| Document Type
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BL
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| Record Number
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1039928
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| Doc. No
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b794298
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| Main Entry
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Frommhold, Lothar.
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| Title & Author
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Collision-induced absorption in gases /\ Lothar Frommhold.
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| Publication Statement
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Cambridge [England] ;New York :: Cambridge University Press,, 1993.
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| Series Statement
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Cambridge monographs on atomic, molecular, and chemical physics ;; 2
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| Page. NO
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xii, 410 pages :: illustrations ;; 26 cm.
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| ISBN
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0521393450
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: 9780521393454
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| Bibliographies/Indexes
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Includes bibliographical references (pages 377-402) and index.
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| Contents
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1. Introduction. 1.1. Historical sketch. 1.2. Interaction-induced absorption: the characteristics. 1.3. Significance. 1.4. Organization of the material -- 2. Recapitulation. 2.1. Intermolecular potentials. 2.2. Molecular collisions. 2.3. Dimers and larger clusters. 2.4. Distribution functions. 2.5. Molecular multipoles. 2.6. Spectral transforms. 2.7. Dipole radiation. 2.8. Instrumentation -- 3. Experimental results. 3.1. The translational spectra. 3.2. The rototranslational spectra. 3.3. The rotovibrational spectra. 3.4. Collision-induced emission. 3.5. Dipole autocorrelation function. 3.6. Induced spectra and allowed transitions. 3.7. Empirical line shapes. 3.8. Analysis of measured spectra -- 4. Induced dipoles. 4.2. Theory. 4.3. Measurement. 4.4. Computation. 4.5. Miscellaneous remarks. 4.6. Ternary dipoles. 4.7. Asymptotic expressions -- 5. Theory: monatomic gas mixtures. 5.1. Ansatz. 5.2. Spectral moments. 5.3. Virial expansion of line shape. 5.4. Dipole autocorrelation function.
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5.5. Line shapes of diatomic systems. 5.6. Classical diatom line shapes. 5.7. Symmetry of line profiles. 5.8. Intercollisional interference. 5.9. Other approaches to line shape. 5.10. Model line profiles -- 6. Theory: molecular gases. 6.1. Spectral moments. 6.2. Line shapes of pairs of linear molecules. 6.3. Asymmetry of line profiles. 6.4. Dipole autocorrelation function. 6.5. Intercollisional dip. 6.6. Interference of allowed and induced lines -- 7. Related topics. 7.1. Collision-induced electronic spectra. 7.2. Collision-induced light scattering. 7.3. Dielectric properties of gases. 7.4. Astrophysical applications. 7.5. Other applications.
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| Abstract
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The volume deals with the infrared spectra of complexes of two, three ... molecules in collisional interaction. More than 800 original papers have been published in the field since the discovery of collision-induced absorption by H.L. Welsh and associates in 1949. This volume is the first attempt to present the theoretical and experimental foundations of this basic science of the interaction of radiation with supermolecular systems.
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. Specialists and advanced graduate students concerned with the basic principles or applications of the infrared spectroscopy of dense fluids, or with the fundamental interactions of supermolecular complexes with electromagnetic radiation, will find this a valuable text and general reference.
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At high enough gas densities, corresponding roughly to atmospheric pressure or higher, absorption by complexes of two or more interacting molecules takes place. Supermolecular absorption in gases may be described in terms of a virial expansion in powers of the gas density, a fact that permits the separation of the 2-, 3- ... body spectral components for detailed studies. One chapter reviews in detail our knowledge of the interaction-induced dipole moments of dissimilar atomic and of molecular pairs, along with the knowledge of the dipoles of supermolecular systems consisting of three molecules.
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Following a brief introduction and recapitulation of background information (e.g., dipole radiation, molecular collisions and interactions, etc.), the measurements of supermolecular absorption of electromagnetic radiation are reviewed. The focus is on the non polar gases whose molecules are infrared inactive but the effects described are universal for nearly all fluids.
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In subsequent chapters the theory of interaction-induced absorption by rare-gas mixtures and molecular gases is reviewed. Ab initio calculations of the interaction-induced absorption, especially in the various rotovibrational bands of hydrogen, are reviewed and compared with the measurements. A final chapter discusses related phenomena and important applications, especially in the planetary sciences and astrophysics.
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| Subject
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Gases-- Absorption and adsorption.
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Infrared radiation.
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Molecular spectra.
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Molécule.
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Profil et largeur.
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Raie spectrale.
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Spectre infrarouge.
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Spectre.
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Absorptionsspektrum
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Atom-Molekül-Stoß
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Gas
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Gases-- Absorption and adsorption.
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Gaz.
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Infrared radiation.
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Infrared radiation.
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Molecular spectra.
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Rayonnement infrarouge.
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Spectres infrarouges.
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Gas.
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Monte Carlo method-- Simulation.
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| Dewey Classification
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530.4/3
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| LC Classification
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QC162.F76 1993
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| NLM classification
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33.25bcl
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33.30bcl
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33.34bcl
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PHY 510fstub
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PHY 530fstub
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PHY 566fstub
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UM 3260rvk
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