Atomic Physics With Positrons

Author : J.W. Humberston,E.A.G. Armour
Publisher : Springer Science & Business Media
Page : 448 pages
File Size : 50,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461309635

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Atomic Physics with Positrons by J.W. Humberston,E.A.G. Armour Pdf

The NATO Advanced Research Workshop on Atomic Physics with Positrons, which was held at University College London during 15-18 July 1987, was the fourth meeting in a series devoted to the general theme of positron colli sions in gases. Previous meetings have been held at York University, Toronto (1981); Royal Holloway College, Egham (1983) and Wayne State Uni versity, Detroit (1985). Recent very significant improvements in positron beam currents, due to the development of more efficient moderators and the use of more intense positron sources, are making possible an increasingly sophisticated range of experiments in atomic collision physics. Whereas a few years ago only total scattering cross sections could be determined, measurements can now be made of various partial and differential cross sections. Intense positron beams are also being used to produce positronium beams and already, as reported here, preliminary investigations have been made of collisions of positronium with several target systems. These experimental developments have stimulated, and been stimulated by, steady, if somewhat less spectacu1ar,progress in associated theoretical studies. Both aspects of the field are well represented in these Proceed ings.

Author : M. Charlton,J. W. Humberston
Publisher : Cambridge University Press
Page : 466 pages
File Size : 43,8 Mb
Release : 2005-10-13
Category : Science
ISBN : 9781139427029

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Positron Physics by M. Charlton,J. W. Humberston Pdf

This book provides a comprehensive and up-to-date account of the field of low energy positrons and positronium within atomic and molecular physics. Each chapter contains a blend of theory and experiment, giving a balanced treatment of all the topics. Useful for graduate students and researchers in physics and chemistry.

Author : P. Hautojärvi
Publisher : Springer Science & Business Media
Page : 266 pages
File Size : 52,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642813160

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Positrons in Solids by P. Hautojärvi Pdf

In condensed matter initially fast positrons annihilate after having reached equi librium with the surroundings. The interaction of positrons with matter is governed by the laws of ordinary quantum mechanics. Field theory and antiparticle properties enter only in the annihilation process leading to the emergence of energetic photons. The monitoring of annihilation radiation by nuclear spectroscopic methods provides valuable information on the electron-positron system which can directly be related to the electronic structure of the medium. Since the positron is a positive electron its behavior in matter is especially interesting to solid-state and atomic physi cists. The small mass quarantees that the positron is really a quantum mechanical particle and completely different from any other particles and atoms. Positron physics started about 25 years ago but discoveries of new features in its interac tion with matter have maintained continuous interest and increasing activity in the field. Nowadays it is becoming part of the "stock-in-trade" of experimental physics.

Author : Klaus Bartschat
Publisher : Springer
Page : 264 pages
File Size : 54,7 Mb
Release : 2013-06-29
Category : Science
ISBN : 9783642610103

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Computational Atomic Physics by Klaus Bartschat Pdf

Computational Atomic Physics deals with computational methods for calculating electron (and positron) scattering from atoms and ions, including elastic scattering, excitation, and ionization processes. Each chapter is divided into abstract, theory, computer program with sample input and output, summary, suggested problems, and references. An MS-DOS diskette is included, which holds 11 programs covering the features of each chapter and therefore contributing to a deeper understanding of the field. Thus the book provides a unique practical application of advanced quantum mechanics.

Author : John W. Humberston,M.R.C. McDowell
Publisher : Springer Science & Business Media
Page : 230 pages
File Size : 45,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461327516

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Positron Scattering in Gases by John W. Humberston,M.R.C. McDowell Pdf

The first conference in this series, devoted principally to the interaction of positrons in gases, was held at York University, Toronto, in July 1981 immediately preceding the XII ICPEAC in Gatlinburg, and the proceedings were published in the Canadian Journal of Physics, volume 60 (1982). So successful was this meeting that the decision was taken to hold a second one around the time of XIII ICPEAC in Berlin in 1983. London was clearly a convenient location but, rather than the obvious choice of University College London in central London, the Organising Committee decided that the beautiful and peaceful surroundings of Royal Holloway College would provide a more pleasant and intimate atmosphere for a small meeting. Even a small conference requires substantial sums of money to pay the expenses of invited speakers and when considering possible sources of funds the Organising Committee recognised that the intended format of the meeting and the international composition of the participants made it appropriate to apply to the NATO Science Committee for support under the Advanced Research Workshop Programme. This was one of the few successful applications made this year, and so it was that the conference became the 'NATO Advanced Research Workshop on Positron Scattering in Gases'. The Workshop, with approximately sixty participants, started after lunch on 19 July, 1983 and finished at mid-day on 23 July.

Author : Anand K. Bhatia
Publisher : MDPI
Page : 126 pages
File Size : 42,5 Mb
Release : 2021-03-19
Category : Mathematics
ISBN : 9783039437955

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Interactions of Positrons with Matter and Radiation by Anand K. Bhatia Pdf

Positrons can be used to study metallic defects. Positron annihilation experiments have been carried out to identify the defects in complex oxides. Positrons have also been used to study the Bose–Einstein condensation (BEC). Ps-BEC can be used to measure antigravity using atomic interferometers. This Special Issue hopes to bring awareness of the various aspects of positron interactions to the larger physics communities. We invite authors to submit articles from all areas of physics.

Author : Klaus Bartschat
Publisher : Springer
Page : 249 pages
File Size : 44,6 Mb
Release : 2014-10-03
Category : Science
ISBN : 3642610110

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Computational Atomic Physics by Klaus Bartschat Pdf

Computational Atomic Physics deals with computational methods for calculating electron (and positron) scattering from atoms and ions, including elastic scattering, excitation, and ionization processes. Each chapter is divided into abstract, theory, computer program with sample input and output, summary, suggested problems, and references. An MS-DOS diskette is included, which holds 11 programs covering the features of each chapter and therefore contributing to a deeper understanding of the field. Thus the book provides a unique practical application of advanced quantum mechanics.

Author : Ann T. Nelms
Publisher : Unknown
Page : 36 pages
File Size : 40,6 Mb
Release : 1956
Category : Science
ISBN : UOM:39015095043256

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Energy Loss and Range of Electrons and Positrons by Ann T. Nelms Pdf

Author : Alfredo Dupasquier,Allen P. Mills
Publisher : IOS Press
Page : 830 pages
File Size : 44,6 Mb
Release : 1995
Category : Electronic structure
ISBN : 9051992033

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Positron Spectroscopy of Solids by Alfredo Dupasquier,Allen P. Mills Pdf

The lifetime of a positron inside a solid is normally less than a fraction of nanosecond. This is a very short time on a human scale, but is long enough to enable the positron to visit an extended region of the material, and to sense the atomic and electronic structure of the environment. Thus, we can inject a positron in a sample to draw from it some signal giving us information on the microscopic properties of the material. This idea has been successfully developed in a number of positron-based techniques of physical analysis, with resolution in energy, momentum, or position. The complex of these techniques is what we call now positron spectroscopy of solids. The field of application of the positron spectroscopy extends from advanced problems of solid-state physics to industrial applications in the area of characterization of high-tech materials. This volume focuses the attention on the physics that can be learned from positron-based methods, but also frames those methods in a wider context including other experimental approaches. It can be considered as a textbook on positron spectroscopy of solids, the sort of book that the newcomer takes for his approach to this field, but also as a useful research tool for the expert.

Author : Jerzy Dryzek
Publisher : Springer Nature
Page : 146 pages
File Size : 46,6 Mb
Release : 2023-09-08
Category : Technology & Engineering
ISBN : 9783031410932

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Positron Profilometry by Jerzy Dryzek Pdf

This book provides a comprehensive overview of positron profilometry, specifically focusing on the analysis of defect depth distribution in materials. Positron profilometry plays a crucial role in understanding and characterizing defects in a wide range of materials, including metals, semiconductors, polymers, and ceramics. By analyzing the depth distribution of defects, researchers can gain insights into various material properties, such as crystal structure, defect density, and diffusion behavior. The author's extensive research spanning a period of two decades has primarily centered on subsurface zones. These regions, located beneath the surface and subjected to various surface processes, play a crucial role in generating defect distributions. Three experimental techniques and their data analysis are described in detail: a variable-energy positron beam (VEP) called sometimes a slow positron beam, a technique called implantation profile depth scanning (DSIP), and a sequential etching (SET) technique. The usability of these techniques is illustrated by many examples of measurements by the author and others.

Author : Paul G. Coleman
Publisher : World Scientific
Page : 348 pages
File Size : 46,8 Mb
Release : 2000
Category : Science
ISBN : 9810233949

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Positron Beams and Their Applications by Paul G. Coleman Pdf

This book provides a coherent and comprehensive overview of the generation and application of mono-energetic positron beams. It has been written by acknowledged experts, at a level accessible to graduate students working, or planning to work, with positron beams, and to scientists in other areas who want to know something about the field.The book begins with a brief historical introduction and an overview of how positron beams are generated and transported. A description of the fate of slow positrons in gaseous and condensed matter, with reference to many of the fundamental measurements made possible by the advent of positron beams, is followed by a discussion on applications in the study of solid surfaces, defect profiling in subsurface regions, interfaces and thin films, and the probing of bulk properties in novel ways. The book ends with a look at the future, considering the prospects for intense positron beams and their potential for further research.

Author : S.J. Wang,Z.Q. Chen,B. Wang,Y.C. Jean
Publisher : Trans Tech Publications Ltd
Page : 282 pages
File Size : 49,7 Mb
Release : 2008-11-06
Category : Technology & Engineering
ISBN : 9783038132585

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Positron and Positronium Chemistry by S.J. Wang,Z.Q. Chen,B. Wang,Y.C. Jean Pdf

The purpose of this special volume was to provide an international forum within which to present the recent progress made in positron and positronium chemistry, and to exchange new ideas in fields of research which use positrons and positronium. Volume is indexed by Thomson Reuters CPCI-S (WoS).

Author : Ole E. Mogensen
Publisher : Springer Science & Business Media
Page : 279 pages
File Size : 50,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642851230

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Positron Annihilation in Chemistry by Ole E. Mogensen Pdf

The only critical discussion available on the chemistry of the two "strange" light particles, the positron and positronium, with much space devoted to the excess electron. Positron annihilation allows the investigation of many unusual phenomena in the reaction kinetics of the positron, positronium, and excess electron, and in radiation chemistry and physics, while also providing important information on defects in solids.

Author : Clifford M. Surko,Franco A. Gianturco
Publisher : Springer Science & Business Media
Page : 850 pages
File Size : 45,6 Mb
Release : 2007-05-08
Category : Science
ISBN : 9780306476136

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New Directions in Antimatter Chemistry and Physics by Clifford M. Surko,Franco A. Gianturco Pdf

This volume is the outgrowth of a workshop held in October, 2000 at the Institute for Theoretical Atomic and Molecular Physics at the Harvard- Smithsonian Center for Astrophysics in Cambridge, MA. The aim of this book (similar in theme to the workshop) is to present an overview of new directions in antimatter physics and chemistry research. The emphasis is on positron and positronium interactions both with themselves and with ordinary matter. The timeliness of this subject comes from several considerations. New concepts for intense positron sources and the development of positron accumulators and trap-based positron beams provide qualitatively new experimental capabilities. On the theoretical side, the ability to model complex systems and complex processes has increased dramatically in recent years, due in part to progress in computational physics. There are presently an intriguing variety of phenomena that await theoretical explanation. It is virtually assured that the new experimental capabilities in this area will lead to a rapid expansion of this list. This book is organized into four sections: The first section discusses potential new experimental capabilities and the uses and the progress that might be made with them. The second section discusses topics involving antihydrogen and many-body phenomena, including Bose condensation of positronium atoms and positron interactions with materials. The final two sections treat a range of topics involving positron and positronium interactions with atoms and molecules.

Author : G. Kramer
Publisher : Springer
Page : 142 pages
File Size : 55,5 Mb
Release : 2014-03-12
Category : Science
ISBN : 3662157292

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Theory of Jets in Electron-Positron Annihilation by G. Kramer Pdf