Author: Satoru Sugano
Publisher: Elsevier
ISBN: 0323154794
Category : Science
Languages : en
Pages : 348
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Book Description
Multiplets of Transition-Metal Ions in Crystals provides information pertinent to ligand field theory. This book discusses the fundamentals of quantum mechanics and the theory of atomic spectra. Comprised of 10 chapters, this book starts with an overview of the qualitative nature of the splitting of the energy level as well as the angular behavior of the wavefunctions. This text then examines the problem of obtaining the energy eigenvalues and eigenstates of the two-electron systems, in which two electrons are accommodated in the t2g and eg shells in a variety of ways. Other chapters discuss the ligand-field potential, which is invariant to any symmetry operation in the group to which symmetry of the system belongs. This book discusses as well the approximate method of expressing molecular orbitals (MO) by a suitable linear combination of atomic orbitals (AO). The final chapter discusses the MO in molecules and the self-consistent field theory of Hartree–Fock. This book is a valuable resource for research physicists, chemists, electronic engineers, and graduate students.
Author: Mikhail G. Brik
Publisher: CRC Press
ISBN: 1000000737
Category : Science
Languages : en
Pages : 462
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Book Description
This book describes in detail the main concepts of theoretical spectroscopy of transition metal and rare-earth ions. It shows how the energy levels of different electron configurations are formed and calculated for the ions in a free state and in crystals, how group theory can help in solving main spectroscopic problems, and how the modern DFT-based methods of calculations of electronic structure can be combined with the semi-empirical crystal field models. The style of presentation makes the book helpful for a wide audience ranging from graduate students to experienced researchers. Performance of optical materials crucially depends on the impurity ions intentionally introduced into the crystalline host materials. The color of these materials, their emission and absorption spectra can be understood by analyzing the relations between the electronic properties of impurity ions and host crystal structure, which constitutes the main content of this book. It describes in detail the main concepts of theoretical spectroscopy of transition metal and rare earth ions.
Author: Nicolae M. Avram
Publisher: Springer Science & Business Media
ISBN: 3642308384
Category : Science
Languages : en
Pages : 278
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Book Description
"Optical Properties of 3d-Ions in Crystals: Spectroscopy and Crystal Field Analysis" discusses spectral, vibronic and magnetic properties of 3d-ions in a wide range of crystals, used as active media for solid state lasers and potential candidates for this role. Crystal field calculations (including first-principles calculations of energy levels and absorption spectra) and their comparison with experimental spectra, the Jahn-Teller effect, analysis of vibronic spectra, materials science applications are systematically presented. The book is intended for researchers and graduate students in crystal spectroscopy, materials science and optical applications. Dr. N.M. Avram is an Emeritus Professor at the Physics Department, West University of Timisoara, Romania; Dr. M.G. Brik is a Professor at the Institute of Physics, University of Tartu, Estonia.
Author: David Michael P. Mingos
Publisher: Springer Science & Business Media
ISBN: 3642273777
Category : Medical
Languages : en
Pages : 247
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Book Description
This book reviews current and future trends in modern chemical research, focusing on chemical structure and bonding. Covers development of electronic structure theories for transition metal complexes, orbital models and electronic structure theory and more.
Author: Roman Boča
Publisher: Elsevier
ISBN: 044333417X
Category : Science
Languages : en
Pages : 400
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Book Description
Electronic Energy Levels of Transition Metal Complexes guides the reader to understand how to comprehensively calculate (predict, reconstruct) electronic energy levels of separation between 0,1 to 30,000 cm-1 in d1 to d9 transition metal complexes. The applied apparatus helps to understand the individual effect of the interelectron repulsion, crystal field strength, spin-orbit coupling and the magnetic field for any symmetry. Symmetry labels can be attached to energy levels (eigenvalues) by analyzing the eigenvectors of the model Hamiltonian either at the level of crystal-field terms or crystal-field multiplets.This book includes basic formulae for matrix elements of the model Hamiltonian and a huge number of results presented as graphs identifying the order of the energy levels and their labelling using the group (double group) irreducible representations. Utilization of the generated energy levels in electron spectroscopy, electron spin resonance and magnetochemistry is presented. Massive modelling was done using the desktop computers. - Covers advanced methodology for general cases, electronic terms and spin-orbit multiplets in the crystal field of any symmetry, and extensive modelling - Analyzes extensive modeling of energy levels and magnetic functions fo complexes of lower symmetry - Presents energy level diagrams and magnetic functions are presented for the most important cases, such as the octahedron, elongated tetragonal pyramid, compressed tetragonal pyramid, tetrahedron, prolate bisphenoid, flattened bisphenoid, trigonal bipyramid, tetragonal bipyramid, and o-rhombic bypyramid for d1 to d9 systems
Author: Alexander Kaminskii
Publisher: CRC Press
ISBN: 1000141330
Category : Technology & Engineering
Languages : en
Pages : 586
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Book Description
By the end of the 1970s, crystalline lasers were widely used in science, engineering, medicine, and technology. The types of lasers used have continued to grow in number to include newly discovered crystalline hosts, previously known compounds generating at other spectral wavelengths, and broadband tunable stimulated emission. This has led to the creation of an extremely promising new generation of crystalline lasers that are both highly efficient and more reliable. The major part of this book is devoted to describing multilevel operating laser schemes for stimulated emission excitation in insulating crystals doped with lanthanide ions. The first part of Crystalline Lasers deals with the history of the physics and spectroscopy of insulating laser crystals. The chapters in the second part of the book present results from the study of Stark-energy levels of generating ions in laser crystals and their radiative and nonradiative intermanifold transition characteristics. This section includes extensive tabular data and reference information. Popular and novel operating schemes of crystalline lasers are covered in Part 3. In the chapters in the fourth part of the book, the newest technologies in the physics and engineering of crystalline lasers are considered. The results of investigations into laser action under selective excitations, miniature crystalline lasers, and the properties of nonlinear activated laser crystals are presented and analyzed. Crystalline Lasers summarizes and reviews the results of many years of research and studies of activator ions and multilevel operating laser schemes, and discusses exciting prospects of using these systems to create new types of crystalline lasers. This book will be of use to laser scientists and engineers, physicists, and chemical engineers.
Author: Zundu Luo
Publisher: Nova Publishers
ISBN: 9781600213267
Category : Science
Languages : en
Pages : 368
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Book Description
Solid-state laser and luminescent materials activated by rare-earth or transition metals ions are widely used for solid-state lasers, luminescent lamps, flat displays, optical fibre communication systems, and other photonic devices. The unique solid-state electronic properties enable the activators in solids to emit photons efficiently in visible and IR regions. The rapid advances in both materials science and optoelectronics, particularly, the development of new methods of material synthesis and device fabrication, have been stimulating the growing interests in the deep insights of spectroscopic properties of solid-state laser and luminescent materials. This book brings together essential and practical knowledge of spectroscopic physics. This includes, atomic spectroscopy, mathematical theory, rare earth ions in materials, light emission and absorption, spectral properties, non-radiative transitions and energy migration.
Author: Boris S. Tsukerblat
Publisher: Courier Corporation
ISBN: 048645035X
Category : Science
Languages : en
Pages : 465
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Book Description
This handbook on group theory is geared toward chemists and experimental physicists who use spectroscopy and require knowledge of the electronic structures of the materials they investigate. Accessible to undergraduate students, it takes an elementary approach to many of the key concepts. Rather than the deductive method common to books on mathematics and theoretical physics, the present volume introduces fundamental concepts with simple examples, relating them to specific chemical and physical problems. The text is centered on detailed analysis of examples. Since neither chemists nor spectroscopists require theorem proofs, very few appear here. Instead, the focus remains on the principal conclusions, their meaning, and their use. In keeping with the text's practical bias, the main results of group theory are presented in all sections as procedures, making possible their systematic and step-by-step-application. Each chapter contains problems that develop practical skill and provide a valuable supplement to the text.
Author:
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3112499867
Category : Science
Languages : en
Pages : 513
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Book Description
No detailed description available for "August 1".
Author: Ru-Shi Liu
Publisher: CRC Press
ISBN: 1000513556
Category : Technology & Engineering
Languages : en
Pages : 866
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Book Description
A benchmark publication, the first edition of the Phosphor Handbook, published in 1998, set the standard for references in the field. The second edition, updated and published in 2007, began exploring new and emerging fields. However, in the last 14 years, since the second edition was published, many notable advances and broader phosphor applications have occurred. Completely revised, updated, and expanded into three separate volumes, this third edition of the Handbook covers the most recent developments in phosphor research, characterization, and applications. This volume on ‘Experimental Methods for Phosphor Evaluation and Characterization’ addresses the theoretical and experimental methods for phosphor evaluation and characterization. The chapters in the book cover: First principle and DFT analysis of optical, structural, and chemical properties of phosphors Phosphor design and tuning through structure and solid solution Design for IR, NIR, and narrowband emission and thermally stable phosphors and nanophosphors Detailed illustration for measurement of the absolute photoluminescence quantum yield of phosphors Phosphor analysis through photoionization, high pressure, and synchrotron radiation studies
