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Book Description
CETTE THESE EST CONSACREE AU TRANSFERT D'ELECTRONS ENTRE LA SURFACE D'UN SOLIDE ET DES PARTICULES DIFFUSEES (EJECTEES). ON UTILISE LE FORMALISME DU HAMILTONIEN DE ANDERSON-NEWNS QUI CONDUIT DANS CERTAINS CAS A UNE EQUATION D'ETAT SEMI-CLASSIQUE REGISSANT L'EVOLUTION DES POPULATIONS. LA FORMATION D'ETATS EXCITES DE L'ION SILICIUM: SI#+#*4P(2PO) ET 4F(2FO) LORS DE LA PULVERISATION DE SI PAR IMPACT D'IONS AR#+ EST ETUDIEE. LA PRISE EN COMPTE D'UNE DENSITE D'ETATS DE SURFACE REALISTE CONDUIT A UN SPECTRE EN ENERGIE DES IONS EJECTES PRESENTANT DES OSCILLATIONS, EN ACCORD AVEC L'EXPERIENCE. LES EFFETS DE TRAJECTOIRES SONT PRESENTES, ILS MODIFIENT DE MANIERE SIGNIFICATIVE A BASSE ENERGIE LA DISTRIBUTION EN ANGLE ET EN ENERGIE DES IONS EJECTES. LA METHODE NON PERTURBATIVE DES MODES ANGULAIRES COUPLES (CAM) EST APPLIQUEE AU CALCUL DES CARACTERISTIQUES DES NIVEAUX DE H#-, H ET HE#+ PLACES DEVANT UNE SURFACE D'AL: POSITIONS, LARGEURS ET DISTRIBUTIONS ANGULAIRES DES ELECTRONS EJECTES. DANS LE CAS DE H ET HE#+, DE TRES FORTES HYBRIDATIONS SONT OBSERVEES. LES DONNEES SUR L'ION H#- SONT UTILISEES POUR UN TRAITEMENT DYNAMIQUE DE LA FORMATION DE H#- LORS DE COLLISIONS RASANTES D'H SUR AL. LES RESULTATS EN SONT EN BON ACCORD AVEC L'EXPERIENCE. LA METHODE CAM A AUSSI ETE UTILISEE POUR L'ETUDE DE L'ION HE#- (1S2S#2 #2S) DEVANT UNE SURFACE METALLIQUE. LES LARGEURS PARTIELLES ASSOCIEES AUX DIFFERENTS CANAUX DE FORMATION (DESTRUCTION) SONT OBTENUES ET PERMETTENT LE TRAITEMENT DYNAMIQUE DE LA CONVERSION SINGULET-TRIPLET D'ATOMES D'HELIUM METASTABLES SUR UNE SURFACE A FAIBLE TRAVAIL DE SORTIE
Book Description
CETTE THESE EST CONSACREE AU TRANSFERT D'ELECTRONS ENTRE LA SURFACE D'UN SOLIDE ET DES PARTICULES DIFFUSEES (EJECTEES). ON UTILISE LE FORMALISME DU HAMILTONIEN DE ANDERSON-NEWNS QUI CONDUIT DANS CERTAINS CAS A UNE EQUATION D'ETAT SEMI-CLASSIQUE REGISSANT L'EVOLUTION DES POPULATIONS. LA FORMATION D'ETATS EXCITES DE L'ION SILICIUM: SI#+#*4P(2PO) ET 4F(2FO) LORS DE LA PULVERISATION DE SI PAR IMPACT D'IONS AR#+ EST ETUDIEE. LA PRISE EN COMPTE D'UNE DENSITE D'ETATS DE SURFACE REALISTE CONDUIT A UN SPECTRE EN ENERGIE DES IONS EJECTES PRESENTANT DES OSCILLATIONS, EN ACCORD AVEC L'EXPERIENCE. LES EFFETS DE TRAJECTOIRES SONT PRESENTES, ILS MODIFIENT DE MANIERE SIGNIFICATIVE A BASSE ENERGIE LA DISTRIBUTION EN ANGLE ET EN ENERGIE DES IONS EJECTES. LA METHODE NON PERTURBATIVE DES MODES ANGULAIRES COUPLES (CAM) EST APPLIQUEE AU CALCUL DES CARACTERISTIQUES DES NIVEAUX DE H#-, H ET HE#+ PLACES DEVANT UNE SURFACE D'AL: POSITIONS, LARGEURS ET DISTRIBUTIONS ANGULAIRES DES ELECTRONS EJECTES. DANS LE CAS DE H ET HE#+, DE TRES FORTES HYBRIDATIONS SONT OBSERVEES. LES DONNEES SUR L'ION H#- SONT UTILISEES POUR UN TRAITEMENT DYNAMIQUE DE LA FORMATION DE H#- LORS DE COLLISIONS RASANTES D'H SUR AL. LES RESULTATS EN SONT EN BON ACCORD AVEC L'EXPERIENCE. LA METHODE CAM A AUSSI ETE UTILISEE POUR L'ETUDE DE L'ION HE#- (1S2S#2 #2S) DEVANT UNE SURFACE METALLIQUE. LES LARGEURS PARTIELLES ASSOCIEES AUX DIFFERENTS CANAUX DE FORMATION (DESTRUCTION) SONT OBTENUES ET PERMETTENT LE TRAITEMENT DYNAMIQUE DE LA CONVERSION SINGULET-TRIPLET D'ATOMES D'HELIUM METASTABLES SUR UNE SURFACE A FAIBLE TRAVAIL DE SORTIE
Book Description
CE TRAVAIL DE THESE A PORTE SUR L'ETUDE DU TRANSFERT DE CHARGE RESONANT ENTRE UN ATOME ET UNE SURFACE METALLIQUE. EN PARTICULIER, ONT ETE ETUDIES DES SYSTEMES (ATOMIQUES ET MOLECULAIRES) COMPLEXES A COUCHE ELECTRONIQUE OUVERTE COMME L'OXYGENE ET L'AZOTE ET LES DIFFERENTS EFFETS MULTIELECTRONMULTIETAT ASSOCIES: L'IMPLICATION DANS LE TRANSFERT DE CHARGE DE TOUS LES ETATS DE L'ATOME NEUTRE ET DE L'ION NEGATIF, LE FORT EFFET DE POLARISATION, L'EXISTENCE DU PROCESSUS DE DESEXCITATION VIA LA FORMATION D'UN ION NEGATIF. CETTE THESE CONTRIBUE AUSSI A L'ANALYSE DU ROLE DE LA PRESENCE D'ALCALINS ADSORBES SUR LA SURFACE SUR LE TRANSFERT DE CHARGE: L'EFFET NON LOCAL DES ADSORBATS (PAR LA VARIATION DU TRAVAIL DE SORTIE MACROSCOPIQUE) SUR LA PROBABILITE DE SURVIE DES IONS NEGATIFS PULVERISES A ETE ETUDIE DANS LE CAS DU SYSTEME O#-/AL ET LES RESULTATS THEORIQUES ONT ETE EN TRES BON ACCORD AVEC LES RESULTATS EXPERIMENTAUX ; L'EFFET NON LOCAL ET LOCAL (LA FORTE PERTURBATION DU TRANSFERT DE CHARGE AUX ALENTOURS DE L'ADSORBAT) ONT ETE ETUDIES DANS LE CAS DU SYSTEME N#--LI/AL, JUSTIFIANT AINSI QUANTITATIVEMENT L'OBSERVATION EXPERIMENTALE D'IONS N#-(#1D) FORMES PAR COLLISION SUR UNE SURFACE A ADSORBAT. ON A ETUDIE L'EXCITATION ELECTRONIQUE PAR IMPACT ELECTRONIQUE DE LA MOLECULE DE O#2 PHYSISORBEE SUR UNE SURFACE (TRANSITIONS INTERDITES PAR LE SPIN) ET LES DIFFERENTS EFFETS DUS A LA GEOMETRIE D'ADSORPTION ET A LA SYMETRIE MOLECULAIRE ONT ETE ANALYSES
Author: John T. Jefferies Publisher: ISBN: Category : Astronomical spectroscopy Languages : en Pages : 328
Book Description
The purpose of this book is to discuss certain aspects of the theory of the formation and analysis of the line spectrum of a hot gas. The underlying motivation for most of the studies discussed here lies in a desire to develop a physically sound procedure for interpreting the line spectrum of a stellar atmosphere ; correspondingly, the major emphasis is given to problems encountered in astrophysics.
Author: Claude Cohen-Tannoudji Publisher: John Wiley & Sons ISBN: 3527345558 Category : Science Languages : en Pages : 790
Book Description
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.
Author: Olivier Ouari Publisher: Royal Society of Chemistry ISBN: 1788019660 Category : Science Languages : en Pages : 611
Book Description
Nitroxides are versatile small organic molecules possessing a stabilised free radical. With their unpaired electron spin they display a unique reactivity towards various environmental factors, enabling a diverse range of applications. They have uses as synthetic tools, such as catalysts or building blocks; imaging agents and probes in biomedicine and materials science; for medicinal antioxidant applications; and in energy storage. Polynitroxides (polymers bearing pendant nitroxide sidechains) have been used in organic radical batteries, oxidation catalysts and in exchange reactions for constructing complex architectures. Chapters in this book cover the synthesis of nitroxides, EPR studies and magnetic resonance applications, physiochemical studies, and applications including in batteries, imaging and organic synthesis. With contributions from leaders in the field, Nitroxides will be of interest to graduate students and researchers across chemistry, physics, biology and materials science.
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
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.
Author: Nickolai Kocherginsky Publisher: CRC Press ISBN: 9780849342042 Category : Science Languages : en Pages : 286
Book Description
Extending the use of nitroxides as probes into more complex systems such as viable cells and whole animals requires greater knowledge of their interactions in functioning biological systems and appropriate model systems. Nitroxide Spin Labels: Reactions in Biology and Chemistry presents information essential for research in this area. Nitroxide research offers the promise of important new ways of measuring metabolism and will be useful in the diagnosis of important disease categories such as cancer, inflammation, and ischemia.
Author: ANDREI.. BORISOV
Author: ANDREI.. BORISOV
Author: BOGDANA.. BAHRIM GAVRILA
Author: John T. Jefferies
Author: OECD Nuclear Energy Agency
Author: Claude Cohen-Tannoudji
Author: O. Vallée
Author: Olivier Ouari
Author: 
Author: Ahmed Belasri
Author: Nickolai Kocherginsky