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Author : W. Koenig
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (256 download)
Download or read book Positron Lines from Subcritical Heavy Ion-atom Collisions written by W. Koenig and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Edward Schweppe
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (72 download)
Download or read book A Search for Spontaneous Positron Production in Heavy Ion-Atom Collisions written by John Edward Schweppe and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard Marrus
Publisher : Springer Science & Business Media
ISBN 13 : 146130833X
Total Pages : 474 pages
Book Rating : 4.4/5 (613 download)
Download or read book Physics of Highly-Ionized Atoms written by Richard Marrus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress in the physics of highly-ionized atoms since the last NATO sponsored ASI on this subject in 1982 has been enormous. New accelerator facilities capable of extending the range of highly-ionized ions to very high-Z have come on line or are about to be completed. We note particularly the GANIL accelerator in Caen, France, the Michigan State Superconducting Cyclotrons in East Lansing both of which are currently operating and the SIS Accelerator in Darmstadt, FRG which is scheduled to accelerate beam in late 1989. Progress i~ low-energy ion production has been equally dramatic. The Lawrence Livermore Lab EBIT device has produced neon-like gold and there has been continued improvement in ECR and EBIS sources. The scientific developments in this field have kept pace with the technical developments. New theoretical methods for evaluating relativistic and QED effects have made possible highly-precise calcula tions of energy levels in one-and two-electron ions at high-Z. The calculations are based on the MCDF method and the variational method and will be subject to rigorous experimental tests. On the experimental side, precision x-ray and UV measurements have probed the Lamb shift in the one and two electron ions up to Z=36 with increasing precision.
Author : P. Kienle
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (245 download)
Download or read book Positron Production in Heavy Ion-atom Collisions written by P. Kienle and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Allan Franklin
Publisher : University of Pittsburgh Press
ISBN 13 : 0822970708
Total Pages : 303 pages
Book Rating : 4.8/5 (229 download)
Download or read book Selectivity And Discord written by Allan Franklin and published by University of Pittsburgh Press. This book was released on 2002-11-17 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selectivity and Discord addresses the fundamental question of whether there are grounds for belief in experimental results. Specifically, Allan Franklin is concerned with two problems in the use of experimental results in science: selectivity of data or analysis procedures and the resolution of discordant results.By means of detailed case studies of episodes from the history of modern physics, Franklin shows how these problems can be—and are—solved in the normal practice of science and, therefore, that experimental results may be legitimately used as a basis for scientific knowledge.
Author : Stefan Schramm
Publisher : Springer
ISBN 13 : 3319441655
Total Pages : 381 pages
Book Rating : 4.3/5 (194 download)
Download or read book New Horizons in Fundamental Physics written by Stefan Schramm and published by Springer. This book was released on 2016-11-11 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the state-of-the-art in selected topics across modern nuclear physics, covering fields of central importance to research and illustrating their connection to many different areas of physics. It describes recent progress in the study of superheavy and exotic nuclei, which is pushing our knowledge to ever heavier elements and neutron-richer isotopes. Extending nuclear physics to systems that are many times denser than even the core of an atomic nucleus, one enters the realm of the physics of neutron stars and possibly quark stars, a topic that is intensively investigated with many ground-based and outer-space research missions as well as numerous theoretical works. By colliding two nuclei at very high ultra-relativistic energies one can create a fireball of extremely hot matter, reminiscent of the universe very shortly after the big bang, leading to a phase of melted hadrons and free quarks and gluons, the so-called quark-gluon plasma. These studies tie up with effects of crucial importance in other fields. During the collision of heavy ions, electric fields of extreme strength are produced, potentially destabilizing the vacuum of the atomic physics system, subsequently leading to the decay of the vacuum state and the emission of positrons. In neutron stars the ultra-dense matter might support extremely high magnetic fields, far beyond anything that can be produced in the laboratory, significantly affecting the stellar properties. At very high densities general relativity predicts the stellar collapse to a black hole. However, a number of current theoretical activities, modifying Einstein’s theory, point to possible alternative scenarios, where this collapse might be avoided. These and related topics are addressed in this book in a series of highly readable chapters. In addition, the book includes fundamental analyses of the practicalities involved in transiting to an electricity supply mainly based on renewable energies, investigating this scenario less from an engineering and more from a physics point of view. While the topics comprise a large scope of activities, the contributions also show an extensive overlap in the methodology and in the analytical and numerical tools involved in tackling these diverse research fields that are the forefront of modern science.
Author :
Publisher :
ISBN 13 :
Total Pages : 840 pages
Book Rating : 4.3/5 (129 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. Bottcher
Publisher : CRC Press
ISBN 13 : 9783718604920
Total Pages : 348 pages
Book Rating : 4.6/5 (49 download)
Download or read book Nuclear and Atomic Physics at One Gigaflop written by C. Bottcher and published by CRC Press. This book was released on 1989 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop held at Oak Ridge, Tennessee, April 1988, deal with problems in atomic and nuclear physics that require access to supercomputing at effective rates of one gigaflop or more. Topics include strong fields, quarks, the few body problem, heavy-ion collisions, nuclear hydrodynamics, Monte Carlo techniques, and more. No subject index. Acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR
Author : Allan Franklin
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1643271628
Total Pages : 162 pages
Book Rating : 4.6/5 (432 download)
Download or read book Is It the 'Same' Result written by Allan Franklin and published by Morgan & Claypool Publishers. This book was released on 2018-10-30 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Replication, the independent confirmation of experimental results and conclusions, is regarded as the "gold standard" in science. This book examines the question of successful or failed replications and demonstrates that that question is not always easy to answer. It presents clear examples of successful replications, the discoveries of the Higgs boson and of gravity waves. Failed replications include early experiments on the Fifth Force, a proposed modification of Newton's Law of universal gravitation, and the measurements of "G," the constant in that law. Other case studies illustrate some of the difficulties and complexities in deciding whether a replication is successful or failed. It also discusses how that question has been answered. These studies include the "discovery" of the pentaquark in the early 2000s and the continuing search for neutrinoless double beta decay. It argues that although successful replication is the goal of scientific experimentation, it is not always easily achieved.
Author : Helmut Bokemeyer
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (613 download)
Download or read book Positron Line Emission in Very Heavy-ion Collisions written by Helmut Bokemeyer and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 840 pages
Book Rating : 4.3/5 (91 download)
Download or read book Physics briefs written by and published by . This book was released on 1989 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. Bokemeyer
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (256 download)
Download or read book The Phenomenon of Narrow Positron Line Emission in Very Heavy Ion Collisions written by H. Bokemeyer and published by . This book was released on 1987 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Walter Greiner
Publisher : Springer Science & Business Media
ISBN 13 : 1461318890
Total Pages : 996 pages
Book Rating : 4.4/5 (613 download)
Download or read book Physics of Strong Fields written by Walter Greiner and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NATO Advanced Study Institute on Physios of St~ong Fields was held at Maratea/Italy from 1-14 June, 1986. The school was devoted to the advances, theoretical and experimental, in physics of strong fields made during the past five years. The topic of the first week was almost exclusively quantum electrodynamics, with dis cussions of symmetry breaking in the ground state, of the physics of strong fields in heavy ion collisions and of precision tests of perturba tive quantum electrodynamics. The famous positron lines found at GSI (Darmstadt) and the related question "new particle versus vacuum decay" - (yes or no or both) - constituted the center of experimental advances. This was followed in the second week by the presentation of a broad range of other areas where strong fields occur, reaching from nuclear physics over quantum chromodynamics to gravitation theory and astrophysics. We were fortunate to be able to calIon a body of lecturers who not only made considerable personal contributions to this research but who are also noted for their lecturing skills. Their enthusiasm and dedication for their work was readily transmitted to the students resulting in a very suc cessful school.
Author : H. Tsertos
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (256 download)
Download or read book On the Production Mechanism of the Narrow Positron Lines Observed in Heavy-ion Collisions written by H. Tsertos and published by . This book was released on 1987 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 908 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Author : Bernd Crasemann
Publisher : Springer Science & Business Media
ISBN 13 : 1461324173
Total Pages : 760 pages
Book Rating : 4.4/5 (613 download)
Download or read book Atomic Inner-Shell Physics written by Bernd Crasemann and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of atomic inner shells has undergone significant advances in recent years. Fast computers and new experimental tools, notably syn chrotron-radiation sources and heavy-ion accelerators, have greatly enhan ced the scope of problems that are accessible. The level of research activity is growing substantially; added incentives are provided by the importance of inner-shell processes in such diverse areas as plasma studies, astrophysics, laser technology, biology, medicine, and materials science. The main reason for all this exciting activity in atomic inner-shell physics, to be sure, lies in the significance of the fundamental problems that are coming within grasp. The large energies of many inner-shell processes cause relativistic and quantum-electrodynamic effects to become strong. Unique opportunities exist for delicate tests of such phenomena as the screening of the electron self-energy and the limits of validity of the present form of the frequency-dependent Breit interaction, to name but two. The many-body problem, which pervades virtually all of physics, presents somewhat less intractable aspects in the atomic inner-shell regime: correlations are relatively weak so that they can be treated perturbatively, and the basic potential is simple and known! The dynamics of inner-shell processes are characterized by exceedingly short lifetimes and high transition rates that strain perturbation theory to its limits and obliterate the traditional separation of excitation and deexcitation. These factors are only now being explored, as are interference phenomena between the various channels.
Download or read book Anomalous Positrons from Heavy Ion Collisions written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current status of the experimental study of anomalous lines observed in the spectra of positrons produced in heavy ion collisions is reviewed. A new experiment to measure positron-electron coincidences is discussed. 26 refs., 14 figs., 2 tabs.
