Collisional effects on molecular spectra: laboratory experiments and models, consequences for applications
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Elektronisch E-Book |
| Sprache: | English |
| Veröffentlicht: |
Amsterdam
Elsevier Science
2008
|
| Ausgabe: | 1st ed |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Beschreibung: | Gas phase molecular spectroscopy is a powerful tool for obtaining information on the geometry and internal structure of isolated molecules as well as on the interactions that they undergo. It enables the study of fundamental parameters and processes and is also used for the sounding of gas media through optical techniques. It has been facing always renewed challenges, due to the considerable improvement of experimental techniques and the increasing demand for accuracy and scope of remote sensing applications. In practice, the radiating molecule is usually not isolated but diluted in a mixture at significant total pressure. The collisions among the molecules composing the gas can have a large influence on the spectral shape, affecting all wavelength regions through various mechanisms. These must be taken into account for the correct analysis and prediction of the resulting spectra. This book reviews our current experimental and theoretical knowledge and the practical consequences of collisional effects on molecular spectral shapes in neutral gases. General expressions are first given. They are formal of difficult use for practical calculations often but enable discussion of the approximations leading to simplified situations. The first case examined is that of isolated transitions, with the usual pressure broadening and shifting but also refined effects due to speed dependence and collision-induced velocity changes. Collisional line-mixing, which invalidates the notion of isolated transitions and has spectral consequences when lines are closely spaced, is then discussed within the impact approximation. Regions where the contributions of many distant lines overlap, such as troughs between transitions and band wings, are considered next. For a description of these far wings the finite duration of collisions and concomitant breakdown of the impact approximation must be taken into account. Finally, for long paths or elevated pressures, the dipole or polarizability induced by intermolecular interactions can make significant contributions. Specific models for the description of these collision induced absorption and light scattering processes are presented. The above mentioned topics are reviewed and discussed from a threefold point of view: the various models, the available data, and the consequences for applications including heat transfer, remote sensing and optical sounding. The extensive bibliography and discussion of some remaining problems complete the text. . State of the art on the subject . A bibliography of nearly 1000 references . Tools for practical calculations . Consequences for other scientific fields . Numerous illustrative examples . Fulfilling a need since there is no equivalent monograph on the subject Includes bibliographical references (pages 365-407) and index |
| Beschreibung: | 1 Online-Ressource (/ illustrations) |
| ISBN: | 9780080569949 0080569943 1281795712 9781281795717 0444520171 9780444520173 |
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| 500 | |a Gas phase molecular spectroscopy is a powerful tool for obtaining information on the geometry and internal structure of isolated molecules as well as on the interactions that they undergo. It enables the study of fundamental parameters and processes and is also used for the sounding of gas media through optical techniques. It has been facing always renewed challenges, due to the considerable improvement of experimental techniques and the increasing demand for accuracy and scope of remote sensing applications. In practice, the radiating molecule is usually not isolated but diluted in a mixture at significant total pressure. The collisions among the molecules composing the gas can have a large influence on the spectral shape, affecting all wavelength regions through various mechanisms. These must be taken into account for the correct analysis and prediction of the resulting spectra. | ||
| 500 | |a This book reviews our current experimental and theoretical knowledge and the practical consequences of collisional effects on molecular spectral shapes in neutral gases. General expressions are first given. They are formal of difficult use for practical calculations often but enable discussion of the approximations leading to simplified situations. The first case examined is that of isolated transitions, with the usual pressure broadening and shifting but also refined effects due to speed dependence and collision-induced velocity changes. Collisional line-mixing, which invalidates the notion of isolated transitions and has spectral consequences when lines are closely spaced, is then discussed within the impact approximation. Regions where the contributions of many distant lines overlap, such as troughs between transitions and band wings, are considered next. | ||
| 500 | |a For a description of these far wings the finite duration of collisions and concomitant breakdown of the impact approximation must be taken into account. Finally, for long paths or elevated pressures, the dipole or polarizability induced by intermolecular interactions can make significant contributions. Specific models for the description of these collision induced absorption and light scattering processes are presented. The above mentioned topics are reviewed and discussed from a threefold point of view: the various models, the available data, and the consequences for applications including heat transfer, remote sensing and optical sounding. The extensive bibliography and discussion of some remaining problems complete the text. . State of the art on the subject . A bibliography of nearly 1000 references . Tools for practical calculations . Consequences for other scientific fields . Numerous illustrative examples . Fulfilling a need since there is no equivalent monograph on the subject | ||
| 500 | |a Includes bibliographical references (pages 365-407) and index | ||
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Datensatz im Suchindex
| _version_ | 1804152892226011136 |
|---|---|
| any_adam_object | |
| author | Hartmann, Jean-Michel |
| author_facet | Hartmann, Jean-Michel |
| author_role | aut |
| author_sort | Hartmann, Jean-Michel |
| author_variant | j m h jmh |
| building | Verbundindex |
| bvnumber | BV042307197 |
| collection | ZDB-33-ESD ZDB-33-EBS |
| ctrlnum | (OCoLC)272387903 (DE-599)BVBBV042307197 |
| dewey-full | 539.60287 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 539 - Modern physics |
| dewey-raw | 539.60287 |
| dewey-search | 539.60287 |
| dewey-sort | 3539.60287 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| edition | 1st ed |
| format | Electronic eBook |
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| isbn | 9780080569949 0080569943 1281795712 9781281795717 0444520171 9780444520173 |
| language | English |
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| spelling | Hartmann, Jean-Michel Verfasser aut Collisional effects on molecular spectra laboratory experiments and models, consequences for applications Jean-Michel Hartmann, Christian Boulet, Daniel Robert 1st ed Amsterdam Elsevier Science 2008 1 Online-Ressource (/ illustrations) txt rdacontent c rdamedia cr rdacarrier Gas phase molecular spectroscopy is a powerful tool for obtaining information on the geometry and internal structure of isolated molecules as well as on the interactions that they undergo. It enables the study of fundamental parameters and processes and is also used for the sounding of gas media through optical techniques. It has been facing always renewed challenges, due to the considerable improvement of experimental techniques and the increasing demand for accuracy and scope of remote sensing applications. In practice, the radiating molecule is usually not isolated but diluted in a mixture at significant total pressure. The collisions among the molecules composing the gas can have a large influence on the spectral shape, affecting all wavelength regions through various mechanisms. These must be taken into account for the correct analysis and prediction of the resulting spectra. This book reviews our current experimental and theoretical knowledge and the practical consequences of collisional effects on molecular spectral shapes in neutral gases. General expressions are first given. They are formal of difficult use for practical calculations often but enable discussion of the approximations leading to simplified situations. The first case examined is that of isolated transitions, with the usual pressure broadening and shifting but also refined effects due to speed dependence and collision-induced velocity changes. Collisional line-mixing, which invalidates the notion of isolated transitions and has spectral consequences when lines are closely spaced, is then discussed within the impact approximation. Regions where the contributions of many distant lines overlap, such as troughs between transitions and band wings, are considered next. For a description of these far wings the finite duration of collisions and concomitant breakdown of the impact approximation must be taken into account. Finally, for long paths or elevated pressures, the dipole or polarizability induced by intermolecular interactions can make significant contributions. Specific models for the description of these collision induced absorption and light scattering processes are presented. The above mentioned topics are reviewed and discussed from a threefold point of view: the various models, the available data, and the consequences for applications including heat transfer, remote sensing and optical sounding. The extensive bibliography and discussion of some remaining problems complete the text. . State of the art on the subject . A bibliography of nearly 1000 references . Tools for practical calculations . Consequences for other scientific fields . Numerous illustrative examples . Fulfilling a need since there is no equivalent monograph on the subject Includes bibliographical references (pages 365-407) and index SCIENCE / Physics / Atomic & Molecular bisacsh Collision spectroscopy fast Molecular spectroscopy fast Molecular structure fast Molecular spectroscopy Collision spectroscopy Molecular structure Molekülspektroskopie (DE-588)4128850-6 gnd rswk-swf Molekülstruktur (DE-588)4170383-2 gnd rswk-swf Molekülspektroskopie (DE-588)4128850-6 s Molekülstruktur (DE-588)4170383-2 s 1\p DE-604 Boulet, C. Sonstige oth Robert, Daniel Sonstige oth http://www.sciencedirect.com/science/book/9780444520173 Verlag Volltext 1\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk |
| spellingShingle | Hartmann, Jean-Michel Collisional effects on molecular spectra laboratory experiments and models, consequences for applications SCIENCE / Physics / Atomic & Molecular bisacsh Collision spectroscopy fast Molecular spectroscopy fast Molecular structure fast Molecular spectroscopy Collision spectroscopy Molecular structure Molekülspektroskopie (DE-588)4128850-6 gnd Molekülstruktur (DE-588)4170383-2 gnd |
| subject_GND | (DE-588)4128850-6 (DE-588)4170383-2 |
| title | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications |
| title_auth | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications |
| title_exact_search | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications |
| title_full | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications Jean-Michel Hartmann, Christian Boulet, Daniel Robert |
| title_fullStr | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications Jean-Michel Hartmann, Christian Boulet, Daniel Robert |
| title_full_unstemmed | Collisional effects on molecular spectra laboratory experiments and models, consequences for applications Jean-Michel Hartmann, Christian Boulet, Daniel Robert |
| title_short | Collisional effects on molecular spectra |
| title_sort | collisional effects on molecular spectra laboratory experiments and models consequences for applications |
| title_sub | laboratory experiments and models, consequences for applications |
| topic | SCIENCE / Physics / Atomic & Molecular bisacsh Collision spectroscopy fast Molecular spectroscopy fast Molecular structure fast Molecular spectroscopy Collision spectroscopy Molecular structure Molekülspektroskopie (DE-588)4128850-6 gnd Molekülstruktur (DE-588)4170383-2 gnd |
| topic_facet | SCIENCE / Physics / Atomic & Molecular Collision spectroscopy Molecular spectroscopy Molecular structure Molekülspektroskopie Molekülstruktur |
| url | http://www.sciencedirect.com/science/book/9780444520173 |
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