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.

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.

scholarly journals Franck-Condon Factors and r-Centroids for Several Systems of CoF Molecule

2015 ◽  
Vol 58 ◽  
pp. 90-101 ◽  
Author(s):  
Q.M. Nadhem ◽  
Behere Supriya ◽  
S.H. Behere
Keyword(s):  
Molecular Constants ◽  
Band Origin ◽  
Condon Factors ◽  
The Relationship ◽  
Franck Condon

Franck–Condon factors factors and r-centroids have been calculated for the G3Φ4-X3Φ4 , K3Φ4-X3Φ4, L3Φ4-X3Φ4, [20.6]3Γ5-X3Φ4 and [34.7]3Γ5-X3Φ4 bands of Cobalt monofluoride 59Co19F from the best available molecular constants using Morse and Rydberg–Klein–Rees (RKR) methods. The reliability of the obtained values was verified by comparing the results of five different programs. Based on the calculated Franck–Condon factors values, the appearance of the bands in these systems are discussed and the relationship between the r-centroids and the band-origin wavenumbers and wavelengths are also determined along with accuracy factors.

A Discussion on photoelectron spectroscopy - Franck-Condon factors and autoionization in the photoelectron spectra of diatomic molecules

1970 ◽  
Vol 268 (1184) ◽  
pp. 159-162 ◽  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Photoionization Cross Section ◽  
Resonance Wavelength ◽  
Exciting Radiation ◽  
Vibrational Structure ◽  
Photoelectron Spectra ◽  
Condon Factors ◽  
Franck Condon ◽  
Characteristic Manner ◽  
Good Agreement

Distributions of calculated Franck-Condon factors for autoionizing transitions are used to illustrate the way in which the vibrational structure of the photoelectron spectrum may be extended in a characteristic manner when the wavelength of the exciting radiation coincides with a resonance in the photoionization cross section of a diatomic gas. The calculations are found to be in good agreement with resonance wavelength photoelectron spectra from O2.

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

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