Download or read book Calculations of High Intensity Multiphoton Ionization and Photoemission from Atoms written by K. C. Kulander and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method which involves the direct solution of the time dependent Schrodinger equations has been used in studies of the dynamics of excitation of and emission from atoms in intense, pulsed laser fields. A surprising array of effects have been observed during high-intensity, short-pulse laser excitation of atoms and molecules. To model the results of these measurements, we have developed methods to solve the time-dependent Schrodinger equation for an atom in a time varying, classical electromagnetic field. Studies on may atomic and molecular systems have been performed over a range of intensities from the regime within which perturbative techniques are valid up to field strengths well above an atomic unit (I> (3.51 x 10 to the 16th W)/sq. cm.). These calculations have provided predictions for ionization rates, 1 photoelectron energy and angular distributions and photoemission rates. The effects of ac Stark shifted and intensity broadened intermediate states on the emission processes have been investigated.
Download or read book Multiphoton lonization of Atoms written by S.L. Chin and published by Elsevier. This book was released on 2012-12-02 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiphoton lonization of Atoms provides a pedagogical review of the whole subfield of multiphoton ionization of atoms. This book discusses the “normal multiphoton ionization of atoms; calculation of resonant multiphoton processes; and angular distribution of photoelectrons and light polarization effects in multiphoton ionization of atoms. The multiphoton ionization involving continuum-continuum transitions; creation of doubly charged strontium ions; and many-electron processes in nonlinear ionization of atoms are also elaborated. Other topics include the non-resonant multiphoton ionization of atoms; above-threshold ionization theory; autoionizing states in multiphoton transitions; and specific features of the spectra of alkaline-earth atoms. This publication is beneficial to physics students and researchers conducting work on the multiple ionization of atoms.
Download or read book Multiphoton Processes written by P. Lambropoulos and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters of this volume represent the invited papers delivered at the 3rd International Conference on Multiphoton Processes (ICOMP III) held in Iraklion, Crete, Greece, September 5-11, 1984. The invited papers at a conference like ICOMP cannot possibly cover the whole field which has grown to immense proportions in recent years, overlapping with such diverse areas as atomic and molecular spectroscopy, plasma physics, nonlinear optics, quantum optics, etc. We believe these contributions represent that part of the research activity which has been attracting the most interest in the past year or so, as well as reviews of some of the more established topics. Even within this scope, and given the confines imposed by the fi nite duration of a conference, important and timely topics are inevitably left out. But then, there will be ICOMP IV. The collection of articles in this volume, combined with extensive ref erences to related work given by the authors, should provide an introduc tion to the major problems of the field and its state of the art. The chapters have been arranged according to thematic proximity, beginning with atoms, and continuing on with molecules and surfaces. This classi fication, however, would not cover all the subject matter even within the limited scope of the conference and of this volume.
Download or read book Super Intense Laser Atom Physics written by A. L'Huillier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid development of powerful pulsed lasers is at the origin of a conside rable interest in studying the response of an atom, a molecule (or a solid) to a strong electromagnetic field. It is now possible to produce at the laboratory scale, ultra-short 13 pulses with a duration of 100 femtoseconds (10- second) and a power of the order 12 of 1 terawatt (10 Watt). Under these conditions, very high peak intensities may be obtained and electric fields exceeding typical electron binding fields in atoms are generated. The interaction of an atom or a molecule with such electromagnetic fields has a highly non-linear character which leads to unexpected phenomena. Amongst them, - above-threshold ionization (ATI) i.e. the absorption of additional photons in excess of the minimal number necessary to overcome the ionization potential and its molecular counterpart, above-threshold dissociation (ATD); - generation of very high harmonics of the driving field; - stabilization of one-electron systems in strong fields. These processes were the main topics of two international meetings which were held in 1989 and 1991 in the United States under the common name SILAP (Super-Intense Laser-Atom Physics).
Download or read book Laser Interactions with Atoms Solids and Plasmas written by Richard M. More and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this NATO Advanced Study Institute was to bring together scientists and students working in the field of laser matter interactions in order to review and stimulate developmentoffundamental science with ultra-short pulse lasers. New techniques of pulse compression and colliding-pulse mode-locking have made possible the construction of lasers with pulse lengths in the femtosecond range. Such lasers are now in operation at several research laboratories in Europe and the United States. These laser facilities present a new and exciting research direction with both pure and applied science components. In this ASI the emphasis is on fundamental processes occurring in the interaction of short laser pulses with atoms, molecules, solids, and plasmas. In the case of laser-atom (molecule) interactions, high power lasers provide the first access to extreme high-intensity conditions above 10'8 Watts/em', a new frontier for nonlinear interaction of photons with atoms and molecules. New phenomena observed include multiphoton ionization processes, atomic collisions in the presence of a strong laser field, Coulomb explosion following rapid ionization of a molecule and the production of high harmonics of the laser source. Another important topic reviewed in this ASI is the lasercooling ofatoms.
Download or read book Advances in Multi photon Processes and Spectroscopy written by S. H. Lin and published by World Scientific. This book was released on 1987 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the rapid growth in both experimental and theoretical studies of multiphoton processes and multiphoton spectroscopy of atoms, ions, and molecules in chemistry, physics, biology and material sciences, this series contains review papers exploring the growth. They are readable not only by active researchers in these areas but also by those who are not experts in the field but intend to enter the field.
Download or read book Photoelectron Distributions from Resonant Multiphoton Ionization of Atoms and Molecules written by James Stevenson Keller and published by . This book was released on 1989 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiphoton Processes Proceedings Of The Sixth International Conference written by See Leang Chin and published by World Scientific. This book was released on 1994-08-31 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of proceedings of the latest International Conference on Multiphoton Processes provides a timely report on the latest work on the interaction of lasers with atoms and molecules, including short laser pulses, intense fields, stabilization, high harmonic generation, coherent control of reactions and reports from leading laboratories.
Download or read book Advances in Atomic Molecular and Optical Physics written by and published by Academic Press. This book was released on 2012-10-18 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Atomic, Molecular, and Optical Physics publishes reviews of recent developments in a field which is in a state of rapid growth, as new experimental and theoretical techniques are used on many old and new problems. Topics covered include related applied areas, such as atmospheric science, astrophysics, surface physics and laser physics. Articles are written by distinguished experts, and contain both relevant review material and detailed descriptions of important recent developments. International experts Comprehensive articles New developments
Download or read book OSA Proceedings on Short Wavelength Coherent Radiation written by Philip H. Bucksbaum and published by . This book was released on 1991 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Spectroscopy and Dynamics of Multiphoton Processes in Atoms and Molecules written by P. M. Dehmer and published by . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes research on resonantly enhanced multiphoton absorption dissociation, and ionization processes in atoms and molecules. Multiphoton processes are studied using from one to three independently tunable visible and/or UV laser beams in order to establish both the underlying physics and the high degree of selectivity of multiphoton processes. Measurements are made to probe both the formation of excited molecular states and the subsequent behavior of excited states either in the presence or in the abscence of further intense laser radiation. Detection methods include laser-induced fluorescence, ion mass analysis, and electron energy analysis. During the current reporting period, we have studied resonant multiphoton ionization processes for the molecules N2, CO, O2, NO, NeXe, ArXe, KrXe, and Xe2 and for the atoms C, I, and S using both mass spectrometry and photoelectron spectroscopy to analyze the products of the ionizations. In addition, we are developing three new instruments that will provide significantly enhanced resolution, collection efficiency, and versatility in both the ion mass and the electron kinetic energy detection channels. Keywords include: double resonance spectroscopy, electron spectroscopy, molecular beams, rydberg states; photoelectron angular, distributions. (Author).
Download or read book Advances in Atomic Molecular and Optical Physics written by Paul R. Berman and published by Academic Press. This book was released on 2011-10-03 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Atomic, Molecular, and Optical Physics publishes reviews of recent developments in a field which is in a state of rapid growth, as new experimental and theoretical techniques are used on many old and new problems. Topics covered include related applied areas, such as atmospheric science, astrophysics, surface physics and laser physics. Articles are written by distinguished experts, and contain both relevant review material and detailed descriptions of important recent developments. International experts Comprehensive articles New developments
Download or read book Advances In Multi photon Processes And Spectroscopy Vol 4 written by Sheng-hsien Lin and published by World Scientific. This book was released on 1988-05-01 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Two-Color Double Resonance Spectroscopy For the Study of High Excited States of Molecules (M Ito & M Fujii)Resonantly Enhanced Multiphoton Ionization — Photoelectron Spectroscopy as a Probe of Molecular Photophysics and Photochemistry (S Pratt, P Dehmer & J Dehmer)Progress in Resonance Enhanced Multiphoton Ionization Spectroscopy of Transient Free Radicals (J Hudgens)Time-Resolved Resonance Raman Spectroscopy: Intense Electromagnetic Field Effects, and Photoelectrochemical Reactions on Semiconductor Crystallite Surfaces (L Brus) Readership: Atomic physicists, chemists and materials scientists.
Download or read book Theory of Nonlinear Propagation of High Harmonics Generated in a Gaseous Medium written by Cheng Jin and published by Springer Science & Business Media. This book was released on 2013-09-11 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theory of Nonlinear Propagation of High Harmonics Generated in a Gaseous Medium establishes the theoretical tools to study High-Order Harmonic Generation (HHG) by intense ultrafast infrared lasers in atoms and molecules. The macroscopic propagation of both laser and high-harmonic fields is taken into account by solving Maxwell's wave equations, while the single-atom or single-molecule response is treated with a quantitative rescattering theory by solving the time-dependent Schrödinger equation. This book demonstrates for the first time that observed experimental HHG spectra of atoms and molecules can be accurately reproduced theoretically when precise experimental conditions are known. The macroscopic HHG can be expressed as a product of a macroscopic wave packet and a photorecombination cross section, where the former depends on laser and experimental conditions while the latter is the property of target atoms or molecules. The factorization makes it possible to retrieve microscopically atomic or molecular structure information from the measured macroscopic HHG spectra. This book also investigates other important issues about HHG, such as contributions from multiple molecular orbitals, the minimum in the HHG spectrum, the spatial mode of laser beams, and the generation of an isolated attosecond pulse. Additionally, this book presents the photoelectron angular distribution of aligned molecules ionized by the HHG light.
Download or read book High order Multiphoton Ionization of the Noble Gases written by Michael Dale Perry and published by . This book was released on 1988 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances In Multi photon Processes And Spectroscopy Vol 21 written by Yuichi Fujimura and published by World Scientific. This book was released on 2013-12-12 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents recent progress and perspectives in multi-photon processes and spectroscopy of atoms, ions, molecules and solids. The subjects in the series cover the experimental and theoretical investigations in the interdisciplinary research fields of natural science including chemistry, physics, bioscience and material science.This volume is the latest volume in a series that is a pioneer in compiling review articles of nonlinear interactions of photons and matter. It has made an essential contribution to the development and promotion of the related research fields. In view of the rapid growth in multi-photon processes and multi-photon spectroscopy, care has been taken to ensure that the review articles contained in the series are readable not only by active researchers but also those who are not yet experts but intend to enter the field.
Download or read book Molecular Multiphoton Ionization written by G. n GIBSON and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resonant multiphoton ionization (MPI) of nitrogen has been studied using photoelectron spectroscopy in the short-pulse regime. Both Rydberg and valence states are identified as intermediate resonances in the photoionization process, although the valence states are seen only at low intensity. It is shown that the vibrational structure of the Rydberg states acting as intermediate resonances cancels out in the photoelectron spectrum, leading to sharp atomic-like spectra, even at high intensities. Finally, the ionization of the 3 sigma sub g 1 pi sub u and 2 sigma sub u electrons are clearly distinguished.
