CONTRIBUTION A L'ETUDE THEORIQUE DES COLLISIONS ELECTRON-MOLECULE A BASSE ENERGIE PDF Download
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Author: Laurence Malegat
Publisher:
ISBN:
Category :
Languages : fr
Pages : 185
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Book Description
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
Author: Laurence Malegat
Publisher:
ISBN:
Category :
Languages : fr
Pages : 185
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Book Description
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
Author: EUGENE.. DE PRUNELE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 252
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Book Description
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
Author: Dorra Bouchiha
Publisher:
ISBN: 9780494485330
Category :
Languages : en
Pages : 464
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Book Description
Author: S.P. Khare
Publisher: Springer Science & Business Media
ISBN: 1461506115
Category : Science
Languages : en
Pages : 362
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Book Description
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.
Author: Joëlle Lerouvillois-Gaillard
Publisher:
ISBN:
Category :
Languages : fr
Pages : 94
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Book Description
Author: Isao Shimamura
Publisher: Springer Science & Business Media
ISBN: 1461323576
Category : Science
Languages : en
Pages : 578
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Book Description
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.
Author: Patrice Lefebure
Publisher:
ISBN:
Category :
Languages : fr
Pages : 146
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Book Description
Author: Azzedine Lahman Bennani (auteur d'une thèse de sciences.)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 227
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Book Description
Author: Jürgen Hinze
Publisher: Springer Science & Business Media
ISBN: 1489921486
Category : Science
Languages : en
Pages : 353
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Book Description
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.
Author: Kurt H Becker
Publisher: World Scientific
ISBN: 9814496170
Category :
Languages : en
Pages : 356
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Book Description
Electron-molecule collisions have been studied extensively by both experimentalists and theorists since the early years of this century. The past ten years have seen a remarkable renaissance in experimental and theoretical activities in the study of electron collision processes with molecules. This was stimulated (i) by the advent of more powerful computers and new theoretical concepts that allow the study of complex targets and collision processes with a multitude of final states (such as ionization and dissociation) and the investigation of collisions with oriented and aligned molecules, (ii) by advances in experimental instrumentation (improved electron spectrometers, intense sources of spin-polarized electrons, position-sensitive detectors), and (iii) by the discovery of a new class of species, e.g. large stable carbon clusters or “fullerenes”, which opened up a new field of theoretical and experimental research in which collisions involving fullerenes as targets or as projectiles constitute an important component. Lastly, electron-molecule collisions are a key component in efforts to characterize, diagnose, describe and model the complex processes in low-temperature plasmas, which are of ever-increasing importance in many rapidly developing high-tech applications (such as the fabrication of microelectronic chips), in the controlled deposition of thin films and in plasma-assisted surface-modification processes. This book covers the activities in all those areas.
