Download or read book Electron Impact Total Ionization Cross Sections written by and published by DIANE Publishing. This book was released on with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Impact Ionization written by T.D. Märk and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is perhaps surprising that a process which was one of the first to be studied on an atomic scale, and a process which first received attention over seven decades ago, continues to be the object of diverse and intense research efforts. Such is the case with the (seemingly) conceptually simple and familiar mechanism of electron impact ionization of atoms, molecules, and ions. Not only has the multi-body nature of the collision given ground to theoretical effort only grudgingly, but also the variety and subtlety of processes contributing to ionization have helped insure that progress has come only with commensurate work: no pain - no gain. Modern experimental methods have made it possible to effectively measure and explore threshold laws, differential cross sections, partial cross sections, inner-shell ionization, and the ionization of unstable species such as radicals and ions. In most instances the availability of experimental data has provided impetus and guidance for further theoretical progress.
Download or read book Cosmic Rays and Particle Physics written by Thomas K. Gaisser and published by Cambridge University Press. This book was released on 1990 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over recent years there has been marked growth in interest in the study of techniques of cosmic ray physics by astrophysicists and particle physicists. Cosmic radiation is important for the astrophysicist because in the farther reaches of the universe. For particle physicists, it provides the opportunity to study neutrinos and very high energy particles of galactic origin. More importantly, cosmic rays constitue the background, and in some cases possibly the signal, for the more exotic unconfirmed hypothesized particles such as monopoles and sparticles. Concentrating on the highest energy cosmic rays, this book describes where they originate, acquire energy, and interact, in accreting neutron stars, supernova remnants, in large-scale shock waves. It also describes their interactions in the atmosphere and in the earth, how they are studied in surface and very large underground detectors, and what they tell us.
Download or read book Electron Impact Total Ionization Cross Sections of Molecular Ions written by Leon Panetta and published by DIANE Publishing. This book was released on 2012-05 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron impact Ionization Cross Section Database written by Yong-Ki Kim and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a database primarily of total ionization cross sections of molecules by electron impact. The database also includes cross sections for a small number of atoms and energy distributions of ejected electrons for H, He, and H2. The cross sections were calculated using the Binary-Encounter-Bethe (BEB) model, which combines the Mott cross section with the high-incident energy behavior of the Bethe cross section. Selected experimental data are included.
Download or read book Total Ionization Cross Sections of Molecules by Electron Impact written by Yong-Ki Kim and published by . This book was released on 2004 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical basis for the binary-encounter-Bethe (BEB) model is outlined, and the model is compared to available experiments and other theories for samples of stable molecules, radicals, and positive ions. Possible directions for improving the BEB model also are presented. The BEB model does not contain empirical parameters, offers a simple equation and recipe for the ionization cross-section of individual molecular orbitals, and provides reliable cross-sections at low as well as high incident electron energies. The BEB model has been verified to produce reliable cross-sections for dozens of stable, neutral, large, and small molecules (e.g., H2, SF6), radicals, and singly-charged positive ions. Section 2 discusses the theoretical basis for the BEB model. Section 3 compares BEB cross-sections with available experimental data for N2, CF4, SF6, CH3, N2+ and SF5. It is clear that the BEB model can produce reliable ionization cross-sections for small as well as large, stable molecules. It also can produce reliable cross-sections for hydrocarbon radicals and singly-charged positive ions. However, the BEB cross sections do not agree well with the experimental data on radicals containing fluorine, CFx, SFx, and NFx, although the BEB cross-sections for the stable molecules CF4 and SF6 agree well with experiments. Section 4 examines unsolved issues and future prospects.
Download or read book Updated Excitation and Ionization Cross Sections for Electron Impact on Atomic Oxygen written by Russ R. Laher and published by . This book was released on 1988 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monte Carlo Transport of Electrons and Photons written by T.M. Jenkins and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: For ten days at the end of September, 1987, a group of about 75 scientists from 21 different countries gathered in a restored monastery on a 750 meter high piece of rock jutting out of the Mediterranean Sea to discuss the simulation of the transport of electrons and photons using Monte Carlo techniques. When we first had the idea for this meeting, Ralph Nelson, who had organized a previous course at the "Ettore Majorana" Centre for Scientific Culture, suggested that Erice would be the ideal place for such a meeting. Nahum, Nelson and Rogers became Co-Directors of the Course, with the help of Alessandro Rindi, the Director of the School of Radiation Damage and Protection, and Professor Antonino Zichichi, Director of the "Ettore Majorana" Centre. The course was an outstanding success, both scientifically and socially, and those at the meeting will carry the marks of having attended, both intellectually and on a personal level where many friendships were made. The scientific content of the course was at a very high caliber, both because of the hard work done by all the lecturers in preparing their lectures (e. g. , complete copies of each lecture were available at the beginning of the course) and because of the high quality of the "students", many of whom were accomplished experts in the field. The outstanding facilities of the Centre contributed greatly to the success. This volume contains the formal record of the course lectures.
Download or read book Total Electron Impact Ionization Cross Sections of Cfx and Nfx X 1 3 written by Winifred M. Huo and published by BiblioGov. This book was released on 2013-08 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discrepancy between experimental and theoretical total electron-impact ionization cross sections for a group of fluorides, CFx, and NFx, (x = 1 - 3), is attributed to the inadequacies in previous theoretical models. Cross-sections calculated using a recently developed siBED (simulation Binary-Encounter-Dipole) model that takes into account the shielding of the long-range dipole potential between the scattering electron and target are in agreement with experimentation. The present study also carefully reanalyzed the previously reported experimental data to account for the possibility of incomplete collection of fragment ions and the presence of ion-pair formation channels. For NF3, our experimental and theoretical cross-sections compare well with the total ionization cross-sections recently reported by Haaland et al. in the region below dication formation.
Download or read book The Theory of Atomic Structure and Spectra written by Robert D. Cowan and published by Univ of California Press. This book was released on 2023-11-15 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both the interpretation of atomic spectra and the application of atomic spectroscopy to current problems in astrophysics, laser physics, and thermonuclear plasmas require a thorough knowledge of the Slater-Condon theory of atomic structure and spectra. This book gathers together aspects of the theory that are widely scattered in the literature and augments them to produce a coherent set of closed-form equations suitable both for computer calculations on cases of arbitrary complexity and for hand calculations for very simple cases.
Download or read book Photoabsorption Photoionization and Photoelectron Spectroscopy written by Joseph Berkowitz and published by Academic Press. This book was released on 2012-12-02 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoabsorption, Photoionization, and Photoelectron Spectroscopy explores photoabsorption processes involving individual, isolated molecules in the wavelength or photon energy range from the ionization thresholds of molecules (usually in the vacuum ultraviolet region) through the soft and hard X-ray region and beyond the ""K edge."" The interaction between electromagnetic radiation and isolated molecules based on photoabsorption, photoionization, and photoelectron spectroscopy studies is described, along with the techniques for measurement of total and partial cross sections. This book is comprised of eight chapters and examines the decomposition of molecules and molecular ions as well as mildly excited (valence shell excitation) and highly excited (inner shell excitation) molecules. After providing a general theoretical background, it discusses certain classes of atoms and molecules and considers electromagnetic interactions with gases. The following chapters focus on photoabsorption below the first ionization limit; quasi-discrete states above the first ionization potential; and the ionization continuum. Total photoabsorption and photoionization cross sections for selected molecules are also considered, and the angular distribution of photoelectrons is analyzed. The various measurement techniques are described in the last chapter. This monograph will be of interest to radiation chemists, radiation physicists, photochemists, mass spectrometrists, and perhaps radiation biologists.
Download or read book Total and Partial Ionization Cross Sections of Atoms and Ions by Electron Impact written by Hiroyuki Tawara and published by . This book was released on 1987* with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron impact Ionization Cross Sections of Ti Kr Sn Ta U Atoms and Their Ions in the Electron Energy Range from the Threshold Up to 200 KeV written by and published by . This book was released on 2002 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calculation of Electron Impact Total Ionization and Non breakup Cross Sections from the 3S and 3P States of Sodium written by Igor Bray and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic Molecular Ionization by Electron Scattering written by K. N. Joshipura and published by Cambridge University Press. This book was released on 2019-01-24 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers quantum scattering theories, experimental and theoretical calculations and applications in a comprehensive manner.
Download or read book Estimation of Electron Impact Excitation Cross Sections of Molecular Hydrogen written by George M. Prok and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Impact Cross Sections written by Foram M. Joshi and published by LAP Lambert Academic Publishing. This book was released on 2013-01 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron scattering, a subset of atomic molecular physics, plays a key role in many areas of science and technology. It can be used as probes in a wide range of natural processes. This book reports electron impact collision calculations on atomic and molecular targets relevant to plasma and astrophysical systems. It covers theoretical research in these areas on the electron collision and ionization of various atomic and molecular targets in the lower and intermediate energies. We report a simple and effective method developed by our group, which provides an estimate for family of cross sections: total elastic cross sections, total inelastic cross sections, total cross section, rotational cross sections and grand total cross sections for electron scattering from atoms and molecules. The results of such calculations are compared with experiments and with other calculations. Apart from these calculations, the present book also investigates theoretical work on a molecule BF at low energies using R-matrix formulation in the Quantemol-N software. These calculations can be useful to both the experimentalists as well as theoretians in their research work.
