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Books > Science & Mathematics > Physics > Atomic & molecular physics
This book examines the motivation for electron scattering and develops the theoretical analysis of the process. It discusses our current theoretical understanding of the underlying structure of nuclei and nucleons at appropriate levels of resolution and sophistication, and summarizes present experimental electron scattering capabilities. Only a working knowledge of quantum mechanics and special relativity is assumed, making this a suitable textbook for graduate and advanced undergraduate courses.
This thesis unifies the dissipative dynamics of an atom, particle
or structure within an optical field that is influenced by the
position of the atom, particle or structure itself. This allows the
identification and exploration of the fundamental 'mirror-mediated'
mechanisms of cavity-mediated cooling leading to the proposal of a
range of new techniques based upon the same underlying principles.
It also reveals powerful mechanisms for the enhancement of the
radiation force cooling of micromechanical systems, using both
active gain and the resonance of a cavity to which the cooled
species are external. This work has implications for the cooling
not only of weakly-scattering individual atoms, ions and molecules,
but also for highly reflective optomechanical structures ranging
from nanometre-scale cantilevers to the metre-sized mirrors of
massive interferometers.
The contents of this book are the result of work performed in the
past three years to provide some answers to questions raised by
several colleagues wo- inginastrophysics.
Examiningseveraltransportprocessesinplasmasrelated to dissipative
e?ects in phenomena such as cooling ?ows, propagation of sound
waves, thermal conduction in the presence of magnetic ?elds, an-
lar momentum transfer in accretion disks, among many, one ?nds a
rather common pattern. Indeed when values for transport coe?cients
are required the overwhelming majority of authors refer to the
classical results obtained by L. Spitzer and S. Braginski over
forty years ago. Further, it is also often mentioned that under the
prescribed working conditions the values of such coe?cients are
usually insu?cient to provide agreement with observations. The
methodology followed by these authors is based upon Landau's -
oneering idea that collisions in plasmas may be substantially
accounted for when viewed as a di?usive process. Consequently the
ensuing basic kinetic equation is the Fokker-Planck version of
Boltzmann's equation as essentially proposed by Landau himself
nearly 70 years ago. Curiously enough the magni?cent work of the
late R. Balescu in both Classical and Non-Classical transport in
plasmas published in 1988 and also based on the Fokker-Planck
equation is hardly known in the astrophysical audience. The
previous work of Spitzer and Braginski is analyzed with much more
rigorous vision in his two books on the subject.
Elliptical Flow: A Probe of the Pressure in Ultrarelativistic
Nucleus-Nucleus Collisions; H. Sorge. A Study of Low-Mass Dileptons
at the CERn SPS; J. Murray, et al. Exclusive Study of Heavy Ion
Collisions Using 2-8 AGeV Au Beams: Status of AGS Experiment E895;
M. Kaplan. Analysis of the d/p Ratios in Au+Au Collisions at 11.1
GeV/c; E.J. Garcia-Solis. Recent Results from CERn-WA98; P.
Stankus. Event-by-Event Physics at the CERN SPS; T. Trainor.
Nuclear Temperature Measurement and Secondary Decay; X. Hongfei, et
al. Net Proton and Negatively-Charged Hadron Spectra from the NA49
Experiment; M. Toy. Sequential and Pre-Equilibrion Nucleon Emission
in Sn+Ca Reactions at 35 A MeV; D. Agnihotri, ete al. Dissipative
Collisions and Multifragmentationi n the Fermi Energy Domain; W.
Skulski. Fermionic Molecular Dynamics: Multifragmentation in
Heavy-Ion Collisions and in Excited Nuclei; H. Felmeier, J.
Schnack. Apparent Temperatures in Hot Quasi-Projectiles and the
Caloric Curve; J. Peter, et al. Baryon Production in High Energy
Pb-Pb Collissions - Recent Results from NA44; E.B. Holzer.
Strangeness Production and Flow in Heavy-Ion Collisions; G.Q. Li,
et al. Semihard Processes in Nuclear Collisions; K. Werner. 17
Additional Articles. Index.
The discovery of Bose Einstein condensation (BEC) in trapped
ultracold atomic gases in 1995 has led to an explosion of
theoretical and experimental research on the properties of
Bose-condensed dilute gases. The first treatment of BEC at finite
temperatures, this book presents a thorough account of the theory
of two-component dynamics and nonequilibrium behaviour in
superfluid Bose gases. It uses a simplified microscopic model to
give a clear, explicit account of collective modes in both the
collisionless and collision-dominated regions. Major topics such as
kinetic equations, local equilibrium and two-fluid hydrodynamics
are introduced at an elementary level. Explicit predictions are
worked out and linked to experiments. Providing a platform for
future experimental and theoretical studies on the finite
temperature dynamics of trapped Bose gases, this book is ideal for
researchers and graduate students in ultracold atom physics,
atomic, molecular and optical physics and condensed matter physics.
Intended to provide scientists and engineers at synchrotron
radiation facilities with a sound and convenient basis for
designing beamlines for monochromatic soft x-ray radiation, this
text will also be helpful to the users of synchrotron radiation who
want to help ensure that beamlines being built are optimized for
the experiments to be performed on them. The primary purpose of a
beamline is to capture as much of the light of the source as
possible and then to transfer the desired portion of that light as
completely as possible to the experiment. With the development of
dedicated, brilliant synchrotron radiation sources, the first half
of the task has been greatly simplified. The beamline designer must
contend with the second half of the problem -- conserving the
brilliance of the source through an optical system which
monochromatizes and focuses the radiation.
This textbook on optics provides an introduction to key concepts of
wave optics and light propagation. It uniquely makes extensive use
of Fourier methods and the angular-spectrum approach, especially to
provide a unified approach to Fraunhofer and Fresnel diffraction. A
recurring theme is that simple building blocks such as plane and
spherical waves can be summed to construct useful solutions. The
text pays particular attention to analysing topics in contemporary
optics such as propagation, dispersion, laser beams and wave
guides, apodisation, tightly-focused vector fields, unconventional
polarization states, and light-matter interactions. Throughout the
text, the principles are applied through worked examples, and the
book is copiously illustrated with more than 240 figures. The 200
end-of-chapter exercises offer further opportunities for testing
the reader's understanding.
Computational Atomic Structure: An MCHF Approach deals with the
field of computational atomic structure, specifically with the
multiconfiguration Hartree-Fock (MCHF) approach and the manner in
which this approach is used in modern physics. Beginning with an
introduction to computational algorithms and procedures for atomic
physics, the book describes the theory underlying nonrelativistic
atomic structure calculations (making use of Brett-Pauli
corrections for relativistic effects) and details how the MCHF
atomic structure software package can be used to this end. The book
concludes with a treatment of atomic properties, such as energy
levels, electron affinities, transition probabilities, specific
mass shift, fine structure, hyperfine-structure, and
autoionization. This modern, reliable exposition of atomic
structure theory proves invaluable to anyone looking to make use of
the authors' MCHF atomic structure software package, which is
available publicly via the Internet.
The application of nuclear physics methods is now widespread
throughout physics, chemistry, metallurgy, biology, clinical
medicine, geology, and archaeology. Accelerators, reactors, and
various instruments that have developed together with nuclear
physics have often been found to offer the basis for increasingly
productive and more sensitive analytical techniques.
Nuclear Methods in Science and Technology provides scientists and
engineers with a clear understanding of the basic principles of
nuclear methods and their potential for applications in a wide
range of disciplines.
The first part of the book covers the major points of basic theory
and experimental methods of nuclear physics, emphasizing concepts
and simple models that give a feel for the behavior of real
systems. Using many examples, the second part illustrates the
extraordinary possibilities offered by nuclear methods. It covers
the Mossbauer effect, slow neutron physics, activation analysis,
radiography, nuclear geochronology, channeling effects, nuclear
microprobe, and numerous other topics in modern applied nuclear
physics. The book explores applications such as tomography, the use
of short-lived isotopes in clinical diagnoses, and nuclear physics
in ecology and agriculture. Where alternative nonnuclear analytical
techniques are available, the author compares the relevant nuclear
method, enabling readers to judge which technique may be most
useful for them.
Complete with a bibliography and extensive reference list for
readers who want to delve deeper into a particular topic, this book
applies various methods of nuclear physics to a wide range of
disciplines.
Computational Atomic Structure: An MCHF Approach deals with the
field of computational atomic structure, specifically with the
multiconfiguration Hartree-Fock (MCHF) approach and the manner in
which this approach is used in modern physics. Beginning with an
introduction to computational algorithms and procedures for atomic
physics, the book describes the theory underlying nonrelativistic
atomic structure calculations (making use of Brett-Pauli
corrections for relativistic effects) and details how the MCHF
atomic structure software package can be used to this end. The book
concludes with a treatment of atomic properties, such as energy
levels, electron affinities, transition probabilities, specific
mass shift, fine structure, hyperfine-structure, and
autoionization. This modern, reliable exposition of atomic
structure theory proves invaluable to anyone looking to make use of
the authors' MCHF atomic structure software package, which is
available publicly via the Internet.
The authors expound on non-traditional phenomena for transfer
theory, which are nevertheless of considerable interest in wave
measurements, and bring the advances of transfer theory as close as
possible to the practical needs of those working in all areas of
wave physics. The book opens with a historical overview of the
topic, then moves on to examine the phenomenological theory of
radiative transport, blending traditional theory with original
ideas. The transport equation is derived from first principles, and
the ensuing discussion of the diffraction content of the transport
equation and non-classical radiometry is illustrated by practical
examples from various fields of physics. Popular techniques of
solving the transport equation are discussed, paying particular
attention to wave physics and computing the coherence function. The
book also examines various problems which are no longer covered by
the traditional radiative transfer theory, such as enhanced
backscattering and weak localization phenomena, nonlinear transport
problems and kinetic equations for waves. This monograph bridges
the gap between the simple power balance description in radiative
transfer theory and modern coherence theory. It will be of interest
to researchers and professionals working across a wide range of
fields from optics, acoustics and radar theory to astrophysics,
radioastronomy and remote sensing, as well as to students in these
areas.
Management of Naturally Occurring Radioactive Materials - known in
the industry as NORM -has become an important part of the regular
training required for workers in oil and gas production, refinery
and petrochemical manufacturing, and in certain types of mining.
Proper handling of NORM-contaminated wastes and use of appropriate
radiation detection and protective equipment are now understood to
be important components of good worker safety programs. Until now,
no practical, easy-to-read, book was available to supplement worker
training courses on NORM management. Naturally Occurring
Radioactive Materials: Principles and Practices fills this void by
providing, in a single publication, an ideal reference for industry
managers, supervisors and line personnel. The book stresses the
proper handling and management of NORM contaminated wastes and
provides a firm understanding of the chemical properties of
radioactive agents, their toxicological effects, and the
appropriate containerization and disposal methods for these
materials.
"New physics" is an appealing new keyword, not yet devalued by the
ravages of inflation. But what has this to do with such an ugly
field as plasma physics, steeped in classical physics, mostly
outworn, with all its unsolved and ambiguous technological problems
and its messy and open ended numerical studies? "New physics" is
concerned with quarks, Higgs particles, grand unified theory, super
strings, gravitational waves, and the profound basics of cosmology
and black holes. It is the field of astonishing quantum effects,
demonstrated by the von Klitzing effect and high temperature
superconductors. But what can plasma physicists offer, after so
many years of expensive and frustrating research to solve the
problem of fusion energy? One may suggest that the fascinating
research ofchaos with applications to plasma, or the achievements
of statistical mechanics applied to plasmas, has something to offer
and should be the subject of attention. However, this is not the
aim of this book. Complementing the traditional aim of physics,
which is to interpret the phenomena of nature by generalizing laws
such that exact predictions about new properties and effects can be
drawn, this book demonstrates how new physics has been derived over
the last 30 years from the state of matter which exists at high
temperatures (plasma).
Electron collisions with atoms, ions, and molecules have been
investigated since the earliest years of the last century because
of their pervasiveness and importance in fields ranging from
astrophysics and plasma physics to atmospheric and condensed matter
physics. Written in an accessible yet rigorous style, this book
introduces the theory of electron-atom scattering into both the
non-relativistic and relativistic quantum frameworks. The book also
includes exercises with an increasing degree of difficulty to allow
the reader to become familiar with the subject.
This book deals specifically with the manipulation of atoms by
laser light, describing the focusing, channeling and reflection of
atoms by laser fields. It also describes the potential fields
required to cause the phase change of the wave function necessary
for the atomic interactions to occur.
This important book presents on approach to understanding the
atomic nucleus that exploits simple algebraic techniques. The book
focuses primarily on a panicular algebraic model, the Interacting
Boson Model (IBM); ft outlines the algebraic structure, or group
theoretical basis, of the IBM and other algebraic models using
simple examples. Both the compa6son of the IBM with empirical data
and its microscopic basis are explored, as are extensions to odd
mass nuclei and to phenomena not originally encompassed within its
purview. An important final chapter treats fermion algebraic
approaches to nuclear structure which can be both more microscopic
and more general, and which represent Promising avenues for future
research. Each of the contributors to this work is a leading expert
in the field of algebraic models; together they have formulated an
introduction to the subject which will be an important resource for
the series graduate student and the professional physicist alike.
This book offers a compact overview on crystallography, symmetry,
and applications of symmetry concepts. The author explains the
theory behind scattering and diffraction of electromagnetic
radiation. X-ray diffraction on single crystals as well as
quantitative evaluation of powder patterns are discussed.
The content of this book describes in detail the results of the
present measurements of the partial and total doubly differential
cross sections for the multiple-ionization of rare gas atoms by
electron impact. These measurements show, beside other trends, the
role of Auger transitions in the production of multiply ionized
atoms in the region where the incident electron energy is
sufficient to produce inner shell ionization. Other processes like
Coster-Kronig transitions and shake off also contribute towards
increasing the charge of the ions. The incident electron having
energy of 6 keV, for example, in a collision with xenon atom can
remove up to nine electrons (*) X-ray-ion coincidence spectroscopy
of the electron xenon atom collisions is also described.
The present measurements of doubly differential cross sections
for the dissociative and non-dissociative ionization of hydrogen,
sulfur dioxide and sulfur hexa fluoride molecular gases by electron
impact are also described in the text of this book. The results of
the measurements for sulfur dioxide molecule show how this major
atmospheric pollutant can be removed from the atmosphere by
electron impact dissociation of this molecule. The present results
of the measurements for sulfur hexa fluoride give an insight into
the dissociation properties of this molecular gas, which is being
so widely used as a gaseous insulator in the electrical
circuits.
The book also describes the present measurements of the
polarization parameters of the fluorescence radiation emitted by
the electron-impact-excited atoms of sodium and potassium. In these
investigations the target atoms are polarized, therefore, the
measurements of the polarization parameters give information about
the electron atom interaction in terms of the interference, direct
and exchange interaction channels.
Nuclear physics is undoubtedly a many-body problem. A nice
introduction into the present status of this subject may be found
in the comprehensive mono graph by P. Ring and P. Schuck "The
Nuclear Many-Body Problem" (Springer, Berlin, Heidelberg, New York
1980). However, in view of the many challenging problems that
remain to be tackled, it is sensible to consider systems with few
particles as model cases. These provide the basis for solving the
sophisticated many-body problem posed by intermediate and heavy
nuclei. Out of the large number of existing nuclear systems,
few-particle, that is few-nucleon, systems can be singled out to
form a special group. This is possi ble because a comparatively
small number of degrees of freedom (or dynamic variables) is
required for a complete description of such systems. In these
Lectures we utilize this to study few-body systems in great detail,
in particular three-and four-body systems. In contrast to published
monographs on the subject, we deal not just with nucleonic degrees
of freedom but consider also non-nucleonic degrees of freedom. The
range of approaches and methods examined exceeds the scope of other
textbooks. The Lectures are organized in such a way as to guide the
uninitiated reader through the essentials of solving the dynamical
equations of few-body systems directly towards practical
applications. Formally oriented readers might like to supplement
their reading with texts such as "The Quantum Mechanical Few Body
Problem" by W. GlOckle (Springer, Berlin, Heidelberg, New York
1983)."
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