| Description |
1 online resource (xii, 292 pages) : illustrations |
| Contents |
1. Basic definitions. 1.1. Shape and parameters of a spectral line. 1.2. Principle line-broadening mechanisms and model profiles. 1.3. Broadening, shifting and narrowing coefficients. 1.4. Line interference -- 2. Semi-classical calculation of pressure-broadened line widths and pressure-induced line shifts. 2.1. Quantum system of two interacting molecules. 2.2. Spectral function. 2.3. General expressions for line half-width and shift calculation. 2.4. Anderson-Tsao-Curnutte theory. 2.5. Interaction potential and irreducible tensors formalism. 2.6. Interruption function for the long-range intermolecular potential. 2.7. Resonance functions in the straight-line trajectory approximation. 2.8. Advanced semi-classical methods for line-broadening calculation. 2.9. Parabolic trajectory approximation. 2.10. Resonance functions within the exact trajectory model. 2.11. Approximation for the real parts of exact-trajectory resonance functions. 2.12. Approximation for the imaginary parts of exact-trajectory resonance functions. 2.13. Short-range forces and trajectory effects. 2.14. Robert and Bonamy formalism with exact trajectories -- 3. Collisional broadening of water vapour lines. 3.1. Effective operators of physical quantities for X[symbol]Y molecule and vibrotational wave functions for water vapour molecule. 3.2. Self-broadening of H[symbol]O lines. 3.3. Analytical representation for self-broadening parameters of water vapour. 3.4. Semi-empirical approach to calculation of water vapour line widths and shifts. 3.5. Broadening of water vapour lines by nitrogen, oxygen and carbon dioxide. 3.6. Interference of water vapour spectral lines. 3.7. Broadening of water vapour lines by hydrogen and rare gases. 3.8. Tabulation of H[symbol]O line-broadening coefficients for high temperatures -- 4. Pressure broadening and shifting of vibrotational lines of atmospheric gases. 4.1. Vibrotational lines of asymmetric X[symbol]Y molecules. 4.2. Vibrotational lines of ethylene. 4.3. Vibrotational lines of symmetric tops. 4.4. Broadening coefficients of vibrotational lines of methane. 4.5. Linear molecules. 4.6. Diatomic molecules |
| Summary |
This book presents a comprehensive overview of the modern theory of spectral line broadening and shifting by pressure of atmospheric gases. It describes current semi-classical methods for calculating vibrotational line widths and shifts, including very recent modifications and new developments realised by the authors themselves. For most of the considered molecular systems, analytical formulae are also given, which enable the calculation of line broadening coefficients without the use of semi-classical methods. The results of calculations by various approaches are compared with experimental data available in the literature. Numerous appendices list theoretical expressions and parameters' values required for the writing of computer programs for calculation of line broadening and line shifting coefficients. The book is addressed to undergraduate and postgraduate students as well as to professional scientists and researchers working in the field of molecular physics, molecular spectroscopy, quantum chemistry and mathematical physics |
| Bibliography |
Includes bibliographical references and index |
| Notes |
Print version record |
| Subject |
Spectral line broadening.
|
|
NATURE -- Sky Observation.
|
|
Spectral line broadening
|
| Form |
Electronic book
|
| Author |
Lavrentieva, Nina
|
|
Starikov, Vitaly
|
| ISBN |
9781848165977 |
|
1848165978 |
|
