Optical Studies Of Radiation Damage Processes

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Optical Studies of Radiation Damage Processes

Author : D. M. J. Compton
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Optical Studies of Radiation Damage Processes by : D. M. J. Compton

Download or read book Optical Studies of Radiation Damage Processes written by D. M. J. Compton and published by . This book was released on 1966 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The program used the high dose rate available from an electron linear accelerator to study radiation damage and excitation-de-excitation processes on a fast time scale. Fast optical techniques were used to study the processes occurring, and apparatus and methods were developed for measuring optical absorption and emission at nanosecond speeds. Progress was also made towards the application of high-speed electron spin resonance to these problems. These techniques were applied to a study of de-excitation, from the energy deposited by an electron pulse in ruby and in GaAs, and also to the kinetics of radiation damage in GaAs. In the alkali halides, absorption techniques were used to study the introduction and annealing of F centers; and the trapping of radiation produced electrons to form F centers. Fast optical techniques proved to give an important increase in the understanding of these processes, and are also useful in understanding radiation-induced conductivity in insulators. Optical absorption and photoconductivity measurements were made to study the kinetics of complex defect center formation in silicon: this work is still in a preliminary stage. (Author).

Optical Studies of Radiation Damage Processes

Author : Rodolfo A. Cesena
Publisher :
ISBN 13 :
Total Pages : 123 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Optical Studies of Radiation Damage Processes by : Rodolfo A. Cesena

Download or read book Optical Studies of Radiation Damage Processes written by Rodolfo A. Cesena and published by . This book was released on 1970 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research program using the high dose rates available from an electron linear accelerator and fast optical techniques to study excitation-deexcitation, trapping, and radiation damage processes is presented. Radiation damage rates in gallium arsenide noncoherent and laser p-n junction diodes are compared by measuring the electrical characteristics and the electroluminescence output before and after irriation with fast electrons. A nonthermal, electrical annealing process is described which is effective in restoring the optical properties of irradiated diodes; the electrical characteristics, which are damaged by the radiation, are not restored by the anneal. To account for the various observations, a model is proposed in which the radiation does not introduce additional nonradiative recombination centers as previously thought but changes the radiative recombination centers to nonradiative. Potassium chloride is also investigated, and the shift in the peak absorption of the F-center with temperature is used to compute effective lattice frequencies. The self-bleaching of the F-centers and the energy required to form an F-center by ionization is experimentally determined as a function of initial F-center concentration and as a function of temperature. A value of 40 eV/F-center is measured at 300K at times of the order of microseconds after a radiation pulse; measurements a few seconds after the pulse yield a higher value due to the self-bleaching of the centers. (Author).

Optical Studies of Radiation Damage and Impurities in RbCdF3

Author : Ruo-Ling Hu
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (173 download)

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Book Synopsis Optical Studies of Radiation Damage and Impurities in RbCdF3 by : Ruo-Ling Hu

Download or read book Optical Studies of Radiation Damage and Impurities in RbCdF3 written by Ruo-Ling Hu and published by . This book was released on 1987 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Radiation Damage Processes in Materials

Author : C.H.S. Dupuy
Publisher : Springer
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Radiation Damage Processes in Materials by : C.H.S. Dupuy

Download or read book Radiation Damage Processes in Materials written by C.H.S. Dupuy and published by Springer. This book was released on 1975-07-31 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty years ago, the sharp development of the nuclear phy- SlCS has given scope to some connected areas such as radiochemis try, radiobiology, radioprotection, radiation damages. In this last subject - damages induced by radiations in mate rials, the earlier studies are essentially connected to the me chanism of defect creation. Several workers, for instance, SEITZ (1949), DIENES and VINEYARD (1957), BILLINGTON and CRAWFORD (1961) have developed the first approach in the damage processes theories. In the 65th years a "saturation effect" occurs in the studies of the mechanisms and correlatively a strong development appears in the physics of the defect itself. If it is possible in many cases to study defects without a good ~nowledge of their origin many researchs, in particular in the field of defects induced by energetic heavy ions, needs a better understanding of the damage processes. The track phenomena for instance is of special interest in heavy ions problems, cosmic ray tracks in lunar and meteorite crystals or glasses are a good indicator of the solar activity. On the other hand, color centers, induced by energetic heavy ions in alkali-halides crystals, shown a quite different behaviour than those created by light particles, it is necessary to assume that the ionic bombardement creates centers in a well located re gion : a core around the path of the incident particle.

The Use of Optical Methods in Studies of Radiation Damage in Low Temperature Electron Irradiated Germanium

Author : Jerzy Piekoszewski
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis The Use of Optical Methods in Studies of Radiation Damage in Low Temperature Electron Irradiated Germanium by : Jerzy Piekoszewski

Download or read book The Use of Optical Methods in Studies of Radiation Damage in Low Temperature Electron Irradiated Germanium written by Jerzy Piekoszewski and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Spectroscopy for Materials Characterization

Author : Simonpietro Agnello
Publisher : John Wiley & Sons
ISBN 13 : 1119697328
Total Pages : 500 pages
Book Rating : 4.1/5 (196 download)

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Book Synopsis Spectroscopy for Materials Characterization by : Simonpietro Agnello

Download or read book Spectroscopy for Materials Characterization written by Simonpietro Agnello and published by John Wiley & Sons. This book was released on 2021-09-08 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: SPECTROSCOPY FOR MATERIALS CHARACTERIZATION Learn foundational and advanced spectroscopy techniques from leading researchers in physics, chemistry, surface science, and nanoscience In Spectroscopy for Materials Characterization, accomplished researcher Simonpietro Agnello delivers a practical and accessible compilation of various spectroscopy techniques taught and used to today. The book offers a wide-ranging approach taught by leading researchers working in physics, chemistry, surface science, and nanoscience. It is ideal for both new students and advanced researchers studying and working with spectroscopy. Topics such as confocal and two photon spectroscopy, as well as infrared absorption and Raman and micro-Raman spectroscopy, are discussed, as are thermally stimulated luminescence and spectroscopic studies of radiation effects on optical materials. Each chapter includes a basic introduction to the theory necessary to understand a specific technique, details about the characteristic instrumental features and apparatuses used, including tips for the appropriate arrangement of a typical experiment, and a reproducible case study that shows the discussed techniques used in a real laboratory. Readers will benefit from the inclusion of: Complete and practical case studies at the conclusion of each chapter to highlight the concepts and techniques discussed in the material Citations of additional resources ideal for further study A thorough introduction to the basic aspects of radiation matter interaction in the visible-ultraviolet range and the fundamentals of absorption and emission A rigorous exploration of time resolved spectroscopy at the nanosecond and femtosecond intervals Perfect for Master and Ph.D. students and researchers in physics, chemistry, engineering, and biology, Spectroscopy for Materials Characterization will also earn a place in the libraries of materials science researchers and students seeking a one-stop reference to basic and advanced spectroscopy techniques.

THE STUDY OF RADIATION DAMAGE IN SAPPHIRE AND RUBY BY OPTICAL METHODS

Author : Peter David Townsend
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis THE STUDY OF RADIATION DAMAGE IN SAPPHIRE AND RUBY BY OPTICAL METHODS by : Peter David Townsend

Download or read book THE STUDY OF RADIATION DAMAGE IN SAPPHIRE AND RUBY BY OPTICAL METHODS written by Peter David Townsend and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Radiation Damage in Biomolecular Systems

Author : Gustavo García Gómez-Tejedor
Publisher : Springer Science & Business Media
ISBN 13 : 9400725639
Total Pages : 508 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Radiation Damage in Biomolecular Systems by : Gustavo García Gómez-Tejedor

Download or read book Radiation Damage in Biomolecular Systems written by Gustavo García Gómez-Tejedor and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of X-rays and radioactivity, ionizing radiations have been widely applied in medicine both for diagnostic and therapeutic purposes. The risks associated with radiation exposure and handling led to the parallel development of the field of radiation protection. Pioneering experiments done by Sanche and co-workers in 2000 showed that low-energy secondary electrons, which are abundantly generated along radiation tracks, are primarily responsible for radiation damage through successive interactions with the molecular constituents of the medium. Apart from ionizing processes, which are usually related to radiation damage, below the ionization level low-energy electrons can induce molecular fragmentation via dissociative processes such as internal excitation and electron attachment. This prompted collaborative projects between different research groups from European countries together with other specialists from Canada, the USA and Australia. This book summarizes the advances achieved by these research groups after more than ten years of studies on radiation damage in biomolecular systems. An extensive Part I deals with recent experimental and theoretical findings on radiation induced damage at the molecular level. It includes many contributions on electron and positron collisions with biologically relevant molecules. X-ray and ion interactions are also covered. Part II addresses different approaches to radiation damage modelling. In Part III biomedical aspects of radiation effects are treated on different scales. After the physics-oriented focus of the previous parts, there is a gradual transition to biology and medicine with the increasing size of the object studied. Finally, Part IV is dedicated to current trends and novel techniques in radiation reserach and the applications hence arising. It includes new developments in radiotherapy and related cancer therapies, as well as technical optimizations of accelerators and totally new equipment designs, giving a glimpse of the near future of radiation-based medical treatments.

Encyclopedia of Glass Science, Technology, History, and Culture Two Volume Set

Author : Pascal Richet
Publisher : John Wiley & Sons
ISBN 13 : 1118799399
Total Pages : 1568 pages
Book Rating : 4.1/5 (187 download)

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Book Synopsis Encyclopedia of Glass Science, Technology, History, and Culture Two Volume Set by : Pascal Richet

Download or read book Encyclopedia of Glass Science, Technology, History, and Culture Two Volume Set written by Pascal Richet and published by John Wiley & Sons. This book was released on 2021-02-05 with total page 1568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Encyclopedia begins with an introduction summarizing itsscope and content. Glassmaking; Structure of Glass, GlassPhysics,Transport Properties, Chemistry of Glass, Glass and Light,Inorganic Glass Families, Organic Glasses, Glass and theEnvironment, Historical and Economical Aspect of Glassmaking,History of Glass, Glass and Art, and outlinepossible newdevelopments and uses as presented by the best known people in thefield (C.A. Angell, for example). Sections and chapters arearranged in a logical order to ensure overall consistency and avoiduseless repetitions. All sections are introduced by a briefintroduction and attractive illustration. Newly investigatedtopics will be addresses, with the goal of ensuring that thisEncyclopedia remains a reference work for years to come.

Laser-Induced Damage of Optical Materials

Author : Roger M. Wood
Publisher : CRC Press
ISBN 13 : 9780750308458
Total Pages : 241 pages
Book Rating : 4.3/5 (84 download)

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Book Synopsis Laser-Induced Damage of Optical Materials by : Roger M. Wood

Download or read book Laser-Induced Damage of Optical Materials written by Roger M. Wood and published by CRC Press. This book was released on 2003-08-01 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laser power handling capacities of optical systems are determined by the physical properties of their component materials. At low intensity levels these factors are not important, but an understanding of damage mechanisms is fundamental to good design of laser products operating at high power. Laser Induced Damage of Optical Materials presents a comprehensive overview of the damage processes that occur at high laser intensity levels and explains how these factors limit the energy handling capabilities of optical systems. The first two chapters of the book review basic EM theory, and consider optical effects, including absorption and scattering processes, that occur at low and medium energy levels. Chapter 3 describes the damage mechanisms that come into effect when intensity levels are raised. Chapter 4 discusses the central theory for the definition and measurement of the laser-induced damage thresholds of optical materials. This covers both thermal damage and dielectric breakdown as a function of absorption and laser pulse length and spot size. The following chapters are devoted to surfaces and sub-surface damage, coatings, measurement techniques, and special topics such as scaling and the importance of using the correct measurement unit systems. Laser Induced Damage of Optical Materials is an invaluable resource to those working with optical systems where high laser intensity is a factor.

Radiation Damage Processes in Materials

Author : C.H.S. Dupuy
Publisher : Springer
ISBN 13 : 9789028605435
Total Pages : 542 pages
Book Rating : 4.6/5 (54 download)

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Book Synopsis Radiation Damage Processes in Materials by : C.H.S. Dupuy

Download or read book Radiation Damage Processes in Materials written by C.H.S. Dupuy and published by Springer. This book was released on 1975-07-31 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty years ago, the sharp development of the nuclear phy- SlCS has given scope to some connected areas such as radiochemis try, radiobiology, radioprotection, radiation damages. In this last subject - damages induced by radiations in mate rials, the earlier studies are essentially connected to the me chanism of defect creation. Several workers, for instance, SEITZ (1949), DIENES and VINEYARD (1957), BILLINGTON and CRAWFORD (1961) have developed the first approach in the damage processes theories. In the 65th years a "saturation effect" occurs in the studies of the mechanisms and correlatively a strong development appears in the physics of the defect itself. If it is possible in many cases to study defects without a good ~nowledge of their origin many researchs, in particular in the field of defects induced by energetic heavy ions, needs a better understanding of the damage processes. The track phenomena for instance is of special interest in heavy ions problems, cosmic ray tracks in lunar and meteorite crystals or glasses are a good indicator of the solar activity. On the other hand, color centers, induced by energetic heavy ions in alkali-halides crystals, shown a quite different behaviour than those created by light particles, it is necessary to assume that the ionic bombardement creates centers in a well located re gion : a core around the path of the incident particle.

Radiation Effects in Advanced Semiconductor Materials and Devices

Author : C. Claeys
Publisher : Springer Science & Business Media
ISBN 13 : 9783540433934
Total Pages : 440 pages
Book Rating : 4.4/5 (339 download)

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Book Synopsis Radiation Effects in Advanced Semiconductor Materials and Devices by : C. Claeys

Download or read book Radiation Effects in Advanced Semiconductor Materials and Devices written by C. Claeys and published by Springer Science & Business Media. This book was released on 2002-08-21 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This wide-ranging book summarizes the current knowledge of radiation defects in semiconductors, outlining the shortcomings of present experimental and modelling techniques and giving an outlook on future developments. It also provides information on the application of sensors in nuclear power plants.

Optical Processes in Semiconductors

Author : Jacques I. Pankove
Publisher : Courier Corporation
ISBN 13 : 0486138704
Total Pages : 466 pages
Book Rating : 4.4/5 (861 download)

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Book Synopsis Optical Processes in Semiconductors by : Jacques I. Pankove

Download or read book Optical Processes in Semiconductors written by Jacques I. Pankove and published by Courier Corporation. This book was released on 2012-12-19 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive text and reference covers all phenomena involving light in semiconductors, emphasizing modern applications in semiconductor lasers, electroluminescence, photodetectors, photoconductors, photoemitters, polarization effects, absorption spectroscopy, more. Numerous problems. 339 illustrations.

Radiation Hardening of Strengthened Optical Fibers and Development of New Fluoride Glasses

Author : R. K. Mohr
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Radiation Hardening of Strengthened Optical Fibers and Development of New Fluoride Glasses by : R. K. Mohr

Download or read book Radiation Hardening of Strengthened Optical Fibers and Development of New Fluoride Glasses written by R. K. Mohr and published by . This book was released on 1982 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two independent studies were conducted under this contract: (1) Radiation hardening of compressively strengthened optical fibers; (2) Development of new fluoride glasses. In the first study two preform fabrication processes based on phase separable, leachable alkali borosilicate glasses were evaluated for producing radiation hardened fibers. The first process, known as partial leaching, was found to yield low numerical aperture fibers with moderately high attenuation. Ultra-clean glass melting facilities and extensive composition studies would be required to correct these faults. This was beyond the resources of the contract. The second process, known as molecular stuffing, was used to produce alkali-modified high silica glasses doped with cerium oxide as a radiation hardening agent. Radiation damage kinetic tests were run on these glasses by irradiating the samples with 4-40 ns pulses of 15 MeV electrons and observing the absorption spectra for the time range 0.0000001 sec to 0.1 sec following the electron pulses. The results of these tests show that cerium is not effective, within the time range studies, in suppressing the radiation induced absorption for the high silica glasses tested. In the second study, under this contract, glasses in the HfF4-BaF2-LaF3 family were studied. The effects on glass forming of additions including PbF2, CsF, GdF3 and AlF3 glass was studied.

The Modelling of Radiation Damage in Metals Using Ehrenfest Dynamics

Author : Christopher Race
Publisher : Springer
ISBN 13 : 9783642154386
Total Pages : 303 pages
Book Rating : 4.1/5 (543 download)

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Book Synopsis The Modelling of Radiation Damage in Metals Using Ehrenfest Dynamics by : Christopher Race

Download or read book The Modelling of Radiation Damage in Metals Using Ehrenfest Dynamics written by Christopher Race and published by Springer. This book was released on 2011-01-07 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomistic simulations of metals under irradiation are indispensable for understanding damage processes at time- and length-scales beyond the reach of experiment. Previously, such simulations have largely ignored the effect of electronic excitations on the atomic dynamics, even though energy exchange between atoms and electrons can have significant effects on the extent and nature of radiation damage. This thesis presents the results of time-dependent tight-binding simulations of radiation damage, in which the evolution of a coupled system of energetic classical ions and quantum mechanical electrons is correctly described. The effects of electronic excitations in collision cascades and ion channeling are explored and a new model is presented, which makes possible the accurate reproduction of non-adiabatic electronic forces in large-scale classical molecular dynamics simulations of metals.

Optical Processes in Semiconductors

Author : Jacques I. Pankove
Publisher : Courier Corporation
ISBN 13 : 9780486602752
Total Pages : 466 pages
Book Rating : 4.6/5 (27 download)

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Book Synopsis Optical Processes in Semiconductors by : Jacques I. Pankove

Download or read book Optical Processes in Semiconductors written by Jacques I. Pankove and published by Courier Corporation. This book was released on 1975-01-01 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a series of lectures at Berkeley, 1968–1969, this is the first book to deal comprehensively with all of the phenomena involving light in semiconductors. The author has combined, for the graduate student and researcher, a great variety of source material, journal research, and many years of experimental research, adding new insights published for the first time in this book. Coverage includes energy states in semiconductors and their perturbation by external parameters, absorption, relationships between optical constants, spectroscopy, radiative transitions, nonradiative recombination, processes in pn junctions, semiconductor lasers, interactions involving coherent radiation, photoelectric emission, photovoltaic effects, polarization effects, photochemical effects, effect of traps on luminescence, and reflective modulation. The author has presented the subject in a manner which couples readily to physical intuition. He introduces new techniques and concepts, including nonradiative recombination, effects of doping on optical properties, Franz-Keldysh effect in absorption and emission, reflectance modulation, and many others. Dr. Pankove emphasizes the underlying principle that can be applied to the analysis and design of a wide variety of functional devices and systems. Many valuable references, illustrative problems, and tables are also provided here.

Optical Processes in Solids

Author : Yutaka Toyozawa
Publisher : Cambridge University Press
ISBN 13 : 9780521554473
Total Pages : 432 pages
Book Rating : 4.5/5 (544 download)

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Book Synopsis Optical Processes in Solids by : Yutaka Toyozawa

Download or read book Optical Processes in Solids written by Yutaka Toyozawa and published by Cambridge University Press. This book was released on 2003-01-09 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unifying element that links the apparently diverse phenomena observed in optical processes is the dielectric dispersion of matter. It describes the response of matter to incoming electromagnetic waves and charged particles, and thus predicts their behavior in the self-induced field of matter, known as polariton and polaron effects. The energies of phonon, exciton and plasmon, quanta of collective motions of charged particles constituting the matter, are also governed by dielectric dispersion. Since the latter is a functional of the former, one can derive useful relations for their self-consistency. Nonlinear response to laser light inclusive of multiphoton processes, and excitation of atomic inner shells by synchrotron radiation, are also described. Within the configuration coordinate model, photo-induced lattice relaxation and chemical reaction are described equally to both ground and relaxed excited states, to provide a novel and global perspective on structural phase transitions and the nature of interatomic bonds. This book was first published in 2003.