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Contribution A Letude Theorique Des Collisions Electron Molecule A Basse Energie
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Book Synopsis CONTRIBUTION A L'ETUDE THEORIQUE DES COLLISIONS ELECTRON-MOLECULE A BASSE ENERGIE by : Laurence Malegat
Download or read book CONTRIBUTION A L'ETUDE THEORIQUE DES COLLISIONS ELECTRON-MOLECULE A BASSE ENERGIE written by Laurence Malegat and published by . This book was released on 1987 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRAITEMENT DE L'ECHANGE PAR DEVELOPPEMENT SUR UNE BASE L**(2): ETUDE DE LA CONVERGENCE DE LA METHODE ET CRITERES DE CHOIX D'UNE BASE OPTIMALE POUR LES SYSTEMES E-H::(2) ET E-N::(2). MODELISATION DE L'ECHANGE ET DES CORRELATIONS ELECTRONIQUES PAR DES POTENTIELS LOCAUX; EXTENSION DU POTENTIEL D'ECHANGE DE HARA A DES MOLECULES A COUCHES INCOMPLETES (NO,O::(2)). COMBINAISON DE LA METHODE DES ONDES PARTIELLES ADIABATIQUES ET DES MODELISATIONS PRECEDENTES POUR INSTERPRETER LA RESONANCE DE FORME OBSERVEE DANS NO PRES DE 15 EV; EXTENSION AU SYSTEME E-O::(2). ETUDE THEORIQUE DES DISTRIBUTIONS ANGULAIRES RESONNANTES AVEC DES SECTIONS EFFICACES DIFFERENTIELLES, DEPENDANT D'UN SEUL PARAMETRE, POUR L'EXCITATION VIBRATIONNELLE RESONNANTE DE MOLECULES HOMONUCLEAIRES. RESULTATS SEMIQUANTITATIFS OBTENUS POUR L'EXCITATION ELECTRONIQUE DE O::(2) AU-DESSOUS DE 10 EV ET L'EXCITATION VIBRATIONNELLE DE N::(2) A TRAVERS LA RESONANCE DE FORME CENTREE A 22 EV
Book Synopsis CONTRIBUTION A L'ETUDE THEORIQUE DES COLLISIONS ENTRE UN ATOME TRES EXCITE ET UNE PARTICULE NEUTRE (ATOME OU MOLECULE) by : EUGENE.. DE PRUNELE
Download or read book CONTRIBUTION A L'ETUDE THEORIQUE DES COLLISIONS ENTRE UN ATOME TRES EXCITE ET UNE PARTICULE NEUTRE (ATOME OU MOLECULE) written by EUGENE.. DE PRUNELE and published by . This book was released on 1979 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: ANALYSE ET DISCUSSION DES PRINCIPALES APPROCHES THEORIQUES CONCERNANT LES COLLISIONS ENTRE ATOMES DE RYDBERG ET PARTICULES NEUTRES; ETUDE D'IMPLICATIONS IMPORTANTES DES HYPOTHESES FAITES, PAR EXEMPLE DANS LES TRANSFERTS D'ENERGIE EXTREMAUX SELON LA THEORIE DE FLANNERY. PROPOSITION D'UN MODELE SEMI-CLASSIQUE POUR CALCULER LA SECTION EFFICACE TOTALE DE DIFFUSION ENTRE UN ATOME DE RYDBERG A ET UNE PARTICULE NEUTRE B DANS L'HYPOTHESE QUE L'INTERACTION E-B EST A TRES COURTE PORTEE PAR RAPPORT AU RAYON MOYEN DE A. EXPRESSION DE LA PROBABILITE DE COLLISION EN FONCTION DE LA DENSITE DE PROBABILITE DE PRESENCE DE L'ELECTRON ET DE LA SECTION EFFICACE DE DIFFUSION ELECTRON LIBRE-B. ESTIMATION DE LA SECTION EFFICACE DE DIFFUSION ELASTIQUE ET COMPARAISON AUX EXPERIENCES DE DEPOPULATION COLLISION-NULLE TOTALE DE A. EN APPENDICES, 1) ETUDE DES VALEURS MOYENNES ET DISTRIBUTIONS DES VITESSES D'UN ELECTRON DE RYDBERG, ET 2) APPLICATION DU PRINCIPE DE CORRESPONDANTE AUX ETATS DE RYDBERG
Book Synopsis Étude théorique des collisions d'électrons de basse énergie avec des molécules d'intérêt biologique by : Dorra Bouchiha
Download or read book Étude théorique des collisions d'électrons de basse énergie avec des molécules d'intérêt biologique written by Dorra Bouchiha and published by . This book was released on 2007 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to the Theory of Collisions of Electrons with Atoms and Molecules by : S.P. Khare
Download or read book Introduction to the Theory of Collisions of Electrons with Atoms and Molecules written by S.P. Khare and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: An understanding of the collisions between micro particles is of great importance for the number of fields belonging to physics, chemistry, astrophysics, biophysics etc. The present book, a theory for electron-atom and molecule collisions is developed using non-relativistic quantum mechanics in a systematic and lucid manner. The scattering theory is an essential part of the quantum mechanics course of all universities. During the last 30 years, the author has lectured on the topics presented in this book (collisions physics, photon-atom collisions, electron-atom and electron-molecule collisions, "electron-photon delayed coincidence technique", etc.) at many institutions including Wayne State University, Detroit, MI, The University of Western Ontario, Canada, and The Meerut University, India. The present book is the outcome of those lectures and is written to serve as a textbook for post-graduate and pre-PhD students and as a reference book for researchers.
Book Synopsis Contribution à l'étude des opérateurs de collision électron-molécule pour un gaz faiblement ionisé by : Joëlle Lerouvillois-Gaillard
Download or read book Contribution à l'étude des opérateurs de collision électron-molécule pour un gaz faiblement ionisé written by Joëlle Lerouvillois-Gaillard and published by . This book was released on 1971 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron-Molecule Collisions by : Isao Shimamura
Download or read book Electron-Molecule Collisions written by Isao Shimamura and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scattering phenomena play an important role in modern physics. Many significant discoveries have been made through collision experiments. Amongst diverse kinds of collision systems, this book sheds light on the collision of an electron with a molecule. The electron-molecule collision provides a basic scattering problem. It is scattering by a nonspherical, multicentered composite particle with its centers having degrees of freedom of motion. The molecule can even disintegrate, Le., dissociate or ionize into fragments, some or all of which may also be molecules. Although it is a difficult problem, the recent theoretical, experimental, and computational progress has been so significant as to warrant publication of a book that specializes in this field. The progress owes partly to technical develop ments in measurements and computations. No less important has been the great and continuing stimulus from such fields of application as astrophysics, the physics of the earth's upper atmosphere, laser physics, radiation physics, the physics of gas discharges, magnetohydrodynamic power generation, and so on. This book aims at introducing the reader to the problem of electron molecule collisions, elucidating the physics behind the phenomena, and review ing, to some extent, up-to-date important results. This book should be appropri ate for graduate reading in physics and chemistry. We also believe that investi gators in atomic and molecular physics will benefit much from this book.
Book Synopsis Contribution à l'étude des collisions entre particuleslourdes à basse énergie by : Patrice Lefebure
Download or read book Contribution à l'étude des collisions entre particuleslourdes à basse énergie written by Patrice Lefebure and published by . This book was released on 1975 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contribution à l'étude des collisions ionisantes des électrons rapides (5-40 KeV) sur atomes et molécules libres by : Azzedine Lahman Bennani (auteur d'une thèse de sciences.)
Download or read book Contribution à l'étude des collisions ionisantes des électrons rapides (5-40 KeV) sur atomes et molécules libres written by Azzedine Lahman Bennani (auteur d'une thèse de sciences.) and published by . This book was released on 1978 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron-Atom and Electron-Molecule Collisions by : Jürgen Hinze
Download or read book Electron-Atom and Electron-Molecule Collisions written by Jürgen Hinze and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers collected in this volume have been presented during a workshop on "Electron-Atom and Molecule Collisions" held at the Centre for Interdisciplinary Studies of the University of Bielefeld in May 1980. This workshop, part of a larger program concerned with the "Properties and Reactions of Isolated Molecules and Atoms," focused on the theory and computational techniques for the quanti tative description of electron scattering phenomena. With the advances which have been made in the accurate quantum mechanical characterisation of bound states of atoms and molecules, the more complicated description of the unbound systems and resonances important in electron collision processes has matured too. As expli cated in detail in the articles of this volume, the theory for the quantitative explanation of elastic and inelastic electron molecule collisions, of photo- and multiple photon ionization and even for electron impact ionization is well developed in a form which lends itself to a complete quantitative ab initio interpretation and pre diction of the observable effects. Many of the experiences gained and the techniques which have evolved over the years in the com putational characterization of bound states have become an essential basis for this development. To be sure, much needs to be done before we have a complete and detailed theoretical understanding of the known collisional processes and of the phenomena and effects, which may still be un covered with the continuing refinement of the experimental tech niques.
Book Synopsis Etude théorique de phénomènes d'interférences au cours de collisions atomiques et moléculaires by : Nicolas Sisourat
Download or read book Etude théorique de phénomènes d'interférences au cours de collisions atomiques et moléculaires written by Nicolas Sisourat and published by . This book was released on 2008 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Au cours de cette thèse, nous avons mis au point des modèles et des programmes informatiques originaux pour étudier les processus électroniques au cours de collisions entres particules lourdes (ion, atome ou molécule) pour des énergies allant de quelques keV à plusieurs MeV. Nous avons utilisé une approche semi-classique non perturbative, consistant à résoudre l'équation de Schrödinger dépendante du temps (ESDT) pour les électrons du système dans le champ des noyaux en mouvement. Deux types de méthodes ont été développées pour résoudre l'ESDT. La première, totalement numérique, repose sur la méthode des différences finies. La seconde, semi-analytique, consiste à développer la fonction d'onde sur des bases analytiques. Nous avons appliqué ces programmes à l'étude de plusieurs systèmes, en particulier pour la description de l'ionisation d'atomes ou de molécules par impact d'ions, ainsi que pour l'examen des processus biélectroniques lors de collisions ion-atome et ion-molécule.
Book Synopsis Computational Methods for Electron—Molecule Collisions by : Franco A. Gianturco
Download or read book Computational Methods for Electron—Molecule Collisions written by Franco A. Gianturco and published by Springer. This book was released on 2013-07-28 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collision of electrons with molecules and molecular ions is a fundamental pro cess in atomic and molecular physics and in chemistry. At high incident electron en ergies, electron-molecule collisions are used to deduce molecular geometries, oscillator strengths for optically allowed transitions, and in the case of electron-impact ionization, to probe the momentum distribution of the molecule itself. When the incident electron energy is comparable to or below those of the molecular valence electrons, the physics involved is particularly rich. Correlation and exchange effects necessary to describe such collision processes bear a close resemblance to similar efft:cts in the theory of electronic structure in molecules. Compound state formations, in the form of resonances and vir tual states, manifest themselves in experimental observables which provide details of the electron-molecule interactions. Ro-vibrational excitations by low-energy electron collisions exemplify energy transfer between the electronic and nuclear motion. The role of nonadiabatic interaction is raised here. When the final vibrational state is in the continuum, molecular dissociation occurs. Dissociative recombination and dissociative attachment are examples of such fragmentation processes. In addition to its fundamental nature, the study of electron-molecule collisions is also motivated by its relation to other fields of study and by its technological appli cations. The study of planetary atmospheres and the interstellar medium necessarily involve collision processes of electrons with molecules and molecular ions.
Book Synopsis Contribution à l'étude des collisions ionisantes des électrons rapides 5-40 keV sur atomes et molécules libres by : Azzedine Lahmam Bennani
Download or read book Contribution à l'étude des collisions ionisantes des électrons rapides 5-40 keV sur atomes et molécules libres written by Azzedine Lahmam Bennani and published by . This book was released on 1978 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Methods for Electron—Molecule Collisions by : Franco A. Gianturco
Download or read book Computational Methods for Electron—Molecule Collisions written by Franco A. Gianturco and published by Springer. This book was released on 1995-03-31 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collision of electrons with molecules and molecular ions is a fundamental pro cess in atomic and molecular physics and in chemistry. At high incident electron en ergies, electron-molecule collisions are used to deduce molecular geometries, oscillator strengths for optically allowed transitions, and in the case of electron-impact ionization, to probe the momentum distribution of the molecule itself. When the incident electron energy is comparable to or below those of the molecular valence electrons, the physics involved is particularly rich. Correlation and exchange effects necessary to describe such collision processes bear a close resemblance to similar efft:cts in the theory of electronic structure in molecules. Compound state formations, in the form of resonances and vir tual states, manifest themselves in experimental observables which provide details of the electron-molecule interactions. Ro-vibrational excitations by low-energy electron collisions exemplify energy transfer between the electronic and nuclear motion. The role of nonadiabatic interaction is raised here. When the final vibrational state is in the continuum, molecular dissociation occurs. Dissociative recombination and dissociative attachment are examples of such fragmentation processes. In addition to its fundamental nature, the study of electron-molecule collisions is also motivated by its relation to other fields of study and by its technological appli cations. The study of planetary atmospheres and the interstellar medium necessarily involve collision processes of electrons with molecules and molecular ions.
Book Synopsis Contribution à l'étude théorique des collisions élastiques d'électrons très lents avec des surfaces métalliques monocristallines by : Jean-Claude Le Bosse
Download or read book Contribution à l'étude théorique des collisions élastiques d'électrons très lents avec des surfaces métalliques monocristallines written by Jean-Claude Le Bosse and published by . This book was released on 1981 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DU ROLE DE LA BARRIERE DE POTENTIEL EN DIFFRACTION D'ELECTRONS LENTS ET EFFETS DES COLLISIONS ELECTRON-ELECTRON SUR LES DEPHASAGES ATOMIQUES. DETERMINATION DES POTENTIELS INTERVENANT DANS L'HAMILTONIEN DE COUPLAGE ELECTRON-METAL. EXPOSE DES DIFFERENTES METHODES DE CALCUL EXACT DES INTENSITES DIFFRACTEES. INFLUENCE DU POTENTIEL D'ABSORPTION SUR LES DEPHASAGES ATOMIQUES. ETUDE QUALITATIVE DE L'EFFET DYNAMIQUE DE LA BARRIERE DE POTENTIEL DE SURFACE ET EXAMEN QUANTITATIF DANS LE CAS DE AL(100) ET NI(100)
Book Synopsis Contribution à l'étude des collisions ionisantes des électrons rapides (5-40 keV) sur atomes et molécules libres by : Azzeddine Lahmam Bennani
Download or read book Contribution à l'étude des collisions ionisantes des électrons rapides (5-40 keV) sur atomes et molécules libres written by Azzeddine Lahmam Bennani and published by . This book was released on 1978 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude théorique des processus électroniques ayant lieu au cours de collisions atomiques et moléculaires by : Hicham Agueny
Download or read book Etude théorique des processus électroniques ayant lieu au cours de collisions atomiques et moléculaires written by Hicham Agueny and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deux domaines différents de la physique des collisions ont fait l'objet de mes travaux de thèse réalisés dans le cadre d'une cotutelle entre l'Université Moulay Ismail, Meknes-Maroc et l'Université Pierre et Marie Curie, Paris-France: le premier concerne les collisions ion-atome/molécule dans le régime des énergies intermédiaires (keV), alors que le second vise le domaine des collisions électron-atome assistées par un champ laser intense. Bien que distincts, les deux thèmes sont interconnectés puisqu'il s'agit principalement d'étudier, dans des approches non-perturbatives, les phénomènes de diffusion et la dynamique électronique des collisions de cibles atomiques et moléculaires soumis à de fortes et très courtes perturbations. La première partie porte spécifiquement sur la modélisation des processus de transfert électronique et d'ionisation induits lors de collisions d'ions et de cibles atomiques et moléculaires. L'étude porte particulièrement sur les phénomènes d'interférences de type Young, de multi-diffusion et de diffraction Fraunhofer observés au cours de ces processus. La deuxième partie de thèse repose sur une étude des processus de diffusion élastiques et inélastiques induits lors de collisions assistées par un champ laser intense. L'étude s'appuie sur l'analyse spécifique des transitions "libre-libre" au cours lesquelles la cible reste dans son état fondamental après la collision, et des phénomènes de résonance dans le processus d'excitation simultanée électron-photon de la cible.
Book Synopsis Contribution à l'étude des collisions ionsantes des électrons rapides (5-40 KeV) sur atomes et molécules libres montage expérimental et étude de quelques molécules simples by : Lahmam-Bennani Azzeddine
Download or read book Contribution à l'étude des collisions ionsantes des électrons rapides (5-40 KeV) sur atomes et molécules libres montage expérimental et étude de quelques molécules simples written by Lahmam-Bennani Azzeddine and published by . This book was released on 1994 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
