible diatomic inter-halogen compounds to be detected. The spectrum, which lies in the region 4 300 to 7 600 Å, has since been photographed under high resolution using a 21-ft concave grating spectrograph. The rotational structure of the bands is shown to be consistent with an A3Π0+ → X1Σ transition in the IF molecule. A rotational and vibrational analysis of the bands has been carried out and the molecular constants evaluated for IF. The results are as follows:[Formula: see text]The present evidence relating to the value of the dissociation energy of IF is discussed.

High resolution emission spectrum of H2 between 78 and 118 nm

1984 ◽  
Vol 62 (12) ◽  
pp. 1686-1705 ◽  
Author(s):  
Jean-Yves Roncin ◽  
Françoise Launay ◽  
Michel Larzilliere
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Appreciable Amount ◽  
Molecular Constants ◽  
Strong Emission ◽  
Reported Data ◽  
Quantum Defect Theory ◽  
First Time ◽  
Line Positions ◽  
Absorption Features

The complete high resolution emission spectrum of molecular hydrogen is obtained for the first time in the range 78–118 nm. A uniform set of data is derived from accurate line positions of the (unperturbed) Q branches of the C, D, D′, and [Formula: see text] transitions. Molecular constants fitted for both the ground state and the excited states of symmetry [Formula: see text] are obtained. For the latter case, they are compared with ab initio and multichannel quantum defect theory (MQDT) calculations. Self-absorption features indicate the production, in an appreciable amount, of H2(ν″ = 1) in the discharge. The reported data were not available to laser physicists and also astrophysicists who have observed strong emission lines of H2 from the atmospheres of Jupiter and Saturn.

scholarly journals Franck-Condon factors and observed band strength distribution in the vibrational structure of the Ag2 D-X band system

2010 ◽  
Vol 75 (5) ◽  
pp. 659-667 ◽  
Author(s):  
Ankica Antic-Jovanovic ◽  
Milos Momcilovic ◽  
Vojislav Bojovic ◽  
Murtadha Khakoo ◽  
Russ Laher
Keyword(s):  
Band System ◽  
Strength Distribution ◽  
Vibrational Structure ◽  
Isotopic Effect ◽  
Molecular Constants ◽  
Band Origin ◽  
Isotopic Shifts ◽  
X Band ◽  
Condon Factors ◽  
Franck Condon

Potential curves for the X1?g+ and D1?u+ states of three diatomic silver isotopomers, 107Ag2, 107Ag109Ag and 109Ag2, were determined from the best available molecular constants by the Rydberg-Klein-Rees method. From these potentials, Franck-Condon factors and band-origin wave numbers were computed, and the reliability of the obtained values was verified by comparison with the observed band strength distribution and the measured band origin positions in a previously recorded D-X spectrum. The ratios of the Franck-Condon factors to those of corresponding isotopic bands were found to be very close to unity, revealing only a very small isotopic effect on the Franck Condon factors of Ag2 D-X bands. The isotopic shifts of the calculated band origins agree well with previously measured displacements of band heads.

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