Download or read book Positron Annihilation Study of Elastic Stresses in Metals written by Dirk Theodore Peterson and published by . This book was released on 1988 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Positron Annihilation written by A.T. Steward and published by Elsevier. This book was released on 2012-12-02 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Positron Annihilation focuses on the process of positron annihilation in different environments. Partitioned into two parts with 42 chapters, the book contains the contributions of authors who have done research on the annihilation of positrons, which brought about valuable information on the properties of matter. The first part of the book deals with lengthy review articles, including a survey of the physics of positron annihilation; positron annihilation in metals and the theory involved in the process; and positron annihilation in alkali halides and ionic crystals. Positronium formation and interaction in gases, molecular substances, and ionic crystals are also given attention. Gaseous positronics and positron annihilation in condensed gases and liquids are also discussed. The second part of the book focuses on developments on positron annihilation and the direction of research on this field. The studies concentrate on positron annihilation in various crystals, metals, mercury, liquefied gases, helium, and metal oxides. Numerical representations and analyses are presented to support the processes involved. The book can best serve the interest of those who want to explore further the annihilation of positrons.
Download or read book Accelerator based Gamma induced Positron Annihilation Spectroscopy Analysis of Dynamic and Static Laser Induced Deformation in Copper and Tungsten written by Jason Reid Williams and published by . This book was released on 2004 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was designed to determine the feasibility of using accelerator-based gamma-induced positron annihilation spectroscopy (AGPAS) techniques to measure the properties of laser induced stress waves in the bulk of thin metal samples. AGPAS is a relatively new method which utilizes high energy (1-20 MeV) linear electron accelerators to create positrons from pair-production throughout the bulk of high Z material, and subsequently to measure the emitted annihilation radiation from the sample. Thin copper and tungsten foils were irradiated with Nd:YAG laser irradiation at a wavelength of 1064 nm and power densities between 15 and 31 MW/cm2, to launch planar elastic stress waves into the samples. The maximum stress induced in the samples for these irradiation power densities was measured with piezoelectric stress sensors attached to the rear surface of the samples, and AGPAS analysis of the samples after irradiation was conducted to assure that no plastic deformation or thermally induced defects were created in the samples. AGPAS analysis of the copper and tungsten samples was then conducted during the first 40 ns the laser induced stress waves propagated through the samples. The data from these experiments demonstrated that at the precision of this experiment, AGPAS analysis was not sensitive to the laser induced thermal excitation, damage, or compressive stress profile induced in the metal samples for incident laser power densities below 30 MW/cm2. These data demonstrate that if our current AGPAS setup is to measure the properties of laser induced stress waves in metal samples, then the stresses induced in the samples must exceed approximately 4 MPa.
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Oata Analysis and Synthesis (CINOAS) * at Purdue. University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 33 (thesis year 1988) a total of 13,273 theses titles from 23 Canadian and 1 85 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 33 reports theses submitted in 1988, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Positron Annihilation in Metals at Very High Pressures written by John L. Przybylinski and published by . This book was released on 1970 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Positron Annihilation written by Rados?aw Zaleski and published by Trans Tech Publications Ltd. This book was released on 2010-12-30 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). The aim of this special collection is to present recent progress made, and reflect current ideas, in research fields where positron and positronium are involved. The contents cover a wide range of positron-related research topics; including both fundamental (theoretical calculations, radiation chemistry, hyperfine interactions, positronium physics and chemistry) and applied (metal, polymer, thin film and other materials, development of experimental techniques) aspects.
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:
Download or read book Positron annihilation studies of nickel and steel electrolytically charged with hydrogen written by F.A. Smith and published by . This book was released on 1981 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Positron Annihilation Studies of Nickel and Steel Electrolytically Charged with Hydrogen written by F. A. Smith and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Residual and Applied Stress Using Neutron Diffraction written by Michael T. Hutchings and published by Springer Science & Business Media. This book was released on 1992 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relevance of residual stresses in engineering components is being increasingly appreciated by modern engineers concerned with design and performance. The non-destructive evaluation of such stresses has provided a challenge which has been addressed by the use of X-ray diffraction to characterize near-surface stresses. The extension of diffraction stress measurements to include neutron diffraction represents a major advance. Use of the penetrating power of neutrons is ideally suited to the determination of macrostress variation through thick components and of microstresses in composites and multiphase alloys. This collection of papers on the subject is the first of its kind and represents a definitive summary of the field. With contributions by most of the world's experts, it gives a comprehensive treatment of the theory, practice and problems in the measurement of residual stresses using neutrons, with references to virtually all work currently in print. It provides state-of-the-art information about the uses and limitations of the method, with numerous examples. It is appropriate both for those currently using X-ray methods, and f
Download or read book Defect studies in metals using positron annihilation written by Thomas Maxwell Hall and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Study of Positron Annihilation with Core Electrons in Several Metals written by Allin George Gould and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 1628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Positron Annihilation Studies of Cyclic Fatigue Damage in Metals and Aging in Polymers written by Nokuleswar Panigrahi and published by . This book was released on 1987 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Studies of Angular Correlation Distribution of Positron electron Annihilation in Metals Semimetals and Semiconductors and on Simple Metal Surfaces written by Lou Yongming and published by . This book was released on 1991 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties Of Metals written by C W Lung and published by World Scientific. This book was released on 1999-07-05 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is intended to describe the basic and newly developed elements of the physics of solids and materials science on mechanical properties of metals with as much continuity as is possible. Particular emphasis has been placed in atomistic and fractal approaches and continuum theory of dislocations is also introduced. Since the book is meant for the two main topics of progress in recent years, some interesting and important topics which have not been discussed or introduced are given in detail.For a long time, pair potentials were used very expensively in simulation studies. They can reproduce usefully total energies for many systems. But when one turns to elastic properties, fracture of surfaces, and the vacancy formation energy, deficiencies and limitations begin to emerge. These limitations of the simple pair potential approximation have been addressed by the development of empirical many-body potentials which is the major theme of our book.Over a decade or more, diverse scientists have recognized that many of the structures common in their experiments have a special kind of geometrical complexity. The key to this progress is the recognition that many random structures obey a symmetry that objects look the same on many different scales of observation. The concept of fractals was introduced by Mandelbrot and applied to fractures by himself and collaborators. Their work pointed to a correlation between toughness and the fractal dimension. Our interest is the fractal aspects of fractured surfaces. We will discuss more in our book.The strain field of a dislocation has a long range part and this part can be discussed rigorously from elasticity theory. Recent progress in elastic strain fields and dislocation mobility were made by Indenbom and Lothe. The elementary essentials will be introduced in our book.
Download or read book Positron Annihilation in Metals written by Sunder Lal Bhatia and published by . This book was released on 1969 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
