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Since the turn of the 21st century, the field of electron molecule
collisions has undergone a renaissance. The importance of such
collisions in applications from radiation chemistry to
astrochemistry has flowered, and their role in industrial processes
such as plasma technology and lighting are vital to the advancement
of next generation devices. Furthermore, the development of the
scanning tunneling microscope highlights the role of such
collisions in the condensed phase, in surface processing, and in
the development of nanotechnology. Low-Energy Electron Scattering
from Molecules, Biomolecules and Surfaces highlights recent
progress in the theory and experiment of electron-molecule
collisions, providing a detailed review of the current state of
knowledge of electron molecule scattering-theoretical and
experimental-for the general physicist and chemist interested in
solving practical problems. In few other branches of science is the
collaboration between theorists and experimentalists so topical.
Covering advancements in practical problems, such as those met in
plasma physics, microelectronics, nanolithography, DNA research,
atmospheric chemistry, and astrochemistry, this book describes the
formal general scattering theory and description of the
experimental setup at a level the interested non-expert can
appreciate.
Since the turn of the 21st century, the field of electron molecule
collisions has undergone a renaissance. The importance of such
collisions in applications from radiation chemistry to
astrochemistry has flowered, and their role in industrial processes
such as plasma technology and lighting are vital to the advancement
of next generation devices. Furthermore, the development of the
scanning tunneling microscope highlights the role of such
collisions in the condensed phase, in surface processing, and in
the development of nanotechnology. Low-Energy Electron Scattering
from Molecules, Biomolecules and Surfaces highlights recent
progress in the theory and experiment of electron-molecule
collisions, providing a detailed review of the current state of
knowledge of electron molecule scattering-theoretical and
experimental-for the general physicist and chemist interested in
solving practical problems. In few other branches of science is the
collaboration between theorists and experimentalists so topical.
Covering advancements in practical problems, such as those met in
plasma physics, microelectronics, nanolithography, DNA research,
atmospheric chemistry, and astrochemistry, this book describes the
formal general scattering theory and description of the
experimental setup at a level the interested non-expert can
appreciate.
I feel very honored that I have been asked to write a Foreword to
this book. The subject of the book - "Coupled cluster theory" - has
been around for about half a century. The basic theory and explicit
equations for closed-shell ground states were formulated before
1970. At the beginning of the seventies the rst ab initio calcu-
tion were carried out. At that time speed and memory of computers
were very limited compared to today's standards. Moreover, the size
of one-electron bases employed was small, so that it was only
possible to achieve an orientation in methodical aspects rather
than to generate new signi cant results. Extensive use of the
coupled-cluster method started at the beginning of the eighties.
With the help of more powerful computers the results of
coupled-cluster approaches started to yield more and more
interesting results of relevance to the interpretation of
experimental data. New ideas in methodology kept appearing and
computer codes became more and more ef cient. This exciting
situation continues to this very day. Remarkably enough, even the -
quired equations can now be generated by a computer with the help
of symbolic languages. The size of this monograph and the rich
variety of articles it contains attests to the usefulness and
viability of the couple-cluster formalism for the h- dling of
many-electron correlation effects. This represents a vivid
testimony of a tremendous work that has been accomplished in
coupled-cluster methodology and its exploitation.
Until recently quantum chemical ab initio calculations were re
stricted to atoms and very small molecules. As late as in 1960
Allen l and Karo stated : "Almost all of our ab initio experience
derives from diatomic LCAO calculations *** N and we have found in
the litera ture "approximately eighty calculations, three-fourths
of which are for diatomic molecules *** There are approximately
twenty ab initio calculations for molecules with more than two
atoms, but there is a decided dividing line between the existing
diatomic and polyatomic wave functions. Confidence in the
satisfactory evaluation of the many -center two-electron integrals
is very much less than for the diatom ic case". Among the noted
twenty calculations, SiH was the largest 4 molecule treated. In
most cases a minimal basis set was used and the many-center
two-electron integrals were calculated in an approximate way. Under
these circumstances the ab initio calculations could hard ly
provide useful chemical information. It is therefore no wonder that
the dominating role in the field of chemical applications was
played by semiempirical and empirical methods. The situation
changed essentially in the next decade. The problem of many-center
integrals was solved, efficient and sophisticated computer programs
were devel oped, basis sets suitable for a given type of problem
were suggested, and, meanwhile, a considerable amount of results
has been accumulated which serve as a valuable comparative
material. The progress was of course inseparable from the
development and availability of computers.
I feel very honored that I have been asked to write a Foreword to
this book. The subject of the book - "Coupled cluster theory" - has
been around for about half a century. The basic theory and explicit
equations for closed-shell ground states were formulated before
1970. At the beginning of the seventies the rst ab initio calcu-
tion were carried out. At that time speed and memory of computers
were very limited compared to today's standards. Moreover, the size
of one-electron bases employed was small, so that it was only
possible to achieve an orientation in methodical aspects rather
than to generate new signi cant results. Extensive use of the
coupled-cluster method started at the beginning of the eighties.
With the help of more powerful computers the results of
coupled-cluster approaches started to yield more and more
interesting results of relevance to the interpretation of
experimental data. New ideas in methodology kept appearing and
computer codes became more and more ef cient. This exciting
situation continues to this very day. Remarkably enough, even the -
quired equations can now be generated by a computer with the help
of symbolic languages. The size of this monograph and the rich
variety of articles it contains attests to the usefulness and
viability of the couple-cluster formalism for the h- dling of
many-electron correlation effects. This represents a vivid
testimony of a tremendous work that has been accomplished in
coupled-cluster methodology and its exploitation.
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