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Books > Science & Mathematics > Physics > Atomic & molecular physics
This thesis presents the first measurement of charmed D0 meson production relative to the reaction plane in Pb-Pb collisions at the center-of-mass energy per nucleon-nucleon collision of sNN = 2.76 TeV. It also showcases the measurement of the D0 production in p-Pb collisions at sNN = 5.02 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement of the D0 azimuthal anisotropy with respect to the reaction plane indicates that low- momentum charm quarks participate in the collective expansion of the high-density, strongly interacting medium formed in ultra-relativistic heavy-ion collisions, despite their large mass. This behavior can be explained by charm hadronization via recombination with light quarks from the medium and collisional energy loss. The measurement of the D0 production in p-Pb collisions is crucial to separate the effect induced by cold nuclear matter from the final- state effects induced by the hot medium formed in Pb-Pb collisions. The D0 production in p-Pb collisions is consistent with the binary collision scaling of the production in pp collisions, demonstrating that the modification of the momentum distribution observed in Pb-Pb collisions with respect to pp is predominantly induced by final-state effects such as the charm energy loss.
This volume continues the tradition of the Advances series. It
contains contributions from experts in the field of atomic,
molecular, and optical (AMO) physics. The articles contain some
review material, but are intended to provide a comprehensive
picture of recent important developments in AMO physics. Both
theoretical and experimental articles are included in the volume.
The book provides a generalized theoretical technique for solving the fewbody Schroedinger equation. Straight forward approaches to solve it in terms of position vectors of constituent particles and using standard mathematical techniques become too cumbersome and inconvenient when the system contains more than two particles. The introduction of Jacobi vectors, hyperspherical variables and hyperspherical harmonics as an expansion basis is an elegant way to tackle systematically the problem of an increasing number of interacting particles. Analytic expressions for hyperspherical harmonics, appropriate symmetrisation of the wave function under exchange of identical particles and calculation of matrix elements of the interaction have been presented. Applications of this technique to various problems of physics have been discussed. In spite of straight forward generalization of the mathematical tools for increasing number of particles, the method becomes computationally difficult for more than a few particles. Hence various approximation methods have also been discussed. Chapters on the potential harmonics and its application to Bose-Einstein condensates (BEC) have been included to tackle dilute system of a large number of particles. A chapter on special numerical algorithms has also been provided. This monograph is a reference material for theoretical research in the few-body problems for research workers starting from advanced graduate level students to senior scientists.
This book focuses on the recent progress in nanophotonics technology to be used to develop novel nano-optical devices, fabrication technology, and security systems. It begins with a review of the concept of dressed photons and applications to devices, fabrication, and systems; principles and applications. Further topics include: DNA process for quantum dot chain, photon enhanced emission microscopy, near field spectroscopy of metallic nanostructure, self-organized fabrication of composite semiconductor quantum dots, formation of metallic nanostructure, and nanophotonic information systems with security. These topics are reviewed by seven leading scientists. This overview is a variable resource for engineers and scientists working in the field of nanophotonics.
This book presents an Ultrafast Low-Energy Electron Diffraction (ULEED) system that reveals ultrafast structural changes on the atomic scale. The achievable temporal resolution in the low-energy regime is improved by several orders of magnitude and has enabled the melting of a highly-sensitive, molecularly thin layer of a polymer crystal to be resolved for the first time. This new experimental approach permits time-resolved structural investigations of systems that were previously partially or totally inaccessible, including surfaces, interfaces and atomically thin films. It will be of fundamental importance for understanding the properties of nanomaterials so as to tailor their properties.
This monograph forms an interdisciplinary study in atomic, molecular, and quantum information (QI) science. Here a reader will find that applications of the tools developed in QI provide new physical insights into electron optics as well as properties of atoms & molecules which, in turn, are useful in studying QI both at fundamental and applied levels. In particular, this book investigates entanglement properties of flying electronic qubits generated in some of the well known processes capable of taking place in an atom or a molecule following the absorption of a photon. Here, one can generate Coulombic or fine-structure entanglement of electronic qubits. The properties of these entanglements differ not only from each other, but also from those when spin of an inner-shell photoelectron is entangled with the polarization of the subsequent fluorescence. Spins of an outer-shell electron and of a residual photoion can have free or bound entanglement in a laboratory.
This thesis sheds new light on the worldwide first electrical manipulation of a single nuclear spin. Over the last four decades, the size of a bit, the smallest logical unit in a computer, has decreased by more than two orders of magnitude and will soon reach a limit where quantum phenomena become important. Inspired by the power of quantum mechanics, researchers have already identified pure quantum systems, having, analog to a classical bit, two controllable and readable states. In this regard, the inherent spin of electrons or nuclei with its two eigenstates, spin up and spin down, is a promising candidate. Using expertise in the field of single-molecule magnets, the author developed a molecular transistor, which allows quantum information to be written onto a single nuclear spin by means of an electric field only, and, in addition, enables the electronic read-out of this quantum state. This novel approach opens a path to addressing and manipulating individual nuclear spins within a very confined space (a single molecule), at high speed. Thus, the author was able to show that single molecule magnets are promising candidates for quantum information processing, which is triggering a new field of research towards molecular quantum electronics.
This book appears in the year of de Broglie's hundredth birthday (Mr. Wave-Particle Duality, himself). Each chapter is by a different author. Paper titles include: Probability, Pseudoprobability, Mean Values; Local Vacua; Duality of Fluctuations, Fields, and More; The Aharonov-Bohm Effect From the Point of View of Local Realism; Unsharp Particle-Wa
This comprehensive book on Nanoclusters comprises sixteen
authoritative chapters written by leading researchers in the field.
It provides insight into topics that are currently at the cutting
edge of cluster science, with the main focus on metal and metal
compound systems that are of particular interest in materials
science, and also on aspects related to biology and medicine. While
there are numerous books on clusters, the focus on clusters as a
bridge across disciplines sets this book apart from others. Delivers cutting edge coverage of cluster science Covers a broad range of topics in physics, chemistry, and materials science Written by leading researchers in the field
In the first years after the discovery of radioactivity it became clear that nuclear physics was, by excellence, the science of small quantum systems. Between the fifties and the eighties nuclear physics and elementary particles physics lived their own lives, without much interaction. During this period the basic concepts were defined. Recently, contrary to the specialization law often observed in science, the overlap between nuclear and elementary particle physics has become somewhat blurred.
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.
This book is designed for advanced undergraduate and graduate
students in high energy heavy-ion physics. It is relevant for
students who will work on topics being explored at RHIC and the
LHC.
This book presents an overview of the physics of radiation
detection and its applications. It covers the origins and
properties of different kinds of ionizing radiation, their
detection and measurement, and the procedures used to protect
people and the environment from their potentially harmful effects.
It details the experimental techniques and instrumentation used in
different detection systems in a very practical way without
sacrificing the physics content. It provides useful formulae and
explains methodologies to solve problems related to radiation
measurements. With abundance of worked-out examples and
end-of-chapter problems, this book enables the reader to understand
the underlying physical principles and their applications. Detailed
discussions on different detection media, such as gases, liquids,
liquefied gases, semiconductors, and scintillators make this book
an excellent source of information for students as well as
professionals working in related fields. Chapters on statistics,
data analysis techniques, software for data analysis, and data
acquisition systems provide the reader with necessary skills to
design and build practical systems and perform data analysis.
The NATO ARW "Molecular Self-Organization in Micro-, Nano-, and Macro- Dimensions: From Molecules to Water, to Nanoparticles, DNA and Proteins" to commemorate Professor Alexander S. Davydov was held in Kiev, Ukraine, on 8-12 June, 2008, at the Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine. Theobjective ofthisNATOARWistounveilandformulatetheprincipalfeatures that govern myriads of the molecular self-organization processes in micro-, nano-, and macro-dimensions from the following key representatives such as liquid - ter and aqueous solutions, and molecular liquids, nanodots, nanoparticles including gold, solitons, biomolecules such as DNA and proteins, biopolymers and bios- sors, catalysis, molecular modeling, molecular devices, and thin ?lms, and to offer another, more advanced directions in computational, experimental, and technolo- cal areas of nano- and bioscience towards engineering novel and powerful molecular self-organized assemblies with tailored properties. Nanoscience is indeed one of the most important research and development fr- tiers in modern science. Simplistically, nanoscience is the science of small particles of materials of a size of nanometre. Molecular nanoscience and nanotechnology have brought to us the unprecedented experimental control of the structure of matter with novel extraordinary properties that open new horizons and new opportunities, and new ways to make things, particularly in our everyday life, to heal our bodies, and to care of the environment. Unfortunately, they have also brought unwelcome advances in weaponry and opened yet more ways to foul up the world on an en- mous scale.
This book takes the reader for a short journey over the structures of matter showing that their main properties can be obtained even at a quantitative level with a minimum background knowledge including, besides first year calculus and physics, the extensive use of dimensional analysis and the three cornerstones of science, namely the atomic idea, the wave-particle duality and the minimization of energy as the condition for equilibrium. Dimensional analysis employing the universal physical constants and combined with "a little imagination and thinking", to quote Feynman, allow an amazing short-cut derivation of several quantitative results concerning the structures of matter. In the current 2nd edition, new material and more explanations with more detailed derivations were added to make the book more student-friendly. Many multiple-choice questions with the correct answers at the end of the book, solved and unsolved problems make the book also suitable as a textbook. This book is of interest to students of physics, engineering and other science and to researchers in physics, material science, chemistry and engineering who may find stimulating the alternative derivation of several real world results which sometimes seem to pop out the magician's hat.
The Spectroscopy of H3+ (I. McNab). Supercooled Liquids (U. Mohanty). Ternary Systems Containing Surfactants (M. Laradji, et al.). Colored Noise in Dynamical Systems (P. Hänggi & P. Jung). Formulation of Oscillatory Reaction Mechanisms by Deduction from Experiments (J. Stemwedel, et al.). Indexes.
The present book describes a large variety of different types of
chain systems (nanowires), including shorter chains that are
artificially produced for instance in break-junction experiments,
chains synthesized as guests inside the channels of a host crystal,
crystalline chain compounds, organic polymers (synthetic metals),
and charge-transfer salts, thus covering an unusual wealth of
systems. Both experimental and theoretical studies are discussed.
Particular emphasis is put on illustrating the special phenomena
that occur in such quasi-one-dimensional systems, and how
theoretical and experimental efforts have been used in identifying
those properties that are specific for truly one-dimensional
systems from those of quasi-one-dimensional systems. Moreover, it
is shown that metallic chains can be found in a large range of
systems, but also that chains of metals not always are metallic.
This book describes the benefits of using a new type of solid-state multichannel detector, i.e., the charge-transfer device, as it is used for chemical imaging and analysis.
Klaus von Klitzing Max-Planck-Institut fur ] Festk] orperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany Already many Cassandras have prematurely announced the end of the silicon roadmap and yet, conventional semiconductor-based transistors have been continuously shrinking at a pace which has brought us to nowadays cheap and powerful microelectronics. However it is clear that the traditional scaling laws cannot be applied if unwanted tunnel phenomena or ballistic transport dominate the device properties. It is generally expected, that a combination of silicon CMOS devices with molecular structure will dominate the ?eld of nanoelectronics in 20 years. The visionary ideas of atomic- or molecular-scale electronics already date back thirty years but only recently advanced nanotechnology, including e.g. scanning tunneling methods and mechanically controllable break junctions, have enabled to make distinct progress in this direction. On the level of f- damentalresearch, stateofthearttechniquesallowtomanipulate, imageand probechargetransportthroughuni-molecularsystemsinanincreasinglyc- trolled way. Hence, molecular electronics is reaching a stage of trustable and reproducible experiments. This has lead to a variety of physical and chemical phenomena recently observed for charge currents owing through molecular junctions, posing new challenges to theory. As a result a still increasing n- ber of open questions determines the future agenda in this ?eld."
One of the aims of this book was to focus the attention of
specialists to the diversity of the effects of the ionising
radiation on biological and physical systems. Special emphasis has
been placed on the exquisite complexities/differences introduced by
high ionisation density versus low ionisation density irradiation
in both biological and physical systems (Scholz - Chapter 1,
Horowitz - Chapter 2, Olko - Chapter 3). As well we wanted to point
out the need for novel experimental and theoretical approaches
required to advance the important fields of micro and
nanodosimetry. Important first steps have already been taken, for
example, the accelerated application of semiconductor detectors in
their various forms to microdosimetry and as well to practical,
important applications in the radiation dosimetry of oncological
procedures (Rosenfeld - Chapter 6). The vast number of applications
of TLD to radiation dosimetry are not neglected; a special chapter
is devoted to the application of TLDs to medical dosimetry
applications (Mobit and Kron - Chapter 7) as well as a tutorial
approach in an additional chapter to the cavity theories required
to extrapolate dose from the detector medium to the tissue medium
(Mobit and Sandison - Chapter 5). One of the major features of this
book is the intensive, in depth, coverage of the theory and
modelling of TL both from the solid state physics point of view
(Chen - Chapter 4) and the microdosimetic point of view (Horowitz -
Chapter 2 and Olko - Chapter 3). The many puzzling, quaint,
quizzical features of TL science can now be understood in the
framework of these advanced theoretical models, explained in
straightforward, understandable terms.
This text provides the reader with a comprehensive understanding of the key ideas behind the physics of particle accelerators. Supported by a clear mathematical treatment and a range of calculations which develop a genuine feeling for the subject, it is a thorough introduction to the many aspects of accelerator physics.
In the present work, the target station of the accelerator-driven neutron source HBS is optimized in comprehensive parameter studies using the Monto-Carlo method. The dependence of the most important performance characteristics of such a system on the external parameters is investigated neglecting technical and mechanical limitations. In this way, qualitative and quantitative statements for all possible configurations and envisaged applications can be derived and should be considered in the detailed planning of such facilities. For this purpose, different scenarios are considered that place completely different requirements on the design of the target station. The central statements derived in this thesis can be transferred to any framework conditions, such as different accelerator energies, so that these results can be used in the development of other neutron sources, which together with the HBS form a European network and provide a prosperous community in neutron science.
This second edition is a thoroughly revised, updated and expanded version of a classic text, with lots of new material on electronic signal creation, amplification and shaping. It 's still a thorough general introduction, too, to the theory and operation of drift chambers. The topics discussed include the basics of gas ionization, electronic drift and signal creation and discuss in depth the fundamental limits of accuracy and the issue of particle identification.
The book is a comprehensive edition which considers the interactions of atoms, ions and molecules with charged particles, photons and laser fields and reflects the present understanding of atomic processes such as electron capture, target and projectile ionisation, photoabsorption and others occurring in most of laboratory and astrophysical plasma sources including many-photon and many-electron processes. The material consists of selected papers written by leading scientists in various fields. |
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