Download or read book ETUDE THEORIQUE DE COLLISIONS ELECTRON ATOME EN PRESENCE DE RAYONNEMENT ELECTROMAGNETIQUE written by PHILIPPE.. MARTIN and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE THEORIQUE DE DEUX TYPES DE PROCESSUS RADIATIFS MIS EN EVIDENCE AU COURS DES COLLISIONS D'ELECTRONS RAPIDES SUR DES CIBLES ATOMIQUES. IDENTIFICATION DES RAIES D'EMISSION X DU SPECTRE 3D4F, OBTENUES EXPERIMENTALEMENT DANS DES COMPOSES SOLIDES DE LANTHANE, DE BARYUM ET DE CESIUM SOUMIS A L'IMPACT ELECTRONIQUE DE HAUTE ENERGIE PAR LE PROGRAMME MCDF DE GRANT. PROPOSITION D'UNE DESCRIPTION THEORIQUE DE L'ACTION DU RAYONNEMENT D'UNE SOURCE LASER INTENSE SUR LA DYNAMIQUE DE L'IONISATION PAR IMPACT ELECTRONIQUE D'UNE CIBLE D'HYDROGENE ATOMIQUE

Download or read book COLLISIONS ELECTRON ATOME D HYDROGENE EN PRESENCE DE RAYONNEMENT ELECTROMAGNETIQUE written by Alain Dubois and published by . This book was released on 1987 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: CALCULS ANALYTIQUES ET NUMERIQUES DES AMPLITUDES ET SECTIONS EFFICACES DES TRANSITIONS LIBRE-LIBRE LORS DE COLLISIONS D'ELECTRONS RAPIDES AVEC DES ATOMES H EN PRESENCE D'UN RAYONNEMENT LASER (BREMSSTRAHLUNG INVERSE OU STIMULE) OU NON (BREMSSTRAHLUNG) EN SE PLACANT DANS L'APPROXIMATION DIPOLAIRE POUR LE CHAMP ELECTROMAGNETIQUE ET DANS LA 1ERE APPROXIMATION DE BORN POUR LES PROJECTILES, DANS LE CADRE DE LA THEORIE DES PERTURBATIONS. PRESENCE DE MINIMUMS DANS LES SECTIONS EFFICACES DES PROCESSUS STIMULES

Download or read book Collisions of Electrons with Atoms and Molecules written by G.F. Drukarev and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a short outline of the present state of the theory of electron collisions with atomic particles - atoms, molecules and ions. It is addressed to those who by nature of their work need detailed information about the cross sections of various processes of electron collisions with atomic particles: experimentalists working in plasma physics, optics, quantum electronics, atmospheric and space physics, 'etc. Some of the cross sections have been measured. But in many important cases the only source of information is theoretical calcu lation. The numerous theoretical papers dealing with electronic collision processes contain various approximations. The inter relation between them and the level of their accuracy is often diffi cult to understand without a systematic study of the theory of atomic collisions, not to mention that theoretical considerations are necessary for the consistent interpretation of experimental results. The main constituents of the book are: 1. General theory with special emphasis on the topics most impor tant for understanding and discussing electron collisions with atomic particles.

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.

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

Download or read book Etude th orique des processus lectroniques ayant lieu au cours de collisions atomiques et mol culaires 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.

Download or read book Introduction to the Theory of Collisions of Electrons with Atoms and Molecules written by Khare Satya Prakash and published by Springer. This book was released on 2013-03-26 with total page 353 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.

Download or read book COLLISIONS IONISANTES DU SYSTEME HE 2 1 S 2 3 S HE 1 1 S EN PRESENCE D UN CHAMP ELECTROMAGNETIQUE INTENSE written by JEAN.. HEUZE and published by . This book was released on 1985 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE EXPERIMENTALE DE CES COLLISIONS IONISANTES EN PRESENCE D'UN FLUX LASER DE L'ORDRE DE 10**(7) WCM**(-2), LES COLLISIONS ETANT ASSISTEES PAR UN PHOTON D'ENERGIE 3,49 EV (355 NM). ANALYSE DU SIGNAL IONIQUE EN FONCTION DU TEMPS D'INTERACTION POUR DES ENERGIES DE COLLISION DE L'ORDRE DE 50 EV DANS LE SYSTEME DU CENTRE DE MASSE

Download or read book tude th orique de la dynamique lectronique au cours de collisions entre des ions et des cibles atomiques hautement excit es written by Abdelmalek Taoutioui and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La compréhension des processus électroniques ayant lieu au cours de collisions atomiques présente un intérêt important pour la modélisation de phénomènes observés dans des systèmes complexes tels que les milieux atmosphériques, astrophysiques et biologiques. Ces processus se manifestent au niveau microscopique mais jouent un rôle déterminant sur l'évolution et les propriétés physico-chimiques de ces systèmes macroscopiques. D'un point de vue fondamental, les collisions sont également des "laboratoires" privilégiés pour l'étude de systèmes quantiques à N-corps. Les collisions ion-atome sont d'une importance cruciale dans plusieurs domaines tels que celui concernant la fusion nucléaire par confinement magnétique : la compréhension des processus électroniques est nécessaire pour la modélisation de ce type de plasmas. Cette thèse se situe dans ce contexte et est dédiée à l'étude théorique des processus électroniques qui se manifestent au cours de collisions entre des ions et des cibles atomiques hautement excitées. Dans ce travail, nous avons privilégié la modélisation de la capture électronique et le calcul des sections efficaces pour le système proton-hydrogène. Nous avons adopté deux approches théoriques non perturbatives : la méthode classique CTMC et une méthode semi-classique SCAOCC. Nous avons calculé les sections efficaces totales et partielles de capture pour des cibles excitée initialement jusqu'à la couche n=7. Des comparaisons entre les résultats issus de ces méthodes et les quelques données théoriques disponibles sont réalisées et représentent l'originalité du travail. Des lois d'échelle empiriques pour les sections efficaces totales sont également décrites.

Download or read book Etude th orique et exp rimentale de quelques processus de transfert quasi r sonnant de l excitation par collisions en phase vapeur written by Jean-Claude Gay and published by . This book was released on 1976 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE THEORIQUE EN EXPLOITANT LES PROPRIETES DE SYMETRIE DES MATRICES DE COLLISION ET DE RELAXATION: MISE EN EVIDENCE D'UNE RELAXATION ANISOTROPE POUR LES COLLISIONS EN CHAMP MAGNETIQUE INTENSE; TRAITEMENT SEMI-CLASSIQUE A TRAJECTOIRES RECTILIGNES DES COLLISIONS RESONNANTES EN CHAMP INTENSE POUR UNE TRANSITION J=1->0 (TRANSFERT DE POPULATION ENTRE SOUS-NIVEAUX ZEEMAN DES DEUX ATOMES, ELARGISSEMENT ET DEPLACEMENT DES RAIES OPTIQUES ET DE RESONANCE MAGNETIQUE) ET DES COLLISIONS ATOME-PERTURBATEUR; TRAITEMENT EXACT SEMI-CLASSIQUE DES COLLISIONS QUASI RESONNANTES ENTRE DEUX ISOTOPES; TRAITEMENT ASYMPTOTIQUE DES COLLISIONS RESONNANTES EN CHAMP INTENSE. ETUDE EXPERIMENTALE DANS DES CHAMPS DE 80 ET 200 KG: COLLISIONS QUASI RESONNANTES HG*(6**(3)P::(1))-HG(6**(1)S::(0)), NON RESONNANTES HG*(6**(3)P::(1))-GAZ RARE, RESONNANTES NA*(3**(2)P::(1/2))-NA(**(2)S::(1/2)) ET NON RESONNANTES NA*(3**(2)P)-GAZ RARE. DISCUSSION DES PHENOMENES DE DIFFUSION MULTIPLE.

Download or read book Etude th orique des processus lectroniques au cours de collisions ion atome et ion mol cule written by Jérémie Caillat and published by . This book was released on 2003 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude th orique de ph nom nes d interf rences au cours de collisions atomiques et mol culaires 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.

Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Download or read book Applied Optics written by and published by . This book was released on 1962 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports on experimental and applied research in the optical technology industry. Covers topics such as electro-optics and lasers, optical engineering, quantum electronics, and optical probing and remote sensing from the extreme ultraviolet to the far infrared. Published in three monthly divisions: Optical technology and biomedical optics, Information processing, and Lasers, photonics, and environmental optics. Includes patents.

Download or read book Fusion Nucl aire written by and published by . This book was released on 1962 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Solvay Councils and the Birth of Modern Physics written by Pierre Marage and published by Birkhäuser. This book was released on 2013-11-11 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: FOREWORD This book came about as a result of two events: an exhibition on the Solvay Physics Councils, held in Brussels in May 1995, and a conference on the same theme which took place at the Free University of Brussels (ULB) on May 1Oth 1995. A book was published in French in conjunction with the exhibition, and much of the present publication is taken from that book. In addition, we have included some of the papers presented at the conference, as we believe they add a further dimension to the history of the Councils. The French term, Conseil Solvay, is usually translated into English as Solvay Conference or Congress. We have elected to retain the particular connotations of the French word Conseil by translating it instead as Council. The Councils were, after all, no ordinary conferences. Only a limited number of participants was invited, hand picked by a scientific committee, who for five to six days took an active part in the sessions and the long discussions that followed. Each day, one or two physicists would present a paper on a subject that had been chosen by the committee to fit in with the overall theme of the Council. The word Conseil expressly implies the gathering of an elite to engage in debate.

Download or read book Atoms written by Jean Perrin and published by Franklin Classics. This book was released on 1916 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: