Electron Collisions with Molecules, Clusters, and Surfaces

Electron Collisions with Molecules, Clusters, and Surfaces
Author: H. Ehrhardt
Publisher: Springer Science & Business Media
Total Pages: 265
Release: 2013-06-29
Genre: Science
ISBN: 1489914897

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.

Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces

Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces
Author: J. Berakdar
Publisher: Springer Science & Business Media
Total Pages: 500
Release: 2012-12-06
Genre: Science
ISBN: 1461513111

Since the early days of modem physics spectroscopic techniques have been employed as a powerful tool to assess existing theoretical models and to uncover novel phenomena that promote the development of new concepts. Conventionally, the system to be probed is prepared in a well-defined state. Upon a controlled perturbation one measures then the spectrum of a single particle (electron, photon, etc.) emitted from the probe. The analysis of this single particle spectrum yields a wealth of important information on the properties of the system, such as optical and magnetic behaviour. Therefore, such analysis is nowadays a standard tool to investigate and characterize a variety of materials. However, it was clear at a very early stage that real physical compounds consist of many coupled particles that may be excited simultaneously in response to an external perturbation. Yet, the simultaneous (coincident) detection of two or more excited species proved to be a serious technical obstacle, in particular for extended electronic systems such as surfaces. In recent years, however, coincidence techniques have progressed so far as to image the multi-particle excitation spectrum in an impressive detail. Correspondingly, many-body theoretical concepts have been put forward to interpret the experimental findings and to direct future experimental research. This book gives a snapshot of the present status of multi-particle coincidence studies both from a theoretical and an experimental point of view. It also includes selected topical review articles that highlight the achievements and the power of coincident techniques.

Latest Advances In Atomic Clusters Collisions: Fission, Fusion, Electron, Ion And Photon Impact

Latest Advances In Atomic Clusters Collisions: Fission, Fusion, Electron, Ion And Photon Impact
Author: Jean-patrick Connerade
Publisher: World Scientific
Total Pages: 398
Release: 2004-11-24
Genre: Science
ISBN: 1783260521

This comprehensive volume surveys the general aspects of atomic cluster science and outlines some of its important new challenges. It begins by detailing the recent advances in the understanding of structure and the essential properties of selected atomic cluster systems, fullerenes and confined atoms. Recent advances in the field of photo processes involving atomic clusters and fullerenes are discussed, and an entire chapter is devoted to the problem of fission dynamics of atomic clusters, presenting parallels with similar processes in nuclear physics.The book goes on to describe the problems of electron-cluster collisions with special emphasis on polarization and collective excitation effects. The important area of the behavior of atomic clusters in laser fields is considered; the ionization, collective dynamics of electrons in the system in the presence of the laser field, and the laser induced dynamics of molecules and clusters are thoroughly described.Finally, a broad spectrum of problems in the area of ionic collisions with fullerenes and metal clusters is covered — from both experimental and theoretical points of view — and the results of the most recent measurements are reported. The concluding chapter takes a careful look at the interaction of an atomic cluster with a surface. The problems of cluster deposition and formation at a surface as well as collision processes involving clusters deposited at a surface are considered through a number of illustrative examples./a

Photon and Electron Collisions with Atoms and Molecules

Photon and Electron Collisions with Atoms and Molecules
Author: Philip G. Burke
Publisher: Springer Science & Business Media
Total Pages: 384
Release: 2012-12-06
Genre: Science
ISBN: 1461559170

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.

Ionization, Correlation, and Polarization in Atomic Collisions

Ionization, Correlation, and Polarization in Atomic Collisions
Author: Azzedine Lahmam-Bennani
Publisher: American Institute of Physics
Total Pages: 250
Release: 2006-01-19
Genre: Science
ISBN:

This proceedings volume contains the invited talks presented at two atomic physics symposia held jointly in Buenos Aires, Argentina from 28-30 July 2005. All papers were peer-reviewed. They represent the latest research in dynamics of collision systems involving collisions between photons, electrons, and ions and a diverse range of target species: atoms, molecules, clusters, and surfaces. There is a particular emphasis on correlation and many-body effects in excitation and ionization.

State-of-the-art Reviews On Energetic Ion-atom And Ion-molecule Collisions

State-of-the-art Reviews On Energetic Ion-atom And Ion-molecule Collisions
Author: Dzevad Belkic
Publisher: World Scientific
Total Pages: 371
Release: 2019-10-17
Genre: Science
ISBN: 9811211620

This book is based upon a part of the invited and contributing talks at the 25th International Symposium on Ion-Atom Collisions, ISIAC (biennial), held on July 23-25, 2017 in Palm Cove, Queensland, Australia. To aid the general reader, all the authors tried to present their chapters in the context of the development of the addressed particular themes and the underlying major ideas and intricacies. Some chapters contain new results that have not been previously published elsewhere. Whenever possible, the authors made their attempts to connect the basic research in atomic and molecular collision physics with some important applications in other branches of physics as well as across the physics borders. It is hoped that the material presented in this book will be interesting and useful to the beginners and specialists alike. The contents and expositions are deemed to be helpful to the beginners in assessing the potential overlap of some of the presented material with their own research themes and this might provide motivations for possible further upgrades. Likewise, specialists could take advantage of these reviews to see where the addressed themes were and where they are going, in order to acknowledge the fruits of the efforts made thus far and actively contribute to tailoring the directions of future research. Overall, this book is truly interdisciplinary. It judiciously combines experiments and theories within particle collision physics on atomic and molecular levels. It presents state-of-the-art fundamental research in this field. It addresses the possibilities for significant and versatile applications outside standard atomic and molecular collision physics ranging from astrophysics, surface as well as cluster physics/chemistry, hadron therapy in medicine and to the chemical industry. It is then, as Volume 2, fully in the spirit of the 'Aims and Scope' of this book series by reference to its 'Mission Statement'.

Metal Clusters at Surfaces

Metal Clusters at Surfaces
Author: Karl-Heinz Meiwes-Broer
Publisher: Springer Science & Business Media
Total Pages: 315
Release: 2012-12-06
Genre: Science
ISBN: 3642571697

Due to the interaction with the contact medium, the properties of clusters may change or even disappear. Thus the physics of cluster-on-surface systems -- the main subject of this book -- is of fundamental importance. The book addresses a wide audience, from the newcomer to the expert. Starting from fundamental concepts of adsorbate-surface interactions, the modification of electronic properties through electron confinement, and concepts of cluster production, it elucidates the distinct properties of the new metallic nanostructures.

Collisions of Electrons with Atoms and Molecules

Collisions of Electrons with Atoms and Molecules
Author: G.F. Drukarev
Publisher: Springer Science & Business Media
Total Pages: 252
Release: 2012-12-06
Genre: Science
ISBN: 1461317797

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.

Current Status and Future Perspectives of Electron Interactions with Molecules, Clusters, Surfaces, and Interfaces [Workshop on Fundamental Challenges in Electron-driven Chemistry ; Workshop on Electron-driven Processes

Current Status and Future Perspectives of Electron Interactions with Molecules, Clusters, Surfaces, and Interfaces [Workshop on Fundamental Challenges in Electron-driven Chemistry ; Workshop on Electron-driven Processes
Author:
Publisher:
Total Pages: 57
Release: 2000
Genre:
ISBN:

This report is based largely on presentations and discussions at two workshops and contributions from workshop participants. The workshop on Fundamental Challenges in Electron-Driven Chemistry was held in Berkeley, October 9-10, 1998, and addressed questions regarding theory, computation, and simulation. The workshop on Electron-Driven Processes: Scientific Challenges and Technological Opportunities was held at Stevens Institute of Technology, March 16-17, 2000, and focused largely on experiments. Electron-molecule and electron-atom collisions initiate and drive almost all the relevant chemical processes associated with radiation chemistry, environmental chemistry, stability of waste repositories, plasma-enhanced chemical vapor deposition, plasma processing of materials for microelectronic devices and other applications, and novel light sources for research purposes (e.g. excimer lamps in the extreme ultraviolet) and in everyday lighting applications. The life sciences are a rapidly advancing field where the important role of electron-driven processes is only now beginning to be recognized. Many of the applications of electron-initiated chemical processes require results in the near term. A large-scale, multidisciplinary and collaborative effort should be mounted to solve these problems in a timely way so that their solution will have the needed impact on the urgent questions of understanding the physico-chemical processes initiated and driven by electron interactions.

Collisions of Molecules with Clusters

Collisions of Molecules with Clusters
Author:
Publisher:
Total Pages: 15
Release: 1993
Genre:
ISBN:

Presented are results of a quasiclassical simulation study of processes induced by a collision of a D2 molecule with a Ni13 cluster. Focus was on the reactive channel, i.e., dissociative adsorption of the molecule. Dependence on factors such as the collision energy, initial (quantized) rovibrational state of the molecule, and structure and temperature of cluster were analyzed. Direct and indirect (involving formation of transient complexes -- resonances) reaction pathways were considered and characterized quantitatively. We have illustrated how multidimensional potential energy surfaces describing cluster-molecule interactions can be analyzed in terms of a reduced set of relevant degrees of freedom and the topologies of these surfaces correlated with dynamical phenomena extracted from the calculations. The complex problem of ''tuning'' the cluster-molecule interaction potential using experimental data has also been addressed, and a specific example of such ''tuning'' has been given. It underscores the crucial role of the intimate interplay between theory and experiment, especially in the field of clusters where, because of the large number of degrees of freedom involved, first principle calculations are (and will remain) of limited feasibility. More generally, the analysis and the discussion presented show that the phenomena and problems relevant for cluster-molecule collisions -- a new research area by all accounts have much in common with those encountered in nucleus-nucleus, atom-atom, atom-molecule, and molecule-molecule collisions -- research fields with a considerable history.