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By providing the reader with a foundational background in high spin nuclear structure physics and exploring exciting current discoveries in the field, this book presents new phenomena in a clear and compelling way. The quest for achieving the highest spin states has resulted in some remarkable successes which this monograph will address in comprehensive detail. The text covers an array of pertinent subject matter, including the rotational alignment and bandcrossings, magnetic rotation, triaxial strong deformation and wobbling motion and chirality in nuclei. This book offers a clearly-written and up-to-date treatment of the topics covered. The prerequisites for a proper appreciation are courses in nuclear physics and nuclear models and measurement techniques of observables like gamma-ray energies, intensities, multi-fold coincidences, angular correlations or distributions, linear polarization, internal conversion coefficients, short lifetime (pico-second range) of excited states etc. and instrumentation and data analysis methods.
The work presented in this thesis established the existence of wobbling at low spin and low deformation in the Z~60, N~76 nuclear region. This opens the region to further searches for wobbling and shows that wobbling is not confined to a particular quasiparticle orbital, spin or deformation. While deformed nuclei usually have axial shape, triaxial shapes have been predicted at low to moderate spins in certain regions of the nuclear chart (e.g. Z~60, N~76 and Z~46, N~66). Observation of one of the fingerprints of triaxiality, chirality and wobbling, guarantees that the nucleus is axially asymmetric. While chirality has been observed in numerous nuclei from many regions of the nuclear chart, wobbling, prior to this work, had only been observed at high spins in super deformed bands in five nuclei confined to the Z~70, N~90 region. Additionally, this dissertation establishes a new interpretation for the wobbling phenomenon. It shows for the first time that the nucleon aligns to the short axis, which explains the decrease in wobbling energies with angular momentum seen on this and all previous wobbling nuclei while still explaining the observed B(E2out)B(E2in) ratios. This is a new phenomenon, which is in contrast to the increase of the wobbling energies predicted by Bohr and Mottelson.
Dramatic progress has been made in all branches of physics since the National Research Council's 1986 decadal survey of the field. The Physics in a New Era series explores these advances and looks ahead to future goals. The series includes assessments of the major subfields and reports on several smaller subfields, and preparation has begun on an overview volume on the unity of physics, its relationships to other fields, and its contributions to national needs. Nuclear Physics is the latest volume of the series. The book describes current activity in understanding nuclear structure and symmetries, the behavior of matter at extreme densities, the role of nuclear physics in astrophysics and cosmology, and the instrumentation and facilities used by the field. It makes recommendations on the resources needed for experimental and theoretical advances in the coming decade.
This book proposal was originally forwarded from Andrew Durnell in 1991. It is different to the competition in style, progressing logically from general nuclear properties to nuclear structure, and in content, choosing to treat the major topics in sufficient depth for the student to obtain further understanding. The logical approach, linking general nuclear properties and nuclear structure is a benefit. The careful selection of topics, well-chosen illustrations, box features containing recent research examples and results, and tested problems, together provide a complete introduction to the major concepts and ideas required to understand nuclear physics. The author is careful throughout to keep nuclear physics in context with other disciplines, and to present the subject area as dynamic and interesting, through the use of box features. Series Editor Comment "advanced text suitable for final year courses and for introductory postgraduate studies" (Hamilton) "the range and depth of cover appear ideal and Heyde's approach is excellent ... a good teacher and text follows very much his style ... he also looks forward to the frontiers ... important in a (post) graduate text ... a student can see where his own particular topic may fit in ... many texts are far removed from research ... wealth and choice of figures ... good diagrams can do a lot for a text ... level of mathematics will ensure that it can be widely used"
Nuclear structure physics is undergoing a major revival, full of activities and excitement. On the experimental side, this is being made possible by advances in detector technology and accelerator capabilities that give access to data and nuclei (especially exotic nuclei far from stability) never before accessible. On the theoretical side, new concepts, ideas and computational techniques are advancing our understanding of effective interactions, nucleonic correlations, and symmetries of structure.This volume covers a broad range of topics on nuclear structure, including collective excitations, proton-neutron excitation modes, phase transitions, signatures of structure, isospin, structure at both high and low angular momenta, recent developments in nuclear theory, the vast new realm of exotic nuclei far from the valley of stability, and the latest technological advances of detectors and facilities which will lead this branch of physics into the future.
Contents: Secondary beams of rare isotopes; Nucleus-nucleus scattering at high energies; Sizes and energies of exotic nuclei; Break-up reactions and momentum distributions; Borromean nuclei; Coulomb excitation; Coulomb excitation of exotic nuclei; Elastic and inelastic scattering; Pion production; Tests of fundamental interactions; Nuclear astrophysics; Fusion reactions; Formation of heavy and superheavy elements; Subject index.
Several hundred nuclear scientists from more than a dozen countries met in Miami Beach, Florida, in September 1989 for a Symposium on Exotic Nuclear Spectroscopy, sponsored by the Division of Nuclear Chemistry and Technology of the Amencan Chemical Society. Braving five days of beckoning beaches, they presented, listened to, and discussed a series spectroscopy-both experimental and of invited papers covering the renaissance of nuclear theoretical-that has occurred during the past decade and which promises to continue well into the decade to come. This book contains the Proceedings of that Symposium on Exotic Nuclear Spectroscopy. But it is much more: During the ensuing six months, most of the pa{>ers were rewritten, polished, and/or expanded; so the resulting book is a much more fimshed, comprehensive, and up-to-date product than a general proceedings. Chapter se~uences follow the original symposium program, which, with a few exceptions, juxtaposes like topics. Each chapter can stand more or less on its own-although, as in any complex, interrelated scientific field, there are many cross-references among chapters. The manuscripts were edited and then uniformly typed in the Department of Chemistry at Michigan State University. I tried to keep the editing to a minimum so as to preserve the flavor of individual styles. A great debt of gratitude goes to those who helped make this volume possible, especially to Vada O'Donnell, who bore the largest burden of typing (and clarifying) the manuscripts.
The principal goals of the study were to articulate the scientific rationale and objectives of the field and then to take a long-term strategic view of U.S. nuclear science in the global context for setting future directions for the field. Nuclear Physics: Exploring the Heart of Matter provides a long-term assessment of an outlook for nuclear physics. The first phase of the report articulates the scientific rationale and objectives of the field, while the second phase provides a global context for the field and its long-term priorities and proposes a framework for progress through 2020 and beyond. In the second phase of the study, also developing a framework for progress through 2020 and beyond, the committee carefully considered the balance between universities and government facilities in terms of research and workforce development and the role of international collaborations in leveraging future investments. Nuclear physics today is a diverse field, encompassing research that spans dimensions from a tiny fraction of the volume of the individual particles (neutrons and protons) in the atomic nucleus to the enormous scales of astrophysical objects in the cosmos. Nuclear Physics: Exploring the Heart of Matter explains the research objectives, which include the desire not only to better understand the nature of matter interacting at the nuclear level, but also to describe the state of the universe that existed at the big bang. This report explains how the universe can now be studied in the most advanced colliding-beam accelerators, where strong forces are the dominant interactions, as well as the nature of neutrinos.
Broken up in to three sections, The Science of the Cold Fusion Phenomenon gives a unified explanation of all the significant data on the Cold Fusion Phenomena to date. It presents a history of the Cold Fusion Phenomenon (CFP), gives the fundamental experimental results of the CFP and presents a quantum mechanical treatment of physical problems associated with cold fusion. - Overviews the abundance of research and investigation that followed the 'cold fusion scandal' in 1989 - Explores the fundamental science behind the original Fleischmann experiment
The aim of this book is to provide a single reference source for the wealth of geometrical formulae and relationships that have proven useful in the descrip tion of atomic nuclei and nuclear processes. While many of the sections may be useful to students and instructors it is not a text book but rather a reference book for experimentalists and theoreticians working in this field. In addition the authors have avoided critical assessment of the material presented except, of course, by variations in emphasis. The whole field of macroscopic (or Liquid Drop Model) nuclear physics has its origins in such early works as [Weizsacker 35] and [Bohr 39]. It continued to grow because of its success in explaining collective nuclear excitations [Bohr 52] and fission (see the series of papers culminating in [Cohen 62]). These develop ments correspond to the first maximum in the histogram below, showing the distribution by year of the articles cited in our Bibliography. After the Liquid Drop Model had been worked out in some detail the development of the Struti nsky approach [Strutinsky 68] (which associates single particle contributions to the binding energy with the shape of the nucleus) gave new life to the field. The growth of interest in heavy-ion reaction studies has also contributed.