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Simulation Numerique Des Processus Dexcitation Et Dionisation De Lion Moleculaire Dhydrogene En Champ Laser Intense
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Book Synopsis Simulation numérique des processus d'excitation et d'ionisation de l'ion moléculaire d'hydrogène en champ laser intense by : Salima Hennani
Download or read book Simulation numérique des processus d'excitation et d'ionisation de l'ion moléculaire d'hydrogène en champ laser intense written by Salima Hennani and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Nous présentons dans ce document une étude théorique d'un ion moléculaire diatomique à un électron en interaction avec un champ laser intense. Nous établissons tout d'abord une méthode basée sur les fonctions B-splines permettant de calculer avec précision la structure énergétique totale d'un ion moléculaire homonucléaire ou hétéronucléaire à un seul électron en absence de champ laser. Nous résolvons ensuite numériquement l'équation de Schrödinger dépendante du temps par une approche spectrale pour décrire l'interaction entre l'ion moléculaire H+2 et un champ laser. À l'aide de notre méthode, nous étudions dans un premier temps le processus d'ionisation au-dessus du seuil dans H+2 à différentes intensités lasers. Dans un second temps, nous étudions les processus d'ionisation et d'excitation de l'ion H+2 soumis à une impulsion laser à dérive de fréquence. Nous montrons plus particulièrement l'influence de la dérive de fréquence laser sur le transfert de population de l'état fondamental vers les états liés mis en jeu."-- Sommaire.
Book Synopsis Simulation numérique des processus d'excitation et d'ionisation des systèmes moléculaires à plusieurs électrons en champ laser intense by : Salima Hennani
Download or read book Simulation numérique des processus d'excitation et d'ionisation des systèmes moléculaires à plusieurs électrons en champ laser intense written by Salima Hennani and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Étude théorique de l'interaction de l'ion moléculaire HeH2+ avec une impulsion laser intense et brève by : Karima Guessaf
Download or read book Étude théorique de l'interaction de l'ion moléculaire HeH2+ avec une impulsion laser intense et brève written by Karima Guessaf and published by . This book was released on 2013 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans ce document, nous allons nous intéresser aux processus d'ionisation et d'excitation de l'ion moléculaire HeH2+ lors de son interaction avec un champ laser intense et bref.
Book Synopsis Ionisation de l'ion moléculaire d'hydrogène H2+ en champ laser intense et bref by : Samira Barmaki
Download or read book Ionisation de l'ion moléculaire d'hydrogène H2+ en champ laser intense et bref written by Samira Barmaki and published by . This book was released on 2004 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nous avons présenté une étude théorique de la dynamique des processus multiphotoniques lors de l'interaction de l'ion moléculaire d'hydrogène H2+ avec un champ laser intense et de courte durée. Dans un premier temps, nous avons décrit, dans l'approximation de Born Oppenheimer, une méthode de calcul de la structure électronique et vibrationnelle de H2+ basée sur l'utilisation de fonctions B-splines. Nous avons ensuite présenté des résultats de sections efficaces d'ionisation de l'ion en présence d'un champ de faible éclairement et de longue durée d'impulsion, obtenus par un traitement perturbatif de l'interaction. Enfin, nous avons étudié la dynamique de H2+ soumis à un champ laser de fort éclairement et de courte durée en résolvant l'équation de Schrödinger dépendante du temps avec une méthode spectrale, ce qui nous a conduit au calcul des distributions énergétiques des fragments issus de la dissociation et de l'ionisation de l'ion moléculaire.
Book Synopsis DYNAMIQUE DES SYSTEMES ATOMIQUES COMPLEXES EN CHAMP LASER INTENSE by : DAVID.. CHARLO
Download or read book DYNAMIQUE DES SYSTEMES ATOMIQUES COMPLEXES EN CHAMP LASER INTENSE written by DAVID.. CHARLO and published by . This book was released on 1999 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS DEVELOPPE LA THEORIE R-MATRICE-FLOQUET POUR L'ETUDE DES COLLISIONS ELECTRON-ATOME EN CHAMP LASER INTENSE. LA METHODE EST AB INITIO ET NON-PERTURBATIVE, TRAITE EXPLICITEMENT L'ECHANGE ENTRE LES ELECTRONS ET INCLUT UNE DESCRIPTION DE LA CIBLE HABILLEE PAR LES PHOTONS. LA THEORIE A ETE MISE EN UVRE SOUS FORME D'UNE GRANDE CHAINE DE PROGRAMMES GENERAUX ADAPTES AUX ORDINATEURS PARALLELES. NOUS AVONS D'ABORD ETUDIE LA DIFFUSION ELASTIQUE ELECTRON-HYDROGENE ET ELECTRON-HELIUM EN CHAMP LASER CO 2 ( = 10 640 NM) POUR DES INTENSITES ENTRE 1.2 10 5 ET 1.2 10 7 W/CM 2, A BASSE ENERGIE DE COLLISION ET DANS LA GEOMETRIE OU L'ELECTRON EST INCIDENT SUIVANT L'AXE DE POLARISATION DU CHAMP. NOUS AVONS EGALEMENT REALISE DES CALCULS EXACTS DANS LE CAS OU LA CIBLE EST MODELISEE PAR UN POTENTIEL CENTRAL. NOUS MONTRONS QUE LA POLARISATION DE LA CIBLE ATOMIQUE PAR L'ELECTRON COLLISIONNEL ET L'ECHANGE ONT PEU D'EFFETS SUR LES SECTIONS EFFICACES. NOS RESULTATS SONT EN BON ACCORD AVEC LES PREDICTIONS DE LA FORMULE DE L'APPROXIMATION BASSE FREQUENCE (ABF) (KROLL ET WATSON 1973). LES TRES GRANDES VALEURS MESUREES PAR WALLBANK ET HOLMES (1993, 1994) AUX PETITS ANGLES DE DIFFUSION DEMEURENT INEXPLIQUEES. NOUS AVONS ENSUITE ETUDIE L'EXCITATION A BASSE ENERGIE DES QUATRE PREMIERS ETATS EXCITES DE L'HELIUM PAR IMPACT SIMULTANE D'ELECTRON ET DE PHOTONS EN PRESENCE D'UN CHAMP LASER CO 2 (I = 10 8 W/CM 2) OU ND : YAG ( = 1 064 NM, I = 10 1 0 W/CM 2). NOS RESULTATS METTENT EN EVIDENCE DES STRUCTURES ADDITIONNELLES INDUITES PAR LE CHAMP LASER DANS LES SECTIONS EFFICACES D'EXCITATION. EN CHAMP LASER CO 2, NOS CALCULS RENDENT COMPTE DU CARACTERE FORTEMENT NON-PERTURBATIF DU PROCESSUS ET CONFIRMENT LA VALIDITE DE LA THEORIE ABF. ILS SONT PAR AILLEURS EN BON ACCORD QUALITATIF AVEC LES DONNEES EXPERIMENTALES DE WALLBANK ET AL. (1989). EN CHAMP LASER ND : YAG, NOUS MONTRONS QUE LA RESONANCE 2S E (1S2S 2) DE L'ION HE JOUE UN ROLE ESSENTIEL DANS L'EXPLICATION DE LA FORME DU SIGNAL ENREGISTRE PAR LUAN ET AL. (1991).
Book Synopsis Neutral dissociation of superexcited molecules in a strong laser field by : Ali Azarm
Download or read book Neutral dissociation of superexcited molecules in a strong laser field written by Ali Azarm and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SOME ADVANCEMENT IN IONIZATION OF ATOMS AND MOLECULES IN INTERMEDIATE INTENSITY REGIME USING ULTRA-FAST LASER PULSES. by : Seyed Mehdi Sharifi Kalahroudi
Download or read book SOME ADVANCEMENT IN IONIZATION OF ATOMS AND MOLECULES IN INTERMEDIATE INTENSITY REGIME USING ULTRA-FAST LASER PULSES. written by Seyed Mehdi Sharifi Kalahroudi and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Excitation et ionisation des atomes d'hydrogène et d'hélium par des impulsions laser femtosecondes by : Roland Guichard
Download or read book Excitation et ionisation des atomes d'hydrogène et d'hélium par des impulsions laser femtosecondes written by Roland Guichard and published by . This book was released on 2007 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nous présentons une approche théorique fondée sur des états de « Coulomb-Volkov » bien adaptée à l'étude des processus multiphotoniques atomiques induits par un laser XUV femtoseconde intense. Elle prédit les spectres d'ionisation de l'hydrogène quand l'impulsion incidente reste en conditions de perturbation. Trois voies sont explorées dans ce manuscrit. L'extension à des champs intenses quand ħω > Ip : il est nécessaire de prendre en compte la population de l'état initial de l'hydrogène, en l'introduisant dans une amplitude Coulomb-Volkov standard, on décrit l'ionisation multiphotonique quasi-saturée. L'extension aux transitions multiphotoniques avec ħω
Book Synopsis IONISATION MULTIPLE DES MOLECULES DIATOMIQUES EN CHAMP LASER INTENSE by : JOSE.. LAVANCIER
Download or read book IONISATION MULTIPLE DES MOLECULES DIATOMIQUES EN CHAMP LASER INTENSE written by JOSE.. LAVANCIER and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE EST CONSACREE A L'ETUDE EXPERIMENTALE DES INTERACTIONS ENTRE LES MOLECULES DIATOMIQUES ET LE RAYONNEMENT LASER INTENSE. L'ACCENT EST MIS SUR L'INFLUENCE DES PARAMETRES QUI CARACTERISENT LES IMPULSIONS LASER. POUR CELA, LES EXPERIENCES SONT EFFECTUEES DANS UNE LARGE GAMME D'ECLAIREMENT ET POUR DIFFERENTES LONGUEURS D'ONDE ET DUREES D'IMPULSIONS. L'INTERACTION PRODUIT UNE GRANDE VARIETE D'IONS ATOMIQUES ET MOLECULAIRES DONT L'ORIGINE EST DETERMINEE PAR L'ANALYSE DETAILLEE DES SPECTRES DE MASSE. A FORT ECLAIREMENT, ON OBSERVE DEUX MECANISMES D'EXCITATION QUI DEPENDENT DE LA MOLECULE ET DE LA LONGUEUR D'ONDE: 1) SOIT L'INTERACTION NE PEUPLE QUE DES ETATS EXCITES DE L'ION DOUBLEMENT CHARGE, CE PROCESSUS S'EFFECTUANT SANS MODIFICATION DE LA DISTANCE INTERNUCLEAIRE; 2) SOIT LA MOLECULE PERD CINQ ELECTRONS ET PEUT SE DISSOCIER SELON DIVERS CANAUX. ON CONSTATE ALORS QUE LA STRUCTURE MOLECULAIRE GOUVERNE LES DEUX PREMIERES ETAPES D'IONISATION MAIS SEMBLE PEU INFLUENTE LORS DES DERNIERES ETAPES. NOS RESULTATS S'INTERPRETENT A PARTIR DE L'HYPOTHESE D'UNE SEQUENCE D'IONISATION MULTIPLE A DES DISTANCES INTERNUCLEAIRES CROISSANTES. CE SONT ALORS LES ETATS DOUBLEMENT CHARGES QUI INITIALISENT LA REACTION EN SE DISSOCIANT PENDANT L'APPLICATION DE L'IMPULSION LASER. LA THEORIE DE L'IONISATION PAR CHAMP DONNE UNE ESTIMATION DES DISTANCES INTERNUCLEAIRES D'IONISATION ET DES ECLAIREMENTS D'APPARITION DES VOIES DISSOCIATIVES OBSERVEES
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji
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.
Book Synopsis Guide to Nuclear Power Cost Evaluation: Equipment costs by : Kaiser Engineers
Download or read book Guide to Nuclear Power Cost Evaluation: Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Clinical Chronopharmacology by : Alain Reinberg
Download or read book Clinical Chronopharmacology written by Alain Reinberg and published by CRC Press. This book was released on 1990-07 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodical and predictable changes in biological susceptibility and response to a large variety of chemical agents, including drugs and food, have been documented since the early 1970s. This book provides a survey of clinically-documented research in chronopharmacology.
Book Synopsis Serial Reports on Start-up Experiments by : J. Chernick
Download or read book Serial Reports on Start-up Experiments written by J. Chernick and published by . This book was released on 1955 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Confronting Poverty in Iraq by : World Bank
Download or read book Confronting Poverty in Iraq written by World Bank and published by World Bank Publications. This book was released on 2011-01-10 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides the most comprehensive and rigorous analysis of Iraqi income and expenditure in several decades. The report makes extensive use of the Iraq Household Socio-Economic Survey, the first nationwide income and expenditure survey since 1988. IHSES data is complemented income and expenditure data from a wide range of other measures of living standards, allowing us to analyze living standards in a holistic way. The analysis presented here was performed with two main goals first, to inform the Government s Poverty Reduction Strategy; and second, to serve as a baseline for future assessments of changes in living standards and the identification of critical issues for deeper examination. Iraqi living standards have two unusual characteristics. First, they have fallen over the past generation. Second, they feature surprisingly little inequality. These characteristics are both rooted in Iraq s recent history of authoritarian government, war, military occupation, insurgency, and civil strife leading to infrastructure destruction and population displacement. There have been few opportunities for individuals to prosper from professional or entrepreneurial activities. Decades of neglected investment have resulted in deterioration of social services and economic infrastructure. Consequently, individuals have lacked capabilities to prosper and an investment climate conducive to prosperity. School enrollment and life expectancy have declined. Extremely low returns to education reflect the combination of poor educational quality and lack of employment opportunities. In terms of economic infrastructure, access to reliable electricity and water, and even access to paved roads are low, are further reflections of decades of neglect. While the upper end of the distribution has been pulled down by a lack of opportunities, the lower end has been supported by direct government provision of food. The Public Distribution System (PDS) provides 85 percent of food needs. While PDS has been useful as a safety net for the poor and the vulnerable, the system is expensive, inefficient, and fiscally risky. Indeed, PDS food rations account for a far greater share of public spending than does education or health. Going forward, Iraq faces two main challenges. First, although Iraq does not have to develop from scratch, it faces a formidable challenge in re-development. Second, a shift by the Government is required from direct provision of basic subsistence toward investment in human capacities. The Government can provide an enabling environment through investments in economic infrastructure and services to business and citizens, thus allowing the population to make productive use of education and their own labor. Both challenges are now being taken up by the Poverty Reduction Strategy, which articulates a detailed set of required actions and outlines priorities for government spending.
Book Synopsis Minimum competence in scientific English by : Sue Blattes
Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.
Book Synopsis Conceptual Modeling for Traditional and Spatio-Temporal Applications by : Christine Parent
Download or read book Conceptual Modeling for Traditional and Spatio-Temporal Applications written by Christine Parent and published by Springer Science & Business Media. This book was released on 2006-09-02 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: From environmental management to land planning and geo-marketing, the number of application domains that may greatly benefit from using data enriched with spatio-temporal features is expanding very rapidly. This book shows that a conceptual design approach for spatio-temporal databases is both feasible and easy to apprehend. While providing a firm basis through extensive discussion of traditional data modeling concepts, the major focus of the book is on modeling spatial and temporal information.
