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Author: Eric Charron
Publisher:
ISBN:
Category :
Languages : fr
Pages : 151
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Book Description
LA METHODE DU CONTROLE COHERENT D'UNE REACTION EST BASEE SUR LA SUPERPOSITION DE DEUX HARMONIQUES D'UN MEME LASER, AVEC UN DEPHASAGE CONSTANT ENTRE ELLES. CECI GENERE DES EFFETS D'INTERFERENCE QUI PERMETTENT DE FAVORISER UN CHEMIN REACTIONNEL DANS UN PROCESSUS MULTIVOIES. CETTE APPROCHE A ETE APPLIQUEE AU CALCUL DE LA DISSOCIATION D'IONS MOLECULAIRES PAR IMPULSIONS LASER INTENSES, EN CHERCHANT A CONTROLER L'IMPORTANCE RELATIVE DES DIFFERENTS MECANISMES DE FRAGMENTATION: DISSOCIATION AU-DESSUS DU SEUIL, RELACHEMENT DE LA LIAISON CHIMIQUE ET PIEGEAGE VIBRATIONNEL. NOUS UTILISONS UNE METHODE DE PROPAGATION TEMPORELLE DE PAQUETS D'ONDE QUI REVIENT A RESOUDRE NUMERIQUEMENT L'EQUATION DE SCHRODINGER DEPENDANT DU TEMPS. NOUS MONTRONS QU'IL EST POSSIBLE D'IMPOSER UNE DIRECTION D'EMISSION ET UNE ENERGIE CINETIQUE AUX FRAGMENTS DE LA DISSOCIATION. UNE APPLICATION A LA SEPARATION ANGULAIRE DES FRAGMENTS H#+ ET D#+, EMIS DANS DES DIRECTIONS OPPOSEES LORS DE LA DISSOCIATION DE L'ION MOLECULAIRE HD#+, EST EGALEMENT DECRITE
Author: Eric Charron
Publisher:
ISBN:
Category :
Languages : fr
Pages : 151
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Book Description
LA METHODE DU CONTROLE COHERENT D'UNE REACTION EST BASEE SUR LA SUPERPOSITION DE DEUX HARMONIQUES D'UN MEME LASER, AVEC UN DEPHASAGE CONSTANT ENTRE ELLES. CECI GENERE DES EFFETS D'INTERFERENCE QUI PERMETTENT DE FAVORISER UN CHEMIN REACTIONNEL DANS UN PROCESSUS MULTIVOIES. CETTE APPROCHE A ETE APPLIQUEE AU CALCUL DE LA DISSOCIATION D'IONS MOLECULAIRES PAR IMPULSIONS LASER INTENSES, EN CHERCHANT A CONTROLER L'IMPORTANCE RELATIVE DES DIFFERENTS MECANISMES DE FRAGMENTATION: DISSOCIATION AU-DESSUS DU SEUIL, RELACHEMENT DE LA LIAISON CHIMIQUE ET PIEGEAGE VIBRATIONNEL. NOUS UTILISONS UNE METHODE DE PROPAGATION TEMPORELLE DE PAQUETS D'ONDE QUI REVIENT A RESOUDRE NUMERIQUEMENT L'EQUATION DE SCHRODINGER DEPENDANT DU TEMPS. NOUS MONTRONS QU'IL EST POSSIBLE D'IMPOSER UNE DIRECTION D'EMISSION ET UNE ENERGIE CINETIQUE AUX FRAGMENTS DE LA DISSOCIATION. UNE APPLICATION A LA SEPARATION ANGULAIRE DES FRAGMENTS H#+ ET D#+, EMIS DANS DES DIRECTIONS OPPOSEES LORS DE LA DISSOCIATION DE L'ION MOLECULAIRE HD#+, EST EGALEMENT DECRITE
Author: Wolfgang Demtröder
Publisher: Springer
ISBN: 3642538592
Category : Science
Languages : en
Pages : 510
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Book Description
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femtosecond lasers) and parametric oscillators, coherent matter waves, Doppler-free Fourier spectroscopy with optical frequency combs, interference spectroscopy, quantum optics, the interferometric detection of gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.
Author: Ahmed Zewail
Publisher: Elsevier
ISBN: 008092669X
Category : Science
Languages : en
Pages : 333
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Book Description
This inspired book by some of the most influential scientists of our time--including six Nobel laureates--chronicles our emerging understanding of the chemical bond through the last nine decades and into the future. From Pauling's early structural work using x-ray and electron diffraction to Zewail's femtosecond lasers that probe molecular dynamics in real time; from Crick's molecular biology to Rich's molecular recognition, this book explores a rich tradition of scientific heritage and accomplishment. The perspectives given by Pauling, Perutz, Rich, Crick, Porter, Polanyi, Herschbach, Zewail, and Bernstein celebrate major scientific achievements in chemistry and biology with the chemical bond playing a fundamental role. In a unique presentation that also provides some lively insights into the very nature of scientific thought and discovery, The Chemical Bond: Structure and Dynamics will be of general interest to scientists, science historians, and the scientifically inclined populous.
Author:
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Category : Aeronautics
Languages : en
Pages : 1250
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Author: J. Hastings
Publisher: IOS Press
ISBN: 1643681338
Category : Science
Languages : en
Pages : 272
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Book Description
Many X-Ray Free-Electron Lasers (X-FELs) have been designed, built and commissioned since the first lasing of the Linac Coherent Light Source in the hard and soft X-ray regions, and great progress has been made in improving their performance and extending their capabilities. Meanwhile, experimental techniques to exploit the unique properties of X-FELs to explore atomic and molecular systems of interest to physics, chemistry, biology and the material sciences have also been developed. As a result, our knowledge of atomic and molecular science has been greatly extended. Nevertheless, there is still much to be accomplished, and the potential for discovery with X-FELs is still largely unexplored. The next generation of scientists will need to be well versed in both particle beams/FEL physics and X-ray photon science. This book presents material from the Enrico Fermi summer school: Physics of and Science with X-Ray Free-Electron Lasers, held at the Enrico Fermi International School of Physics in Varenna, Italy, from 26 June - 1 July 2017. The lectures presented at the school were aimed at introducing graduate students and young scientists to this fast growing and exciting scientific area, and subjects covered include basic accelerator and FEL physics, as well as an introduction to the main research topics in X-FEL-based biology, atomic molecular optical science, material sciences, high-energy density physics and chemistry. Bridging the gap between accelerator/FEL physicists and scientists from other disciplines, the book will be of interest to all those working in the field.
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Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 540
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1374
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Author: Ahmed H. Zewail
Publisher: World Scientific
ISBN: 9789810217365
Category : Science
Languages : en
Pages : 622
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Book Description
These two volumes on Femtochemistry present a timely contribution to a field central to the understanding of the dynamics of the chemical bond. This century has witnessed great strides in time and space resolutions, down to the atomic scale, providing chemists, biologists and physicists with unprecedented opportunities for seeing microscopic structures and dynamics. Femtochemistry is concerned with the time resolution of the most elementary motions of atoms during chemical change -- bond breaking and bond making -- on the femtosecond (10-15 second) time scale. This atomic scale of time resolution has now reached the ultimate for the chemical bond and as Lord George Porter puts it, chemists are near the end of the race against time. These two volumes cover the general concepts, techniques and applications of femtochemistry.Professor Ahmed Zewail, who has made the pioneering contributions in this field, has from over 250 publications selected the articles for this anthology. These volumes begin with a commentary and a historical chronology of the milestones. He then presents a broad perspective of the current state of knowledge in femtochemistry by researchers around the world and discusses possible new directions. In the words of a colleague, "it is a must on the reading-list for all of my students ... all readers will find this to be an informative and valuable overview."The introductory articles in Volume I provide reviews for both the non-experts as well as for experts in the field. This is followed by papers on the basic concepts. For applications, elementary reactions are studied first and then complex reactions. Volume I is complete with studies of solvation dynamics, non-reactive systems, ultrafast electron diffraction and the control of chemical reactions.Volume II continues with reaction rates, the concept of elementary intramolecular vibrational-energy redistribution (IVR) and the phenomena of rotational coherence which has become a powerful tool for the determination of molecular structure via time resolution. The second volume ends with an extensive list of references, according to topics, based on work by Professor Zewail and his group at Caltech.These collected works by Professor Zewail will certainly be indispensable to both experts and beginners in the field. The author is known for his clarity and for his creative and systematic contributions. These volumes will be of interest and should prove useful to chemists, biologists and physicists. As noted by Professor J Manz (Berlin) and Professor A W Castleman, Jr. (Penn State): femtochemistry is yielding exciting new discoveries from analysis to control of chemical reactions, with applications in many domains of chemistry and related fields, e.g., physical, organic and inorganic chemistry, surface science, molecular biology, ... etc.
Author: John R. Ferraro
Publisher: Academic Press
ISBN: 0323137903
Category : Science
Languages : en
Pages : 385
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Book Description
Praise for Introductory Raman Spectroscopy - Highlights basic theory, which is treated in an introductory fashion - Presents state-of-the-art instrumentation - Discusses new applications of Raman spectroscopy in industry and research
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 508
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