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Books > Science & Mathematics > Physics > Atomic & molecular physics
Electrostatic Accelerators have been at the forefront of modern
technology since the development by Sir John Cockroft and Ernest
Walton in 1932 of the first accelerator, which was the first to
achieve nuclear transmutation and earned them the Nobel Prize in
Physics in 1951. The applications of Cockroft and Walton's
development have been far reaching, even into our kitchens where it
is employed to generate the high voltage needed for the magnetron
in microwave ovens. Other electrostatic accelerator related Nobel
prize winning developments that have had a major socio-economic
impact are; the electron microscope where the beams of electrons
are produced by an electrostatic accelerator, X-rays and computer
tomography (CT) scanners where the X-rays are produced using an
electron accelerator and microelectronic technology where ion
implantation is used to dope the semiconductor chips which form the
basis of our computers, mobile phones and entertainment systems.
Although the Electrostatic Accelerator field is over 90 years old,
and only a handful of accelerators are used for their original
purpose in nuclear physics, the field and the number of
accelerators is growing more rapidly than ever. The objective of
this book is to collect together the basic science and technology
that underlies the Electrostatic Accelerator field so it can serve
as a handbook, reference guide and textbook for accelerator
engineers as well as students and researchers who work with
Electrostatic Accelerators.
Nuclear spins are highly coherent quantum objects that were
featured in early ideas and demonstrations of quantum information
processing. In silicon, the high-fidelity coherent control of a
single phosphorus (31-P) nuclear spin I=1/2 has demonstrated
record-breaking coherence times, entanglement, and weak
measurements. In this thesis, we demonstrate the coherent quantum
control of a single antimony (123-Sb) donor atom, whose higher
nuclear spin I = 7/2 corresponds to eight nuclear spin states.
However, rather than conventional nuclear magnetic resonance (NMR),
we employ nuclear electric resonance (NER) to drive nuclear spin
transitions using localized electric fields produced within a
silicon nanoelectronic device. This method exploits an idea first
proposed in 1961 but never realized experimentally with a single
nucleus, nor in a non-polar crystal such as silicon. We then
present a realistic proposal to construct a chaotic driven top from
the nuclear spin of 123-Sb. Signatures of chaos are expected to
arise for experimentally realizable parameters of the system,
allowing the study of the relation between quantum decoherence and
classical chaos, and the observation of dynamical tunneling. These
results show that high-spin quadrupolar nuclei could be deployed as
chaotic models, strain sensors, hybrid spin-mechanical quantum
systems, and quantum-computing elements using all-electrical
controls.
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.
International experts
Comprehensive articles
New developments"
This book describes the manipulation of molecular properties, such
as orientation, structure, and dynamics, of small molecules and
molecular clusters isolated in cold inert matrices by using
unprecedentedly strong external electrostatic fields. Manipulation
of molecules with controllable external forces is a dream of
chemists. Molecules are inherently quantum-mechanical systems,
control of which potentially can lead to quantum technology, such
as quantum sensing and computing. This book demonstrates a
combination of the ice film nanocapacitor method and the matrix
isolation technique enabled the application of intense external dc
electric fields across the isolated molecules and molecular
clusters. Changes in molecular states induced by fields were
monitored by means of vibrational spectroscopy. Also, the book
presents manipulations of the inversion tunneling dynamics of
ammonia molecule and the dislocation of acidic proton in hydrogen
chloride-water complex. The book shows that the vibrational
spectroscopy with the aid of unprecedentedly strong dc electric
field can provide rich information on the electrostatic behaviors
of molecules and molecular clusters, which underlie the
understanding of intermolecular processes and molecular
manipulation.
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.
International experts
Comprehensive articles
New developments"
B Factories are particle colliders at which specific subatomic
particles - B mesons - are produced abundantly. The purpose is to
study the properties of their decays in great detail in order to
shed light on a mystery of eminently larger scale: why do we live
in a universe composed of anti-matter? This book introduces readers
to the physics laws of the CP asymmetry, touching on experimental
requirements needed to perform such measurements at the subatomic
level, and illustrating the main findings of the contemporary B
Factories.
The dynamics of quantum systems exposed to ultrafast (at the
femtosecond time-scale) and strong laser radiation has a highly
non-linear character, leading to a number of new phenomena, outside
the reach of traditional spectroscopy. The current laser technology
makes feasible the probing and control of quantum-scale systems
with fields that are as strong as the interatomic Coulombic
interactions and time resolution that is equal to (or less than)
typical atomic evolution times. It is indispensable that any
theoretical description of the induced physical processes should
rely on the accurate calculation of the atomic structure and a
realistic model of the laser radiation as pulsed fields. This book
aims to provide an elementary introduction of theoretical and
computational methods and by no means is anywhere near to complete.
The selection of the topics as well as the particular viewpoint is
best suited for early-stage students and researchers; the included
material belongs in the mainstream of theoretical approaches albeit
using simpler language without sacrificing mathematical accuracy.
Therefore, subjects such as the Hilbert vector-state,
density-matrix operators, amplitude equations, Liouville equation,
coherent laser radiation, free-electron laser, Dyson-chronological
operator, subspace projection, perturbation theory, stochastic
density-matrix equations, time-dependent SchrAdinger equation,
partial-wave analysis, spherical-harmonics expansions, basis and
grid wavefunction expansions, ionization, electron kinetic-energy
and angular distributions are presented within the context of
laser-atom quantum dynamics.
This thesis describes the application of the collinear resonance
laser spectroscopy to sensitively measure the electromagnetic
nuclear observables of the neutron-rich indium isotopes 115-131In.
This entailed a systematic study of the efficiency of resonant
ionization schemes to extract the hyperfine structure of the
isotopes, the atomic charge exchange process and benchmarking of
modern atomic calculations with a laser ablation ion source. This
allowed determination of the root-mean-square nuclear charge radii,
nuclear magnetic dipole moments, nuclear electric quadrupole
moments and nuclear spins of the 113-131In isotopes with high
accuracy. With a proton hole in the Z = 50 nuclear shell closure of
tin and several nuclear isomer states, these measurements of the
indium (Z = 49) isotope chain provided an efficient probe of the
evolution of nuclear structure properties towards and at the
doubly-magic nuclear shell closure of 132Sn (N = 82) - revealing
unpredicted changes.
Short, comprehensive overview concentrating on major breakthroughs,
disruptive ideas, and unexpected results Accessible to all
interested in subatomic physics with little prior knowledge
required Contains the latest developments in this exciting field
Nuclear isomers are the long-lived excited states of nuclei.
Therefore, they constitute the meta-stable landscape of nuclei. The
first isomer was probably identified as early as 1921. Since then,
the number of isomers has been growing steadily picking up pace in
recent times. Interest in nuclear isomers has grown in recent years
for many reasons. The experimental capabilities to observe isomers
have been expanding to cover a wider time scale. This has opened up
new windows to observe and decipher the underlying nuclear
structure and interactions. Further, the isomers are beginning to
be seen as potential energy storage devices and nuclear clocks with
a host of applications. Possible discovery of a gamma ray laser has
also ignited many researches in this area. Isomers now cover the
full nuclear landscape with structural peculiarities specific to
each region of the nuclear chart. Exploring the nuclear isomers,
therefore, provides a novel insight into the nuclear structure
properties of that region. There could be many different reasons
for the long lives of excited nuclear states, which lead to the
classification of isomers. Isomers are broadly classified in to
four classes: Spin isomers, shape isomers, fission isomers and
K-isomers. Seniority isomers have also been identified which are
often clubbed with the spin isomers. We discuss this classification
and the underlying causes in detail. Many examples are considered
to highlight the large variety of isomers. The range of half-lives
covered by the isomers varies from billions of years to
nano-seconds and even small. To understand this vast variation is a
fascinating endeavor in itself. The angular momentum couplings,
nuclear shapes, pairing etc. conspire together to give this vast
range of half-lives. We go through these aspects in detail,
highlighting the various selection rules at work. It is interesting
that the nuclear shapes play an important role in many types of
isomers. The spin isomers, which occur in spherical or,
near-spherical nuclei, are generally confined to the magic numbers.
Seniority isomers are largely found in semi-magic nuclei and should
be explored in conjunction with the spin isomers. New developments
in seniority and generalized seniority isomers are discussed in
detail. As the nuclei deform; the nature of isomers changes. We
take a close look into the decay properties of isomers in deformed
nuclei, particularly the K isomers, the shape isomers and the
fission isomers. While doing so, the theoretical and experimental
developments of isomers are also addressed. A number of open
questions are posed for possible new experiments and better
understanding of the isomers.
This book presents the proceedings of The International Workshop on
Frontiers in High Energy Physics (FHEP 2019), held in Hyderabad,
India. It highlights recent, exciting experimental findings from
LHC, KEK, LIGO and several other facilities, and discusses new
ideas for the unified treatment of cosmology and particle physics
and in the light of new observations, which could pave the way for
a better understanding of the universe we live in. As such, the
book provides a platform to foster collaboration in order to
provide insights into this important field of physics.
Written by a former International Atomic Energy Agency (IAEA)
nuclear inspector and nuclear security expert, this book provides a
comprehensive and authentic overview of current global nuclear
developments. The author provides detailed insights into current
and past nuclear crises and reveals the technical capabilities,
political strategies and motives of nuclear weapon owners. By
analyzing the nuclear programs and strategies of various countries,
including the USA, Russia, China, Great Britain and France, this
book highlights the existing global nuclear threat and the risks it
entails for humanity. It also describes the current blockades and
suggests possible ways out. Given its scope, the book will appeal
to scholars and policymakers interested in gaining new insights
into sensitive or complex nuclear programs in various countries.
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.
- International experts
- Comprehensive articles
- New developments
Caustics are natural phenomena, forming light patterns in rainbows
or through drinking glasses, and creating light networks at the
bottom of swimming pools. Only in recent years have scientists
started to artificially create simple caustics with laser light.
However, these realizations have already contributed to progress in
advanced imaging, lithography, and micro-manipulation. In this
book, Alessandro Zannotti pioneers caustics in many ways,
establishing the field of artificial caustic optics. He employs
caustic design to customize high-intensity laser light. This is of
great relevance for laser-based machining, sensing, microscopy, and
secure communication. The author also solves a long standing
problem concerning the origin of rogue waves which appear naturally
in the sea and can have disastrous consequences. By means of a
far-reaching optical analogy, he identifies scattering of caustics
in random media as the origin of rogue waves, and shows how
nonlinear light-matter interaction increases their probability.
This book introduces readers to basic approaches in and principles
of marine nuclear power design, including overall reactor design,
in-core design, coolant systems and devices, I&C system design,
safety system design, and dynamic analysis assessment. It
comprehensively reviews both the fundamentals of and latest trends
in nuclear-powered devices, covering their entire lifespan, from
design and testing to operation and decommissioning. Further, it
explores in detail various real-world conditions in the marine
context - such as insufficient space for equipment deployment and
frequently changing operating conditions as well as swinging and
tilting. Offering extensive information on the design and operation
of marine nuclear power systems, the book is a valuable resource
for researchers and professionals in the area of marine science and
nuclear engineering, and graduate students intending to embark on a
career in the field.
Gas phase molecular spectroscopy is a powerful tool for obtaining
information on the geometry and internal structure of isolated
molecules as well as on the interactions that they undergo. It
enables the study of fundamental parameters and processes and is
also used for the sounding of gas media through optical techniques.
It has been facing always renewed challenges, due to the
considerable improvement of experimental techniques and the
increasing demand for accuracy and scope of remote sensing
applications.
In practice, the radiating molecule is usually not isolated but
diluted in a mixture at significant total pressure. The collisions
among the molecules composing the gas can have a large influence on
the spectral shape, affecting all wavelength regions through
various mechanisms. These must be taken into account for the
correct analysis and prediction of the resulting spectra.
This book reviews our current experimental and theoretical
knowledge and the practical consequences of collisional effects on
molecular spectral shapes in neutral gases. General expressions are
first given. They are formal of difficult use for practical
calculations often but enable discussion of the approximations
leading to simplified situations. The first case examined is that
of isolated transitions, with the usual pressure broadening and
shifting but also refined effects due to speed dependence and
collision-induced velocity changes. Collisional line-mixing, which
invalidates the notion of isolated transitions and has spectral
consequences when lines are closely spaced, is then discussed
within the impact approximation. Regions where the contributions of
many distant lines overlap, such as troughsbetween transitions and
band wings, are considered next. For a description of these far
wings the finite duration of collisions and concomitant breakdown
of the impact approximation must be taken into account. Finally,
for long paths or elevated pressures, the dipole or polarizability
induced by intermolecular interactions can make significant
contributions. Specific models for the description of these
collision induced absorption and light scattering processes are
presented.
The above mentioned topics are reviewed and discussed from a
threefold point of view: the various models, the available data,
and the consequences for applications including heat transfer,
remote sensing and optical sounding. The extensive bibliography and
discussion of some remaining problems complete the text.
- State of the art on the subject
- A bibliography of nearly 1000 references
- Tools for practical calculations
- Consequences for other scientific fields
- Numerous illustrative examples
- Fulfilling a need since there is no equivalent monograph on the
subject
Volume 54 of the Advances Series contains ten contributions,
covering a diversity of subject areas in atomic, molecular and
optical physics. The article by Regal and Jin reviews the
properties of a Fermi degenerate gas of cold potassium atoms in the
crossover regime between the Bose-Einstein condensation of
molecules and the condensation of fermionic atom pairs. The
transition between the two regions can be probed by varying an
external magnetic field. Sherson, Julsgaard and Polzik explore the
manner in which light and atoms can be entangled, with applications
to quantum information processing and communication. They report on
the result of recent experiments involving the entanglement of
distant objects and quantum memory of light. Recent developments in
cold Rydberg atom physics are reviewed in the article by Choi,
Kaufmann, Cubel-Liebisch, Reinhard, and Raithel. Fascinating
experiments are described in which cold, highly excited atoms
(???Rydberg??? atoms) and cold plasmas are generated. Evidence for
a collective excitation of Rydberg matter is also presented.
Griffiin and Pindzola offer an account of non-perturbative quantal
methods for electron-atom scattering processes. Included in the
discussion are the R-matrix with pseudo-states method and the
time-dependent close-coupling method. An extensive review of the
R-matrix theory of atomic, molecular, and optical processes is
given by Burke, Noble, and Burke. They present a systematic
development of the R-matrix method and its applications to various
processes such as electron-atom scattering, atomic photoionization,
electron-molecule scattering, positron-atom scattering, and
atomic/molecular multiphoton processes. Electron impactexcitation
of rare-gas atoms from both their ground and metastable states is
discussed in the article by Boffard, Jung, Anderson, and Lin.
Excitation cross sections measured by the optical method are
reviewed with emphasis on the physical interpretation in terms of
electronic structure of the target atoms. Ozier and Moazzen-Ahmadi
explore internal rotation of symmetric top molecules. Developments
of new experimental methods based on high-resolution torsional,
vibrational, and molecular beam spectroscopy allow accurate
determination of internal barriers for these symmetric molecules.
The subject of attosecond and angstrom science is reviewed by
Niikura and Corkum. The underlying physical mechanisms allowing one
to generate attosecond radiation pulses are described and the
technology needed for the preparation of such pulses is discussed.
LeGou??t, Bretenaker, and Lorger?? describe how rare earth ions
embedded in crystals can be used for processing optically carried
broadband radio-frequency signals. Methods for reaching tens of
gigahertz instantaneous bandwidth with submegahertz resolution
using such devices are analyzed in detail and demonstrated
experimentally. Finally, in the article by Illing, Gauthier, and
Roy, it is shown that small perturbations applied to optical
systems can be used to suppress or control optical chaos,
spatio-temporal dynamics, and patterns. Applications of these
techniques to communications, laser stabilization, and improving
the sensitivity of low-light optical switches are explored.
?? International experts
?? Comprehensive articles
?? New developments
How the scientific community overlooked, ignored, and denied the
catastrophic fallout of decades of nuclear testing in the American
West In December of 1950, President Harry Truman gave authorization
for the Atomic Energy Commission to conduct weapons tests and
experiments on a section of a Nevada gunnery range. Over the next
eleven years, more than a hundred detonations were conducted at the
Nevada Test Site, and radioactive debris dispersed across the
communities just downwind and through much of the country. In this
important work, James C. Rice tells the hidden story of nuclear
weapons testing and the negligence of the US government in
protecting public health. Downwind of the Atomic State focuses on
the key decisions and events shaping the Commission's mismanagement
of radiological contamination in the region, specifically on how
the risks of fallout were defined and redefined, or, importantly,
not defined at all, owing to organizational mistakes and the
impetus to keep atomic testing going at all costs. Rice shows that
although Atomic Energy Commission officials understood open-air
detonations injected radioactive debris into the atmosphere, they
did not understand, or seem to care, that the radioactivity would
irrevocably contaminate these communities. The history of the
atomic Southwest should be a wake-up call to everyone living in a
world replete with large, complex organizations managing risky
technological systems. The legacy of open-air detonations in Nevada
pushes us to ask about the kinds of risks we are unwittingly living
under today. What risks are we being exposed to by large
organizations under the guise of security and science?
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