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Books > Science & Mathematics > Physics > Nuclear structure physics
These seven lectures are intended to serve as an introduction for
beginning graduate students to the spectra of small molecules. The
author succeeds in illustrating the concepts by using language and
metaphors that capture and elegantly convey simple insights into
dynamics that lie beyond archival molecular constants. The lectures
can simultaneously be viewed as a collection of interlocking
special topics that have fascinated the author and his students
over the years. Though neither a textbook nor a scholarly
monograph, the book provides an illuminating perspective that will
benefit students and researchers alike.
Michael Schenk evaluates new technologies and methods, such as
cryogenic read-out electronics and a UV laser system, developed to
optimise the performance of large liquid argon time projection
chambers (LArTPC). Amongst others, the author studies the
uniformity of the electric field produced by a Greinacher
high-voltage generator operating at cryogenic temperatures,
measures the linear energy transfer (LET) of muons and the
longitudinal diffusion coefficient of electrons in liquid argon.
The results are obtained by analysing events induced by cosmic-ray
muons and UV laser beams. The studies are carried out with
ARGONTUBE, a prototype LArTPC in operation at the University of
Bern, Switzerland, designed to investigate the feasibility of drift
distances of up to five metres for electrons in liquid argon.
ThisvolumeisacollectionofarticlesoriginallypublishedonaSpecialIssueoftheAstrophysicsandSpaceScienceJournal.
It is intended to give a comprehensive overview of the current
state of knowledge in solar and stellar modelling, with the aim of
comparing and extending what we know from the detailed solar
modelling, made possible by the helioseismic tools and by the
recent analysis of the solar spectrum, to the modelling and
understanding of generic stellar structures and their evolution.
Particular emphasis is devoted to the role of the input physics,
and its relevant uncertainties, in the construction of stellar
models and in the resulting predictions for general observable
quantities. Issues related to convection, overshoot, diffusion and
settling of helium and heavy elements, rotation, chemical
composition and magnetic eld are extensively discussed. Large space
is dedicated to the application of helio- and asteroseismic
techniques as tools to prove the theory of the evolution and the
structure of the stars. Comments on prospects for future
improvements and re nements of the theoretical models are given,
focusing on the possibility of getting ever more precise
helioseismic and asteroseismic observations from ground and space.
The articles included in this volume are the results of the
HELAS-NA5 workshop 'Synergies between solar and stellar modelling'
held in Rome from 22nd to 26th of June 2009, which was an unique
occasion to gather the solar and the stellar physics communities to
discuss the urgent questions risen by recent photometric and
spectroscopic observational results.
Infrared spectroscopy is a new and innovative technology to study
protein folding/misfolding events in the broad arsenal of
techniques conventionally used in this field. The progress in
understanding protein folding and misfolding is primarily due to
the development of biophysical methods which permit to probe
conformational changes with high kinetic and structural resolution.
The most commonly used approaches rely on rapid mixing methods to
initiate the folding event via a sudden change in solvent
conditions. Traditionally, techniques such as fluorescence,
circular dichroism or visible absorption are applied to probe the
process. In contrast to these techniques, infrared spectroscopy
came into play only very recently, and the progress made in this
field up to date which now permits to probe folding events over the
time scale from picoseconds to minutes has not yet been discussed
in a book. The aim of this book is to provide an overview of the
developments as seen by some of the main contributors to the field.
The chapters are not intended to give exhaustive reviews of the
literature but, instead to illustrate examples demonstrating the
sort of information, which infrared techniques can provide and how
this information can be extracted from the experimental data. By
discussing the strengths and limitations of the infrared approaches
for the investigation of folding and misfolding mechanisms this
book helps the reader to evaluate whether a particular system is
appropriate for studies by infrared spectroscopy and which specific
advantages the techniques offer to solve specific problems.
Frontiers in Fusion Research provides a systematic overview of the
latest physical principles of fusion and plasma confinement. It is
primarily devoted to the principle of magnetic plasma confinement,
that has been systematized through 50 years of fusion research.
Frontiers in Fusion Research begins with an introduction to the
study of plasma, discussing the astronomical birth of hydrogen
energy and the beginnings of human attempts to harness the Sun's
energy for use on Earth. It moves on to chapters that cover a
variety of topics such as: * charged particle motion, * plasma
kinetic theory, * wave dynamics, * force equilibrium, and * plasma
turbulence. The final part of the book describes the
characteristics of fusion as a source of energy and examines the
current status of this particular field of research. Anyone with a
grasp of basic quantum and analytical mechanics, especially
physicists and researchers from a range of different backgrounds,
may find Frontiers in Fusion Research an interesting and
informative guide to the physics of magnetic confinement.
These lectures review the recently developed vector coherent state
method. The book is an excellent introduction to the field because
of the many examples treated in detail, in particular those from
nuclear and particle physics. These calculations will be welcomed
by researchers and graduate students. The author reviews the
concepts of coherent states of the Heisenberg algebra and shows
then that the vector coherent state method maps the higher symmetry
algebra into an n-dimensional harmonic oscillator algebra coupled
with a simple intrinsic symmetry algebra. The formulation involves
some vector (or analogous higher symmetry) coupling of the
intrinsic algebra with the n-dimensional oscillator algebra,
leading to matrix representations and Wigner coefficients of the
higher symmetry algebra expressed in terms of simple calculable
functions and recoupling coefficients for the simpler intrinsic
algebra.
Charge density analysis of materials provides a firm basis for the
evaluation of the properties of materials. The design and
engineering of a new combination of metals requires a firm
knowledge of intermolecular features. Recent advances in technology
and high-speed computation have made the crystal X-ray diffraction
technique a unique tool for the determination of charge density
distribution in molecular crystal. Methods have been developed to
make experimental probes capable of unraveling the features of
charge densities in the intra- and inter-molecular regions of
crystal structures. In Metal and Alloy Bonding - An Experimental
Analysis, the structural details of materials are elucidated with
the X-ray diffraction technique. Analyses of the charge density and
the local and average structure are given to reveal the structural
properties of technologically important materials. Readers will
gain a new understanding of the local and average structure of
existing materials. The electron density, bonding, and charge
transfer studies in Metal and Alloy Bonding - An Experimental
Analysis contain useful information for researchers in the fields
of physics, chemistry, materials science, and metallurgy. The
properties described in these studies can contribute to the
successful engineering of these technologically important
materials.
The fifteenth European Conference on Few-Body Problems in Physics
has taken place during the week of June 5th to 9th, in the lovely
village of Peniscola, approximately midway between Barcelona and
Valencia on the Mediterranean coast. This conference continues the
tradition initiated in 1972 at Budapest, where the first conference
took place, and followed in Graz (1973), Tiibingen (1975), Vlieland
(1976), Uppsala (1977), Dubna (1979), Sesimbra (1980), Fer- rara
(1981), Tbilisi (1984), Fontevraud (1987), Uzhgorod (1990), Elba
(1991) and Amsterdam (1993). During this week, a total of one
hundred and fifty one scientist were exchang- ing their knowledge
and initiatives in this broad field of Few-Body Physics. Even if
the name of the conference restricts its domain to Europe, there
has been an important participation of scientists from non-European
countries. A conference with more than twenty years of tradition is
already an au- tonomous being, with a noticeable inertia.
Nevertheless, it is a reasonable thought to bend this inertia
trying to introduce some innovation, of course, without any damage
to the basic structure and objectives of the conference.
In this volume seven leading theoreticians and experimenters review
the origin of the asymmetry of matter and antimatter in the Big
Bang, solar neutrinos, the physics of enormous densities and
temperatures in stars and of immense magnetic fields around
collapsed stars, strong electric fields in heavy ion collisions,
and the extreme conditions in quark-gluon plasmas. The articles
address nuclear and particle physicists, especially graduate
students, but also astrophysicists and cosmologists, since they
have to deal with events under the extreme physical conditions
discussed here.
In the present edition, a number of new features have been added.
First of all, a number of typographical errors that had crept into
the text have been corrected. More importantly, a number of new
examples, figures and smaller sections have been added. In
evaluating the two-body matrix elements which characterize the
residual interaction, attention has been paid to the multipole
expansion and insight into the importance of various multipoles is
presented. The 18 example of 0 is now worked out for all the
different angular momentum states in the section on configuration
mixing. Some additional comments on how to determine one- and
two-body matrix elements in jn configurations, on isospin and the
application of isospin to the study of light odd-odd nuclei are
included. In Chap. 3, a small section on the present use of
large-scale shell model calculations and a section on experimental
tests of how a nucleon actually moves inside the nucleus (using
electromagnetic probing of nucleonic motion) has been added. In
Chap. 4, some recent applications of the study of quadrupole motion
in jn particle systems (with reference to the Po, Rn, Ra nuclei)
are presented. In the discussion of magnetic dipole moments, the
effects and importance of collective admixtures are pointed out and
discussed. In Chap. 5, some small additions relating to the
particle-hole conjugation and to the basic Hartree-Fock theory have
been made. In Chap.
Scattering theory is of interest to physicists and to chemists and
has a wide variety of applications, but it also presents a
considerable challenge to mathematicians, including numerical
analysts. Within the Schroedinger picture in this volume are
collected the various theoretical and mathematical treatments of
scattering together with a host of reviews of its applications to
atomic and nuclear physics, to surface physics and chemistry, for
example trapping of atoms on surfaces, and to amorphous condensed
systems. The reviews give a concise and pedagogically useful
presentation of the state of the art, and may serve as
introductions for newcomers, in particular for graduate students.
This book introduces systematically the operator method for the
solution of the Schroedinger equation. This method permits to
describe the states of quantum systems in the entire range of
parameters of Hamiltonian with a predefined accuracy. The operator
method is unique compared with other non-perturbative methods due
to its ability to deliver in zeroth approximation the uniformly
suitable estimate for both ground and excited states of quantum
system. The method has been generalized for the application to
quantum statistics and quantum field theory. In this book, the
numerous applications of operator method for various physical
systems are demonstrated. Simple models are used to illustrate the
basic principles of the method which are further used for the
solution of complex problems of quantum theory for many-particle
systems. The results obtained are supplemented by numerical
calculations, presented as tables and figures.
This book begins with a very readable survey "The Sun Today" by
J.-C. Pecker. It is followed by thorough reviews from leading
experts covering theory and observations. The focus shifts from the
solar core, studied via neutrino emissions and helioseismology,
through the interface regions where it is believed the large-scale
magnetic fields are generated, to the corona, where most of the
high temperature phenomena characteristic of this region may be
studied directly. As energetic particles play such a vigorous role
in this part of the sun, a separate session was devoted to their
transport and storage in the corona.
Measuring the hydrogen content in materials is important both for
research and for various applications in material and surface
sciences, such as hydrogen embrittlement of steel, controlled
thermonuclear reaction first wall studies, and changed material
properties caused by dissolved hydrogen. Hydrogen is the most
difficult atomic species to analyze by traditional methods, but
nuclear physics methods are particularly suited for this purpose.
President of the Uzbek SSR Academy of Sciences P.K. Khabibullaev
and Professor B.G. Skorodumov discuss in this book the
characteristics of these methods, such as lower detection limits,
selectivity in respect to different isotopes, accuracy, depth
resolution and maximum detection depth. Examples of applications
that are dealt with include the determination of material humidity,
the dating of objects, the study of hydrogen diffusion including
non-stationary processes, and the investigation of changes in
material properties like superconductivity, plasticity and
electrical properties due to contamination by hydrogen.
Written in a pedagogical way, the articles in this book address
graduate students as well as researchers and are well suited for
seminar work. Subjects at the forefront of nuclear research,
bordering other areas of many-particle physics, such as electron
scattering at different energy scales, new physics with radioactive
beams, multifragmentation, relativistic nuclear physics, high spin
nuclear problems, chaos, the role of the continuum in nuclear
physics or recent calculations with the shell model are presented.
It is felt that the topics treated in this book address the main
future lines of development of nuclear physics.
In this volume, experimentalists and theoreticians discuss which
experiments and calculations are needed to make significant
progress in the field and also how experiments and theoretical
descriptions can be compared. The topics treated are the
electromagnetic production of Goldstone bosons, pion--pion and
pion--nucleon interactions, hadron polarizability and form factors.
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