Resonances

Resonances

Author: Donald G. Truhlar

Publisher:

ISBN: 0841208654

Category:

Page: 522

View: 410

Categories:

Giant Resonances in Atoms Molecules and Solids

Giant Resonances in Atoms  Molecules  and Solids

D. L. Lynch, W. McKoy, and R.R. Lucchese, in Resonances in ElectronMolecule Scattering, Van der Waals Complexes, and Reactive Chemical Dynamics, ...

Author: J.P. Connerade

Publisher: Springer

ISBN: 9781489920041

Category: Technology & Engineering

Page: 570

View: 850

Often, a new area of science grows at the confines between recognised subject divisions, drawing upon techniques and intellectual perspectives from a diversity of fields. Such growth can remain unnoticed at first, until a characteristic fami ly of effects, described by appropriate key words, has developed, at which point a distinct subject is born. Such is very much the case with atomic 'giant resonances'. For a start, their name itself was borrowed from the field of nuclear collective resonances. The energy range in which they occur, at the juncture of the extreme UV and the soft X-rays, remains to this day a meeting point of two different experimental techniques: the grating and the crystal spectrometer. The impetus of synchrotron spectroscopy also played a large part in developing novel methods, described by many acronyms, which are used to study 'giant resonances' today. Finally, although we have described them as 'atomic' to differentiate them from their counterparts in Nuclear Physics, their occurrence on atomic sites does not inhibit their existence in molecules and solids. In fact, 'giant resonances' provide a new unifying theme, cutting accross some of the traditional scientific boundaries. After much separate development, the spectroscopies of the atom in various environments can meet afresh around this theme of common interest. Centrifugal barrier effects and 'giant resonances' proper emerged almost simultaneously in the late 1960's from two widely separated areas of physics, namely the study of free atoms and of condensed matter.
Categories: Technology & Engineering

Vacuum Ultraviolet Photoionization and Photodissociation of Molecules and Clusters

Vacuum Ultraviolet Photoionization and Photodissociation of Molecules and Clusters

P.W. Langhoff, in Resonances in Electron-Molecule Scattering, van der Waals Complexes and Reactive Chemical Dynamics, ACS Symposium Series, No. 263, ed.

Author: Cheuk-Yiu Ng

Publisher: World Scientific

ISBN: 9789814506571

Category: Science

Page: 580

View: 424

This monograph reviews the recent progress in vacuum ultraviolet (VUV) photoionization and photodissociation processes. Photoionization, photoelectron, and fluorescence spectroscopic techniques have played an important role in revealing the photoionization and photodissociation dynamics of molecules in the vacuum ultraviolet region and in providing accurate energetic and spectroscopic information of ions as well as neutral molecules. The book represents the first detailed review of major experimental developments in the studies of single vacuum ultraviolet photon ionization and dissociation processes of gaseous molecules and clusters. Contents:Photoionization Mass Spectrometric Studies of Free Radicals (J Berkowitz & B Ruscic)Photoelectron Spectroscopy of Short-Lived Molecules (J M Dyke et al.)Photoelectron-Photoion Coincidence Studies of Ion Dissociation Dynamics (T Baer et al.)Applications of Coherent Vacuum Ultraviolet to Photofragment and Photoionization Spectroscopy (J W Hepburn)Photon Transfer in Ionic States of Hydrogen-Bonded Dimers: A Photoelectron Spectroscopic Approach (S Tomoda & K Kimura)Spectroscopy and Reaction Dynamics Using Ultrahigh Resolution VUV Lasers (A H Kung & Y T Lee)Molecular Beam Photoionization and Photoelectron-Photoion Coincidence Studies of High Temperature Molecules, Transient Species, and Clusters (C Y Ng)Dispersed Fluorescence as a Probe of Molecular Photoionization Dynamics (E D Poliakoff)Absorption and Fluorescence Studies of Molecules and Clusters (K Shobatake et al.)Vibrationally Resolved Photoelectron Angular Distribution and Branching Ratios (J B West) Readership: Physical chemists. keywords:
Categories: Science

The Theory of Chemical Reaction Dynamics

The Theory of Chemical Reaction Dynamics

Lee, H. Romanow ski and L.B. Harding, in Resonances in Electron-Molecule Scattering, van der Waal's Complexes, and Reactive Chemical Dynamics, D.G. Truhlar, ...

Author: D.C. Clary

Publisher: Springer Science & Business Media

ISBN: 9789400946187

Category: Science

Page: 418

View: 746

The calculation of cross sections and rate constants for chemical reactions in the gas phase has long been a major problem in theoretical chemistry. The need for reliable and applicable theories in this field is evident when one considers the significant recent advances that have been made in developing experimental techniques, such as lasers and molecular beams, to probe the microscopic details of chemical reactions. For example, it is now becoming possible to measure cross sections for chemical reactions state selected in the vibrational rotational states of both reactants and products. Furthermore, in areas such as atmospheric, combustion and interstellar chemistry, there is an urgent need for reliable reaction rate constant data over a range of temperatures, and this information is often difficult to obtain in experiments. The classical trajectory method can be applied routinely to simple reactions, but this approach neglects important quantum mechanical effects such as tunnelling and resonances. For all these reasons, the quantum theory of reactive scattering is an area that has received considerable attention recently. This book describes the proceedings of a NATO Advanced Research Workshop held at CECAM, Orsay, France in June, 1985. The Workshop concentrated on a critical examination and discussion of the recent developments in the theory of chemical reaction dynamics, with particular emphasis on quantum theories. Several papers focus on exact theories for reactions.
Categories: Science

Fundamental Processes of Atomic Dynamics

Fundamental Processes of Atomic Dynamics

"Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics," ACS Symposium Series, No. 263, ed.

Author: J.S.S. Briggs

Publisher: Springer Science & Business Media

ISBN: 9781468455441

Category: Science

Page: 706

View: 777

This volume contains the lectures presented at the NATO Advanced study Institute "Fundamental Processes of Atomic Dynamics" held in Maratea. Italy from September 20th to October 2nd 1987. The institute and this volume were conceived as a natural complement to previous institutes held in Maratea (1982) and in Santa Flavia (1984. ) whose proceedings are to be found in NATO ASI Series B vol. 103 and 134 respectively. The subject matter of these institutes was the study of the funda mental processes occurring in the interactions of atoms with photons. electrons and heavy-ions. The aim has been to unify these processes in a coherent experimen tal and theoretical approach. The present volume brings this approach up to date and contains in addition. for contrast and variety. a description of similar dynamical processes in the study of clusters and surfaces. The institute was opened with a lecture by Joe Macek in which he summarised the current status of atomic collision research. propounded the philosophy of a unified approach to structure, fragmentation and collision and posed the outstanding questions in the field. This lecture forms the introduction to this volume. The subject matter was divided into experiment and theory with the lectures inter-linked so that the one could re-inforce the other. The whole of the theoretical part of the institute was organised by Ugo Fano as an on-going symposium.
Categories: Science

Photodissociation Dynamics

Photodissociation Dynamics

Resonances in Electron - Molecule Scattering , van der Waals Complexes , and Reactive Chemical Dynamics ( American Chemical Society , Washington , D.C. ) .

Author: Reinhard Schinke

Publisher: Cambridge University Press

ISBN: 0521484146

Category: Science

Page: 417

View: 551

Starting from multi-dimensional potential energy surfaces and the Schrödinger equation of nuclear motion, this text elucidates the achievements in calculating photodissociation cross sections and fragment state distributions from first principles.
Categories: Science

Photon and Electron Collisions with Atoms and Molecules

Photon and Electron Collisions with Atoms and Molecules

A theoretical chemist's perspective, in: Resonances In Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, D. G. Truhlar ...

Author: Philip G. Burke

Publisher: Springer Science & Business Media

ISBN: 9781461559177

Category: Science

Page: 386

View: 391

Research on photon and electron collisions with atomic and molecular targets and their ions has seen a rapid increase in interest, both experimentally and theoretically, in recent years. This is partly because these processes provide an ideal means of investigating the dynamics of many particle systems at a fundamental level and partly because their detailed understanding is required in many other fields, particularly astrophysics, plasma physics and controlled thermonuclear fusion, laser physics, atmospheric processes, isotope separation, radiation physics and chemistry and surface science. In recent years a number of important advances have been made, both on the experimental side and on the theoretical side. On the experimental side these include absolute measurements of cross sections, experiments using coincidence techniques, the use of polarised beams and targets, the development of very high energy resolution electron beams, the use of synchrotron radiation sources and ion storage rings, the study of laser assisted atomic collisions, the interaction of super-intense lasers with atoms and molecules and the increasing number of studies using positron beams.
Categories: Science

Structure and Dynamics of Weakly Bound Molecular Complexes

Structure and Dynamics of Weakly Bound Molecular Complexes

D. G. Truhlar, Ed., Resonances in Electron-Molecule Scattering, van der Waals Complexes and Reactive Chemical Dynamics (ACS Sym– posium Series, Vol.

Author: Alfons Weber

Publisher: Springer Science & Business Media

ISBN: 9789400939691

Category: Science

Page: 633

View: 448

The study of weakly bound molecular complexes has in recent years brought this field of investigation to the forefront of physical and chemical research. The scope of the subject is wide and different terminology and nomenclature is current among the various subspecialties. Thus, the term "metal cluster" often connotes to the organic chemist a metal-organic compound, while the physicist will more likely think of groups of metal atoms held together by weak interatomic forces. Aggregates, clusters, complexes, van der Waals molecules, hydrogen-bonded molecules, etc. are terms currently in use, sometimes interchangeably while other times with well defined and mutually exclusive meanings. The subjects of this volume are the free, isolated vim der Waals and hydrogen-bonded molecules. Owing to the present state of experimental knowledge these are mostly dimers, i. e. , entities formed by two strongly bound molecules, an atom and a molecule, or two atoms held together by the weak hydrogen-bonding, or the still weaker van der Waals forces. Weakly bound complexes formed of more than two strongly bound sub-units, i. e. , trimers, tetramers, etc. , are now coming within reachof experimental observation and several papers in this book deal with them. The study of van der Waals and hydrogen-bonded interactions has been pursued for several decades. Most of these ,investigations have, however, dealt with systems in the condensed phase in which bulk effects are commingled with and therefore mask the weak binary interactions.
Categories: Science

Reviews in Computational Chemistry

Reviews in Computational Chemistry

J. Simons, in Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, D. Truhlar (Ed.), Vol.

Author: Abby L. Parrill

Publisher: John Wiley & Sons

ISBN: 9781118889930

Category: Science

Page: 560

View: 302

The Reviews in Computational Chemistry series brings together leading authorities in the field to teach the newcomer and update the expert on topics centered around molecular modeling, such as computer-assisted molecular design (CAMD), quantum chemistry, molecular mechanics and dynamics, and quantitative structure-activity relationships (QSAR). This volume, like those prior to it, features chapters by experts in various fields of computational chemistry. Topics in Volume 28 include: Free-energy Calculations with Metadynamics Polarizable Force Fields for Biomolecular Modeling Modeling Protein Folding Pathways Assessing Structural Predictions of Protein-Protein Recognition Kinetic Monte Carlo Simulation of Electrochemical Systems Reactivity and Dynamics at Liquid Interfaces
Categories: Science

Molecules in Physics Chemistry and Biology

Molecules in Physics  Chemistry  and Biology

Resonances in Electron Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, Am. Chem. Soc., Symposium Series 263, Washington DC, p.

Author: J. Maruani

Publisher: Springer Science & Business Media

ISBN: 9789400928534

Category: Science

Page: 460

View: 207

Volume 1: General Introduction to Molecular Sciences Volume 2: Physical Aspects of Molecular Systems Volume 3: Electronic Structure and Chemical Reactivity Volume 4: Molecular Phenomena in Biological Sciences
Categories: Science

Molecules in Physics Chemistry and Biology

Molecules in Physics  Chemistry  and Biology

Resonances in Electron Molecule Scattering , van der Waals Complexes , and Reactive Chemical Dynamics , Am . Chem . Soc . , Symposium Series 263 ...

Author: Jean Maruani

Publisher: Springer Science & Business Media

ISBN: 9027725985

Category: Science

Page: 460

View: 885

Volume 1: General Introduction to Molecular Sciences Volume 2: Physical Aspects of Molecular Systems Volume 3: Electronic Structure and Chemical Reactivity Volume 4: Molecular Phenomena in Biological Sciences
Categories: Science

Modern Trends in Chemical Reaction Dynamics

Modern Trends in Chemical Reaction Dynamics

Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, ACS Symposium Series, ed.

Author: Xueming Yang

Publisher: World Scientific

ISBN: 9789812389237

Category: Science

Page: 526

View: 627

Annotation Provides a detailed picture of the current status of advanced experimental and theoretical research in chemical reaction dynamics. Topics include the Doppler-selected time-of-flight technique, multimass ion imaging, and photodissociation dynamics of free radicals.
Categories: Science

Modern Trends in Chemical Reaction Dynamics

Modern Trends in Chemical Reaction Dynamics

Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, ACS Symposium Series, ed.

Author: Xueming Yang

Publisher: World Scientific

ISBN: 9789814482271

Category: Science

Page: 540

View: 408

The field of chemical reaction dynamics has made tremendous progress during the last decade or so. This is due largely to the development of many new, state-of-the-art experimental and theoretical techniques during that period. It is beneficial to present these advances, both theoretical and experimental, in a review volume (Parts I and II). The primary purpose of this review volume is to provide graduate students and experts in the field with a rather detailed picture of the current status of advanced experimental and theoretical research in chemical reaction dynamics. All chapters in these two parts have been written by world-renowned experts active in such research. Contents:Doppler-Selected Time-of-Flight Technique: A Versatile Three-Dimensional Velocity Mapping Approach (S-H Lee & K Liu)The Effect of Reactive Resonance on Collision Observables (S D Chao & R T Skodje)State-to-State Dynamics of Elementary Chemical Reactions Using Rydberg H-Atom Translational Spectroscopy (X-M Yang)Multimass Ion Imaging — A New Experimental Method and Its Application in the Photodissociation of Small Aromatic Molecules (C-L Huang et al.)Reactions of Neutral Transition Metal Atoms with Small Molecules in the Gas Phase (J J Schroden & H F Davis)Photodissociation Dynamics of Ozone in the Hartley Band (P L Houston)Crossed Molecular Beam Reactive Scattering: Towards Universal Product Detection by Soft Electron-Impact Ionization (P Casavecchia et al.)Interactions of Vibrationally-Excited Molecules at Surfaces: A Probe for Electronically Nonadiabatic Effects in Heterogeneous Chemistry (A M Wodtke)First Principles Quantum Dynamical Study of Four-Atom Reactions (D Zhang et al.)Photodissociation Dynamics of Free Radicals (J Zhang) Readership: Undergraduate and graduate students in chemistry as well as atomic and molecular physics; researchers in physical chemistry. Keywords:Physical Chemistry;Chemical Physics;Molecular Physics;Chemical Reaction Dynamics;Molecular Dynamics;Quantum Dynamics;Photochemistry;Theoretical Chemistry
Categories: Science

Electron Collisions with Molecules Clusters and Surfaces

Electron Collisions with Molecules  Clusters  and Surfaces

... "Resonances in Electron-Molecule Scattering, Van der Waals Complexes, and Reactive Chemical Dynamics", D.G. Truhlar, ed., ACS Symposium series 263:183.

Author: H. Ehrhardt

Publisher: Springer Science & Business Media

ISBN: 9781489914897

Category: Science

Page: 264

View: 385

This volume contains the invited papers and selected contributed papers presented at the biennial International Symposium on ELECTRON COLLISIONS WITH MOLECULES, CLUSTERS AND SURF ACES held at Royal Holloway, University of London from 29th to 30th July, 1993. This Symposium was a Satellite Meeting of the XVIII International Conference on the Physics of Electronic and Atomic Collisions (ICPEAC) and follows a 16 year tradition of Satellite Conferences in related areas of collisions held in association with previous ICPEAC's. In the past each of these electron -molecule symposia covered the broad field of electron-molecule scattering at rather low energies, but also included hot topics. This time as well as covering the whole field, well defined electron collisions with clusters and with particles in the complex potential of a surface were emphasized. Not many details are known about such collisions, although they become more and more important in surface characterisation, plasma-wall interactions, electron induced desorption and reorganisation of adsorbed particles. Recently, much work, theoretical and experimental, has been devoted to electron collisions with rather large carbon, silicon and halogen containing molecules. These problems are of relevance in plasma assisted thin film formation and etching of surfaces and can now be approached with advanced theoretical methods and experimental equipment.
Categories: Science

Theory of Chemical Reaction Dynamics

Theory of Chemical Reaction Dynamics

Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, edited by D. G. Truhlar (ACS, Washington D.C., 1984).

Author: Antonio Laganà

Publisher: Springer Science & Business Media

ISBN: 9781402021657

Category: Science

Page: 504

View: 598

Proceedings of the NATO Advanced Research Workshop, held in Balatonföldvár, Hungary, 8-12 June 2003
Categories: Science

Excess Electrons in Dielectric Media

Excess Electrons in Dielectric Media

... CO , O2 and NO , in Resonances in Electron - Molecules Scatttering van der Waals Complexes and Reactive Chemical Dynamics , ACS Symp . Ser . no .

Author: Christiane Ferradini

Publisher: CRC Press

ISBN: 0849369622

Category: Science

Page: 456

View: 636

This book provides a comprehensive review of the present knowledge and current problems concerning physical-chemical aspects of the behavior of excess electrons in various media. The book's 13 chapters strike a balance between theoretical and experimental accounts and provide in-depth presentations of specific subjects. Among the several topics discussed in this stimulating volume are primary interactions, transport, and relaxation of excess electrons of a few tens of electron-Volts in various solid and liquid materials; energetics and transport properties of electrons after thermalization in non-polar dielectric liquids; quantum simulation methods; and electron solvation in polar liquids and of excess electrons trapped in polar matrices at low temperature. Applications of these concepts are discussed as well, including hot electron transport in silicon dioxide, the fate of excess electrons created in polar dielectric liquids by photoelectrochemical methods or by cathodic generation, and excess electron production and decay in organic microheterogeneous systems. Researchers, instructors, and engineers working in the radiation sciences, condensed-matter physics, chemical physics, biophysics, photochemistry, and the biochemistry of electron transfer and electrochemistry should consider this book to be an invaluable reference resource.
Categories: Science

Comprehensive Chemical Kinetics

Comprehensive Chemical Kinetics

D. G. Truhlar (Ed.), Resonances in Electron-Molecule Scattering, van der Waals Complexes, and Reactive Chemical Dynamics, American Chemical Society, ...

Author: Nicholas Green

Publisher: Elsevier

ISBN: 0080543448

Category: Science

Page: 262

View: 778

Unimolecular reactions are in principle the simplest chemical reactions, because they only involve one molecule. The basic mechanism, in which the competition between the chemical reaction step and a collisional deactivation leads to a pressure-dependent coefficient, has been understood for a long time. However, this is a rapidly developing field, and many new and important discoveries have been made in the past decade. This First Part Part of Two CCK Volumes dealing with Unimolecular Rections, deals with the Reaction Step. The first chapter is an introduction to the whole project, aiming to cover the material necessary to understand the content of the detailed chapters, as well as the history of the development of the area. Chapter 2 is a review of the modern view of the statistical theories, as embodied in the various forms of RRKM theory. Chapter 3 deals with the fully quantum mechanical view of reactive states as resonances. . Presents considerable advances in the field made during the last decade. . Treats both the statistical as well as the fully quantum mechanical view.
Categories: Science