Quantitative analysis of the dipole-moment matrix element for molecules of symmetry C2V

1979 ◽  
Vol 22 (9) ◽  
pp. 1026-1028
Author(s):  
O. K. Voitsekhovskaya ◽  
Yu. S. Makushkin ◽  
V. N. Cherepanov
Keyword(s):  
Dipole Moment ◽  
Quantitative Analysis ◽  
Matrix Element ◽  
Moment Matrix

scholarly journals A Study on the Transversal Optical Mode in Amorphous Gallium Arsenide

1998 ◽  
Vol 21 (3) ◽  
pp. 209-211
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Gallium Arsenide ◽  
Dipole Moment ◽  
Matrix Element ◽  
Infrared Spectrum ◽  
Far Infrared ◽  
Moment Matrix ◽  
Optical Mode ◽  
Structural Disorders

Contributions to the far-infrared spectrum corresponding to both dynamical and structural disorders in a-GaAs are examined when frequency coincides with the transversal optical mode. Under these circumstances, dipole moment matrix element is discussed.

STRUCTURAL DISORDER IN AMORPHOUS III–V COMPOUNDS

1994 ◽  
Vol 08 (04) ◽  
pp. 247-250 ◽  
Author(s):  
M.A. GRADO CAFFARO ◽  
M. GRADO CAFFARO
Keyword(s):  
Dipole Moment ◽  
Matrix Element ◽  
Far Infrared ◽  
Structural Disorder ◽  
Angular Frequency ◽  
Infrared Range ◽  
Maximum Frequency ◽  
Moment Matrix ◽  
Low Frequencies ◽  
First Derivative

Some new results on structural disorder in amorphous III–V semiconductors are established. In particular, a relationship is obtained for the maximum frequency (in the far-infrared range) at which |µ(ω)|/ω is constant (µ(ω) is the dipole moment matrix element in the angular frequency domain). The mathematical behaviors of |µ(ω)| and its first derivative are discussed. Furthermore, absorption coefficient at very low frequencies is determined analytically and compared with the experiment.

The influence of intracollisional interference on the dipole spectrum of HD

1978 ◽  
Vol 56 (1) ◽  
pp. 75-81 ◽  
Author(s):  
R. H. Tipping ◽  
J. D. Poll ◽  
A. R. W. McKellar
Keyword(s):  
Dipole Moment ◽  
Translational Motion ◽  
Rotational Level ◽  
Intermolecular Forces ◽  
Spectral Lines ◽  
Destructive Interference ◽  
Matrix Elements ◽  
Moment Matrix ◽  
Integrated Intensities ◽  
Induced Dipoles

The influence of intracollisional interference on the dipole spectrum of pure HD is investigated within the framework of an adiabatic separation of the relative translational motion and non-mixing of rotational levels. The effect leads to a density dependence of the integrated intensities for the sharp spectral lines. It is found that the large discrepancy between the theoretical and experimental pure rotational dipole moment matrix elements for HD reported in the literature can be interpreted as destructive interference between the allowed and the collision-induced dipoles. Similar calculations for the fundamental band are in excellent agreement with the experimental results for the R1(1) line, but agree less well for the R1(0) line. We interpret this, as well as the asymmetrical line shape, as evidence of rotational level mixing due to anisotropic intermolecular forces.

Dipole moment matrix for vibration - rotation transitions in C3v molecules

1984 ◽  
Vol 45 (9) ◽  
pp. 1429-1447 ◽  
Author(s):  
G. Tarrago ◽  
O.N. Ulenikov ◽  
G. Poussigue
Keyword(s):  
Dipole Moment ◽  
Moment Matrix ◽  
Vibration Rotation

Excitation of transitions between atomic or molecular energy levels by monochromatic laser radiation - I. Excitation under conditions of strictly homogeneous line broadening

1978 ◽  
Vol 362 (1708) ◽  
pp. 1-12 ◽  
Keyword(s):  
Dipole Moment ◽  
Laser Radiation ◽  
Energy Levels ◽  
Incident Radiation ◽  
Line Broadening ◽  
Moment Matrix ◽  
Intensity Parameter ◽  
Inhomogeneous Line Broadening ◽  
Approximate Expressions ◽  
Inhomogeneous Line

The development with time of the excitation of a transition between two atomic or molecular energy levels under the influence of monochromatic laser radiation is examined under conditions of strictly homogeneous line-broadening. The ratio of the number of atoms or molecules, N 2 , in an excited state to the total number, N , is calculated for various ratios of the intensity parameter β ═ E 0 μ/ ħ to the half line-width γ . E 0 is the amplitude of the electric field in the incident radiation and the dipole moment matrix element for the transition. Exact expressions for N 2 / N as a function of time are given for the situation when the frequency ω /2π of the radiation is exactly equal to that of the transition ω 0 /2π. Numerical calculations are made for the situation when the ‘detuning’ δ ═ ω — ω 0 is not equal to zero. Approximate expressions are also derived in terms of δ for use in a later paper which deals with mixed homogeneous and inhomogeneous line-broadening.

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