Theoretical Chemistry And Physics Of Heavy And Superheavy Elements
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| Author | : U. Kaldor |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 580 |
| Release | : 2013-06-29 |
| Genre | : Science |
| ISBN | : 9401701059 |
Quantum mechanics provides the fundamental theoretical apparatus for describing the structure and properties of atoms and molecules in terms of the behaviour of their fundamental components, electrons and nudeL For heavy atoms and molecules containing them, the electrons can move at speeds which represent a substantial fraction of the speed of light, and thus relativity must be taken into account. Relativistic quantum mechanics therefore provides the basic formalism for calculating the properties of heavy-atom systems. The purpose of this book is to provide a detailed description of the application of relativistic quantum mechanics to the many-body prob lem in the theoretical chemistry and physics of heavy and superheavy elements. Recent years have witnessed a continued and growing interest in relativistic quantum chemical methods and the associated computa tional algorithms which facilitate their application. This interest is fu elled by the need to develop robust, yet efficient theoretical approaches, together with efficient algorithms, which can be applied to atoms in the lower part of the Periodic Table and, more particularly, molecules and molecular entities containing such atoms. Such relativistic theories and computational algorithms are an essential ingredient for the description of heavy element chemistry, becoming even more important in the case of superheavy elements. They are destined to become an indispensable tool in the quantum chemist's armoury. Indeed, since relativity influences the structure of every atom in the Periodic Table, relativistic molecular structure methods may replace in many applications the non-relativistic techniques widely used in contemporary research.
| Author | : Matthias Schädel |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 530 |
| Release | : 2013-11-30 |
| Genre | : Science |
| ISBN | : 3642374662 |
The second edition of "The Chemistry of the Superheavy Elements" provides a complete coverage of the chemistry of a series of elements beginning with atomic number 104 – the transactinides or superheavy elements – including their nuclear properties and production in nuclear reactions at heavy-ion accelerators. The contributors to this work include many renowned scientists who, during the last decades, have made vast contributions towards understanding the physics and chemistry of these elusive elements, both experimentally and theoretically. The main emphasis here is on demonstrating the fascinating studies involved in probing the architecture of the Periodic Table at its uppermost end, where relativistic effects drastically influence chemical properties. All known chemical properties of these elements are described together with the experimental techniques applied to study these short-lived man-made elements one atom-at-a-time. The status of theoretical chemistry and of empirical models is presented as well as aspects of nuclear physics. In addition, one chapter outlines the meanderings in this field from a historical perspective and the search for superheavy elements in Nature.
| Author | : Matthias Schädel |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 324 |
| Release | : 2003-04-30 |
| Genre | : Science |
| ISBN | : 1402012500 |
This book is the first to treat the chemistry of superheavy elements, including important related nuclear aspects, as a self contained topic. It is written for those – students and novices -- who begin to work and those who are working in this fascinating and challenging field of the heaviest and superheavy elements, for their lecturers, their advisers and for the practicing scientists in the field – chemists and physicists - as the most complete source of reference about our today's knowledge of the chemistry of transactinides and superheavy elements. However, besides a number of very detailed discussions for the experts this book shall also provide interesting and easy to read material for teachers who are interested in this subject, for those chemists and physicists who are not experts in the field and for our interested fellow scientists in adjacent fields. Special emphasis is laid on an extensive coverage of the original literature in the reference part of each of the eight chapters to facilitate further and deeper studies of specific aspects. The index for each chapter should provide help to easily find a desired topic and to use this book as a convenient source to get fast access to a desired topic. Superheavy elements – chemical elements which are much heavier than those which we know of from our daily life – are a persistent dream in human minds and the kernel of science fiction literature for about a century.
| Author | : |
| Publisher | : Elsevier |
| Total Pages | : 805 |
| Release | : 2004-03-05 |
| Genre | : Science |
| ISBN | : 0080540473 |
The field of relativistic electronic structure theory is generally not part of theoretical chemistry education, and is therefore not covered in most quantum chemistry textbooks. This is due to the fact that only in the last two decades have we learned about the importance of relativistic effects in the chemistry of heavy and superheavy elements. Developments in computer hardware together with sophisticated computer algorithms make it now possible to perform four-component relativistic calculations for larger molecules. Two-component and scalar all-electron relativistic schemes are also becoming part of standard ab-initio and density functional program packages for molecules and the solid state. The second volume of this two-part book series is therefore devoted to applications in this area of quantum chemistry and physics of atoms, molecules and the solid state. Part 1 was devoted to fundamental aspects of relativistic electronic structure theory whereas Part 2 covers more of the applications side. This volume opens with a section on the Chemistry of the Superheavy Elements and contains chapters dealing with Accurate Relativistic Fock-Space Calculations for Many-Electron Atoms, Accurate Relativistic Calculations Including QED, Parity-Violation Effects in Molecules, Accurate Determination of Electric Field Gradients for Heavy Atoms and Molecules, Two-Component Relativistic Effective Core Potential Calculations for Molecules, Relativistic Ab-Initio Model Potential Calculations for Molecules and Embedded Clusters, Relativistic Pseudopotential Calculations for Electronic Excited States, Relativistic Effects on NMR Chemical Shifts, Relativistic Density Functional Calculations on Small Molecules, Quantum Chemistry with the Douglas-Kroll-Hess Approach to Relativistic Density Functional Theory, and Relativistic Solid State Calculations. - Comprehensive publication which focuses on new developments in relativistic quantum electronic structure theory- Many leaders from the field of theoretical chemistry have contributed to the TCC series- Will no doubt become a standard text for scientists in this field.
| Author | : Bernd A. Hess |
| Publisher | : John Wiley & Sons |
| Total Pages | : 336 |
| Release | : 2003-01-06 |
| Genre | : Science |
| ISBN | : |
Heavy atoms and their compounds are important in many areas of modern technology. Their versatility in the reactions they undergo is the reason that they can be found in most homogeneous and heterogeneous catalysts. Their magnetism is the decisive property that qualifies them as materials for modern storage devices. The phenomena observed in compounds of heavy atoms such as phosphorescence, magnetism or the tendency for high valency in chemical reactions can to a large extent be traced back to relativistic effects in their electronic structure. Thus, in many respects relativistic effects dominate the physics and chemistry of heavy atoms and their compounds. Chemists are usually aware of these phenomena. However, the theory behind them is not part of the standard chemistry curriculum and thus not widely known among experimentalists. Whilst the relativistic quantum theory of electronic structure is well established in physics, applications of the theory to chemical systems and materials have been feasible only in the last decade and their practical applications in connection with chemical experiment is somewhat out of sight of modern theoretical physics. Relativistic Effects in Heavy Element Chemistry and Physics intends to bridge the gap between chemistry and physics on the one hand and theory and experiment on the other. Topics covered include: - A broad range from quantum electrodynamics to the phenomenology of the compounds of heavy and superheavy elements; - A state-of-the-art survey of the most important theoretical developments and applications in the field of relativistic effects in heavy-element chemistry and physics in the last decade; - Special emphasis on the work of researchers in Europe and Germany in the framework of research programmes of the European Science Foundation and the German Science Foundation.
| Author | : Matthias Lein |
| Publisher | : |
| Total Pages | : 192 |
| Release | : 2005-01-01 |
| Genre | : Heavy elements |
| ISBN | : 9780473100278 |
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2016 |
| Genre | : |
| ISBN | : |
| Author | : Krishna Kumar |
| Publisher | : CRC Press |
| Total Pages | : 176 |
| Release | : 1989 |
| Genre | : Art |
| ISBN | : |
Provides a review of the experimental & theoretical investigations of superheavy elements, especially their nuclear aspects. Also presents many new theoretical aspects & predictions of the Dynamic Deformation Model, developed by the author. Specific heavy-ion fusion experiments, which may lead to the discovery of superheavy elements, are suggested.
| Author | : Gottfried Münzenberg |
| Publisher | : Manipal Universal Press |
| Total Pages | : 158 |
| Release | : 2018-08-01 |
| Genre | : Education |
| ISBN | : 9382460780 |
Today, we live in a time when natural elements, even the ones which are not found in Nature can be made artificially. Making chemical elements: a dream of mankind has come true. SuperHeavy Elements (SHE), much heavier than those in Nature, have recently been created and is the subject of this book. The author, an insider of SHE research, led the German group which discovered the first series of SHE created by cold fusion. The book takes you through the journey of discovering a new element and the historical development of the field. Besides picturing the author’s personal experiences, the book addresses the physics of the creation of the chemical elements in the universe and the artificial synthesis of SHE in the laboratory. This book is written for a broad readership to allow the readers to participate in the fascination and excitement of discovering a new SHE. The book is also educational as it includes basic physics and new developments of SHE research, besides the historical aspects of it. For those readers who are interested in more details of SHE research, a bibliography including popular scientific articles as well as original papers are introduced in the book.
| Author | : Walter Greiner |
| Publisher | : World Scientific |
| Total Pages | : 1171 |
| Release | : 1999-06-17 |
| Genre | : Science |
| ISBN | : 9814525308 |
This book reviews recent developments in the field of superheavy elements and the related phenomena of fission, cluster radioactivity, and drip line physics. Both the experimental and theoretical aspects are dealt with in detail. For the production of new elements in the laboratory, the process of cold compound nucleus formation is found to be most favorable both theoretically and experimentally. However, experimentally, hot fusion of nuclei has also been used. Both the physical and chemical methods of synthesizing new elements are discussed. The theoretical approaches considered here are those of the quantum-mechanical fragmentation theory, the self-consistent Hartree-Fock theory, and the relativistic mean field theory. Fission, a process inverse to the fusion of two nuclei, is also observed to be most favourably a cold phenomenon. Other important results are bi-modal fission and high n-multiplicity fission, which leads to the hyperdeformed scission mode. Cluster radioactivity is discussed both as a heavy cluster emission process and as super-asymmetric fission. The theory as well as the present experimental status are reviewed. Physics at drip lines is interesting not only for their structural properties but also for their use in the fusion of two nuclei; both aspects are discussed.
