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Annihilation Of Positrons In Solids
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Book Synopsis Positrons in Solids by : P. Hautojärvi
Download or read book Positrons in Solids written by P. Hautojärvi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Positron Studies of Solids, Surfaces, and Atoms by : Allen P. Mills
Download or read book Positron Studies of Solids, Surfaces, and Atoms written by Allen P. Mills and published by . This book was released on 1986 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annihilation of Positrons in Solids by : Ing-Jiunn Ma
Download or read book Annihilation of Positrons in Solids written by Ing-Jiunn Ma and published by . This book was released on 1960* with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annihilation of Positrons in Liquids and Solids by : Atomic Energy of Canada Limited
Download or read book Annihilation of Positrons in Liquids and Solids written by Atomic Energy of Canada Limited and published by . This book was released on 1959 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-Quantum Annihilation of Positrons in Solids by : Atomic Energy of Canada Limited
Download or read book Three-Quantum Annihilation of Positrons in Solids written by Atomic Energy of Canada Limited and published by . This book was released on 1959 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Positron Annihilation in Solids by : A. R. Mackintosh
Download or read book Positron Annihilation in Solids written by A. R. Mackintosh and published by . This book was released on 1962 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory of Positron Annihilation in Solids by : R. A. FERRELL
Download or read book Theory of Positron Annihilation in Solids written by R. A. FERRELL and published by . This book was released on 1956 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annihilation of positrons in liquids and solids by : R. E. Bell
Download or read book Annihilation of positrons in liquids and solids written by R. E. Bell and published by . This book was released on 1955 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Positron Annihilation in Molecular Solids by : Irwin Spirn
Download or read book Positron Annihilation in Molecular Solids written by Irwin Spirn and published by . This book was released on 1966 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-photon Annihilation of Positrons in Solids and Liquids by : James Franklin Scoggin
Download or read book Three-photon Annihilation of Positrons in Solids and Liquids written by James Franklin Scoggin and published by . This book was released on 1957 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time Distribution of Positron Annihilation in Liquids and Solids by : Atomic Energy of Canada Limited
Download or read book Time Distribution of Positron Annihilation in Liquids and Solids written by Atomic Energy of Canada Limited and published by . This book was released on 1959 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Positron Annihilation in Chemistry by : Ole E. Mogensen
Download or read book Positron Annihilation in Chemistry written by Ole E. Mogensen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Time Spectra of Positron Annihilation in Some Liquids and Solids by : Erhard Lothar Edgar Kluth
Download or read book Time Spectra of Positron Annihilation in Some Liquids and Solids written by Erhard Lothar Edgar Kluth and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Positron Spectroscopy of Solids by : Alfredo Dupasquier
Download or read book Positron Spectroscopy of Solids written by Alfredo Dupasquier and published by IOS Press. This book was released on 1995 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Positron annihilation in defective solids by : P. Hautojarvi
Download or read book Positron annihilation in defective solids written by P. Hautojarvi and published by . This book was released on 1973 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Positron Annihilation Studies of Solids and Surfaces by : Paul Richard Guagliardo
Download or read book Positron Annihilation Studies of Solids and Surfaces written by Paul Richard Guagliardo and published by . This book was released on 2011 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated abstract] This thesis describes the first positron annihilation studies undertaken in the Atomic, Molecular and Surface Physics group in the School of Physics at the University of Western Australia (UWA). We have studied a range of systems with differing positron annihilation characteristics with the aim of characterising their defect properties, and in the process have gained insight into the interactions of positrons and positronium with materials. The project started with establishing a positron annihilation laboratory. This entailed developing procedures to produce and safely handle sealed 22Na sources, and testing positron annihilation instrumentation and experimental methods. The project evolved through collaboration with physicists, engineers, chemists, materials scientists, metallurgists and medical scientists and through a number of interesting experimental explorations of the physical phenomena affecting positron annihilation. An overview of these investigations and a thesis synopsis is given below. Chapter 1 is an introduction to positron annihilation techniques, concentrating on the interactions of positrons (and positronium) with materials, and on the spectroscopies that exploit the annihilation processes for the purpose of studying condensed matter systems. Chapter 2 describes the testing and optimisation of the positron annihilation lifetime spectrometer and Doppler broadening spectrometer. In Chapter 3, positron annihilation has been applied to study cation vacancies in oxides that exhibit ionic bonding. Such vacancies have a relative negative charge and so attract positrons, and the relatively low electron density at these sites causes enhanced positron lifetimes. Oxides considered in this work are (a) rutile, (Ti,Nb)O2, sintered in air and Ar; (b) tin oxide, (Sn,Nb)O2 sintered in air; (c) monoclinic zirconia, (Zr,Nb)O2; (d) pollucite, Cs(1-x)Al(1-x)Si(2+x)O6 and (e) Ta- and Ti-doped Zn2TiO4. All systems except (c) showed enhanced lifetimes when doping or off-stoichiometry was increased. In Chapter 4, positron annihilation has been used to study the nanoporosity of cementitious materials. The mechanical properties of these materials are heavily influenced by porosity, with the volume and size distribution of pores controlling both the strength and durability of the material...
Book Synopsis Time distribution of positron annihilation in liquids and solids by : R. E. Bell
Download or read book Time distribution of positron annihilation in liquids and solids written by R. E. Bell and published by . This book was released on 1953 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
