Analysis of infrared absorption line shapes in condensed media: Application of a classical limit of Heisenberg’s equations of motion

1983 ◽  
Vol 78 (5) ◽  
pp. 2240-2247 ◽  
Author(s):  
D. J. Diestler
Keyword(s):  
Absorption Line ◽  
Infrared Absorption ◽  
Classical Limit ◽  
Equations Of Motion ◽  
Condensed Media ◽  
Line Shapes

On the role of molecular clustering on infrared absorption line shapes of acetylene in a supersonic expansion

2008 ◽  
Vol 463 (4-6) ◽  
pp. 345-348 ◽  
Author(s):  
K. Didriche ◽  
C. Lauzin ◽  
P. Macko ◽  
W.J. Lafferty ◽  
R.J. Saykally ◽  
...  
Keyword(s):  
Absorption Line ◽  
Infrared Absorption ◽  
Supersonic Expansion ◽  
Line Shapes ◽  
Molecular Clustering

scholarly journals Production and Characterization of Oxyhydroxyapatites

2018 ◽  
Vol 762 ◽  
pp. 48-53
Author(s):  
Liene Pluduma ◽  
Karlis Agris Gross ◽  
Christian Rey ◽  
Arnolds Ubelis ◽  
Astrida Berzina
Keyword(s):  
Fourier Transform ◽  
Detailed Analysis ◽  
Absorption Line ◽  
Infrared Absorption ◽  
Fourier Transform Infrared ◽  
Peak Shift ◽  
Ion Absorption ◽  
Hydroxyl Ion

The amount and alignment of hydroxyl ions influence the bioactivity of hydroxyapatite. Hydroxyl ions in hydroxyapatite are the most mobile and upon heating are the first to leave the lattice to form oxyhydroxyapatite. This work describes a method for producing hydroxyapatite with different amounts of hydroxyl ions, and reports on the changes in Fourier transform infrared absorption at increasing level of dehydroxylation. Detailed analysis of spectra in the 500 – 700 cm-1 range showed a peak shift for the hydroxyl ion absorption line at 632 cm-1 to 637 cm-1 and an increase in the wavenumber for the phosphate line at 575 cm-1.

Comment on the Calculation of Absorption Line Shapes for Mixed-Valence Dimers

1994 ◽  
Vol 98 (43) ◽  
pp. 11230-11232 ◽  
Author(s):  
Mary Jo Ondrechen ◽  
Alessandro Ferretti ◽  
Alessandro Lami ◽  
Giovanni Villani
Keyword(s):  
Absorption Line ◽  
Mixed Valence ◽  
Line Shapes

scholarly journals Lorentz Violation at the Level of Undergraduate Classical Mechanics

Symmetry ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 1734 ◽  
Author(s):  
Madeline Clyburn ◽  
Charles D. Lane
Keyword(s):  
Classical Limit ◽  
Binary Star ◽  
Equations Of Motion ◽  
Computational Simulation ◽  
Classical Mechanics ◽  
Lorentz Violation ◽  
Standard Model Extension ◽  
Model Extension ◽  
Binary Star System ◽  
Interesting Behavior

In this paper, we use the classical limit of the Standard-Model Extension to explore some generic features of Lorentz violation. This classical limit is formulated at the level of undergraduate physics. We first discuss the general equations of motion and then concentrate on three specific systems. First, we consider the theoretical aspects of pendulum motion in the presence of Lorentz violation, followed by some sample experimental results. The experimental bounds we achieve, in the range of 10−3, are not competitive with the current bounds from atomic clocks; rather, our experiment illustrates some common ideas and methods that appear in Lorentz-violation studies. We then discuss how Newton’s 2nd Law must be treated with caution in our model. Finally, we introduce a computational simulation of a binary star system that is perturbed by Lorentz-violating effects. This simulation shows some interesting behavior that could be the subject of future analytical studies.

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