Author: Gottfried Landwehr
Publisher: World Scientific
ISBN: 9814740837
Category :
Languages : en
Pages : 1108
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This volume contains contributions presented at the 12th International Conference on High Magnetic Fields in Semiconductor Physics. In order to give an overview, 37 lecturers not only reviewed the latest results in their field, but also gave a general introduction. The rapid development of semiconductor physics and technology during the last few years has resulted in an extensive application of high magnetic fields in both fundamental and applied research; more than 160 contributed papers were presented as posters.Sixteen years after its discovery, the quantum Hall effect (QHE) is still a subject of high activity. Many new results on the fractional QHE were presented; in addition to 6 invited papers, there were 43 contributions. Another field of high activity is magneto-optics, and 49 posters were presented. Magnetotransport also turned out to be of high interest, and magnetic semiconductors played a prominent role at the conference, too.Without doubt, the availability of superconducting magnets in most laboratories contributed to the growth of semiconductor physics in high magnetic fields. Because not all experiments can be performed in fields up to 10 or 15 teslas, high magnetic field laboratories offering larger fields are indispensable. There were reports from four laboratories on present work going on at these installations.
Author: D. V. Skobel tsyn
Publisher: Springer Science & Business Media
ISBN: 1475761759
Category : Science
Languages : en
Pages : 253
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This collection of articles contains a systematic outline of original experimental and theoretical research on photoproduction of neutral pions at protons and at a strongly bound system of a few nucleons, i.e., the helium nucleus. Spark chambers and their use as spectrometers for photons and electrons are described in detail. The articles of the collection include information on a novel method of determining the efficiency of recording apparatus by generating monochromatic photons. The articles de scribe original theoretical research on the optical anisotropy of nuclei. Problems encountered in experimental studies of operating the synchrotron as a storage-type accelerator of electrons and positrons receive particular attention. The results of this research work are listed, and the problems of oppositely directed electron-positron beams in the 250-MeV synchrotron are considered. The articles should be of interest to physicists, including research workers, teachers, engineers, graduate students, and students in advanced undergraduate courses. v CONTENTS Photoproduction of Neutral Pions at Nucleons and Nuclei B.B. Govorkov, S.P. Denisov, and E.V. Minarik 0 Photoproduction of 1r Mesons at Helium and at Photon Energies of 71 160-240 MeV ...
Author: D. V. Skobel tsyn
Publisher: Springer Science & Business Media
ISBN: 1468478028
Category : Science
Languages : en
Pages : 172
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309286344
Category : Science
Languages : en
Pages : 233
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The Committee to Assess the Current Status and Future Direction of High Magnetic Field Science in the United States was convened by the National Research Council in response to a request by the National Science Foundation. This report answers three questions: (1) What is the current state of high-field magnet science, engineering, and technology in the United States, and are there any conspicuous needs to be addressed? (2) What are the current science drivers and which scientific opportunities and challenges can be anticipated over the next ten years? (3) What are the principal existing and planned high magnetic field facilities outside of the United States, what roles have U.S. high field magnet development efforts played in developing those facilities, and what potentials exist for further international collaboration in this area? A magnetic field is produced by an electrical current in a metal coil. This current exerts an expansive force on the coil, and a magnetic field is "high" if it challenges the strength and current-carrying capacity of the materials that create the field. Although lower magnetic fields can be achieved using commercially available magnets, research in the highest achievable fields has been, and will continue to be, most often performed in large research centers that possess the materials and systems know-how for forefront research. Only a few high field centers exist around the world; in the United States, the principal center is the National High Magnetic Field Laboratory (NHMFL). High Magnetic Field Science and Its Application in the United States considers continued support for a centralized high-field facility such as NHFML to be the highest priority. This report contains a recommendation for the funding and siting of several new high field nuclear magnetic resonance magnets at user facilities in different regions of the United States. Continued advancement in high-magnetic field science requires substantial investments in magnets with enhanced capabilities. High Magnetic Field Science and Its Application in the United States contains recommendations for the further development of all-superconducting, hybrid, and higher field pulsed magnets that meet ambitious but achievable goals.
Author: D. Ter Haar
Publisher: Elsevier
ISBN: 1483152677
Category : Science
Languages : en
Pages : 547
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Book Description
Collected Papers of P. L. Kapitza, Volume I compiles the scientific papers written between 1916 and 1934 by Piotr Leonidovich Kapitza, a leading Soviet physicist and Nobel laureate. This book begins by introducing the life and career of P. L. Kapitza, which includes his studies and investigations of nuclear physics, strong magnetic fields, liquefaction, liquid helium, and high-power electronics. Other topics discussed include electron inertia in molecular ampere currents; Koch recording microphotometer; metallic conductivity and its change in a magnetic field; and methods of experimenting in strong magnetic fields. The liquefaction of helium by an adiabatic method; Zeeman and Paschen-Back effects in strong magnetic fields; and theoretical and empirical expressions for the heat transfer are also emphasized in this text. This compilation is a good reference for students and researchers conducting work on the biography and scientific contributions of P. L. Kapitza.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309054478
Category : Science
Languages : en
Pages : 379
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Book Description
Can the electric and magnetic fields (EMF) to which people are routinely exposed cause health effects? This volume assesses the data and draws conclusions about the consequences of human exposure to EMF. The committee examines what is known about three kinds of health effects associated with EMF: cancer, primarily childhood leukemia; reproduction and development; and neurobiological effects. This book provides a detailed discussion of hazard identification, dose-response assessment, exposure assessment, and risk characterization for each. Possible Health Effects of Exposure to Residential Electric and Magnetic Fields also discusses the tools available to measure exposure, common types of exposures, and what is known about the effects of exposure. The committee looks at correlations between EMF exposure and carcinogenesis, mutagenesis, neurobehavioral effects, reproductive and developmental effects, effects on melatonin and other neurochemicals, and effects on bone healing and stimulated cell growth.
Author: N. G. Basov
Publisher: Springer Science & Business Media
ISBN: 1468416235
Category : Science
Languages : en
Pages : 122
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Book Description
This volume reports investigations which form part of a major series of theoretical and experimental studies being carried out in the Laboratory of Low-Temperature Plasma Optics at the Lebedev Physics Institute in Moscow. The papers give the results of systematic investigations of the chemical composition and of the electrical and optical properties of discharge plasmas, and also of populations of laser levels. Reliable and detailed information is given on the dissociation of carbon dioxide gas in discharges; the nature of the velocity distribution function, average energies, and densities of electrons; and populations and vibrational temperatures of molecules in cw CO and CO lasers. The material in this volume is intended for specialists in quantum electronics and low temperature plasma diagnostics.
Author: D. V. Skobel tsyn
Publisher: Springer Science & Business Media
ISBN: 1468483722
Category : Science
Languages : en
Pages : 234
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Book Description
The first part of this collection sets out the results of some experimental and theoretical investigations into the optical properties of nontransition metals. The extensive future pros pects of metal optics are indicated; the use of metal optics enables a whole series of import ant electron properties of metals to be determined. Results obtained by studying intermolecular forces (the hydrogen bond and van der Waals forces) using spectroscopic methods (Raman effect and infrared absorption) are presented in the second part. A method of studying the true absorption of the drop phase of a water cloud is described. Methods of increasing the dispersion of manufactured spectral instruments and constructing various infrared spectrometers are indicated. The publication is intended for scientific workers, graduates, and students concerned with problems of metal optics, the electron properties of metals, and molecular spectroscopy. v CONTENTS OPTICAL PROPERTIES OF NONTRANSITION METALS G. P. Motulevich Introduction .••.•......• " .................•.......••. 1 Chapter I. Method of the Kinetic Equation in Metal Optics........... 5 § 1. Kinetic equation for the infrared part of the spectrum •.•..•...•....••.••.. 5 § 2. Anomalous skin effect . • . . . . . . . . . • . • . . • . . . . • . . • • • • • . . . . • . . • . . . . . . 9 § 3. Normal skin effect • • . . . . . • . . . . • • . • . . . • • • . . . . . • . . . . .. . . 11 . . • . . . . . . § 4. Weakly anomalous skin effect. . . • • • • . . . . . . . . . . . . • • . . . . • . .. • . 13 . . . . . . .
Author: A. B. Santra
Publisher: Alpha Science Int'l Ltd.
ISBN: 9788173195891
Category : Science
Languages : en
Pages : 362
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Book Description
"This monograph "Mesons and Quarks" includes a wide range of topics in the frontier areas of research in the overlapping field of nuclear and particle physics. It discusses various aspects of Quantum Chromodynamics (QCD) at different regimes of energy and density."--BOOK JACKET.
Author: N. G. Basov
Publisher: Springer Science & Business Media
ISBN: 1468416324
Category : Science
Languages : en
Pages : 249
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Book Description
