Download or read book Dissociative Recombination of Molecular Ions with Electrons written by Steven L. Guberman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissociative Recombination of Molecular Ions with Electrons is a comprehensive collection of refereed papers describing the latest developments in dissociative recombination research. The papers are written by the leading researchers in the field. The topics covered include the use of microwave afterglows, merged beams and storage rings to measure rate coefficients and to identify the products and their yields. The molecules studied range in size from the smallest, H2+, to bovine insulin ions. The theoretical papers cover the important role of Rydberg states and the use of wave packets and quantum defect theory to deduce cross sections, rate constants and quantum yields. Several theoretical and experimental papers address the controversial topic of H3+ dissociative recombination and its importance in the interstellar medium. Dissociative recombination studies of other molecular ions in the interstellar medium and in cometary and planetary atmospheres are covered. Ionization is an important competitive process to dissociative recombination and its competition with predissociation and its role in the reverse process of the association of neutral species is presented. Dissociative attachment, in which an electron attaches to a neutral molecule, has many similarities to dissociative recombination. The topics covered include the accurate calculation of electron affinities, attachment to molecules, clusters, and to species absorbed on solid surfaces and electron scattering by a molecular anion.
Download or read book Dissociative Recombination of Molecular Ions written by Mats Larsson and published by Cambridge University Press. This book was released on 2012-09-13 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissociative recombination (DR) of molecular ions with electrons is a complex, poorly understood molecular process. Its critical role as a neutralising agent in the Earth's upper atmosphere is now well established and its occurrence in many natural and laboratory-produced plasma has been a strong motivation for studying the event. In this book theoretical concepts, experimental methodology and applications are united, revealing the governing principles behind the gas-phase reaction. The book takes the reader through the intellectual challenges posed, describing in detail dissociation mechanisms, dynamics, diatomic and polyatomic ions and related processes, including dissociative excitation, ion pair formation and photodissociation. With the final chapter dedicated to applications in astrophysics, atmospheric science, plasma physics and fusion research, this is a focused, definitive guide to a fundamental molecular process. The book will appeal to academics within physics, physical chemistry and related sciences.
Download or read book Dissociative Recombination written by Bertrand R. Rowe and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a NATO ARW held in Saint Jacut de la Mer, Brittany, France, May 3-8, 1992
Download or read book Dissociative Recombination Theory Experiment And Applications Iii written by Daniel Zajfman and published by World Scientific. This book was released on 1996-04-25 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the latest developments in the study of the dissociative recombination of electrons and molecular ions are discussed. This process is of great importance in controlling the physical and chemical states of ionized gases. It has direct application to astrophysics, aeronomy, thermonuclear fusion research, plasma processing and combustion science.
Download or read book Dissociative Recombination Theory Experiments And Applications Iv written by Mats Larsson and published by World Scientific. This book was released on 2000-01-21 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissociative recombination is a complex molecular process that occurs in any plasma cold enough to contain molecular constituents. It is the dominant recombination process in planetary ionospheres and interstellar clouds. In this book, recent developments in the fields of molecular ion physics, atomic and molecular theory, astrochemistry, aeronomy and plasma physics are discussed.
Download or read book The Dissociative Recombination of Molecular Ions written by J. B. Mitchell and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recombination of Molecular Positive Ions with Electrons written by M. A. Biondi and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of studies of the recombination of electrons with molecular positive ions are presented. Theoretical arguments indicate that the dissociative process -- in which a molecular ion captures an electron without change of energy, forming an unstable excited molecule which then dissociates -- provides a highly efficient recombination mechanism. The nature of the process responsible for the large recombination rates observed in Laboratory afterglow studies is investigated using combined microwave, optical spectrometric and interferometric, and mass spectrographic techniques. Dissociative recombination is shown to be the process operative in the laboratory studies, since it is found that (a) molecular positive ions must be present to observe a large recombination rate, (b) when diatomic ions are present, excited atoms are formed in the recombination process, and (c) these excited atoms have kinetic energy of dissociation substantially in excess of thermal energy. (Author).
Download or read book The Dissociative Recombination of Molecular Ions written by J. Brian A. Mitchell and published by . This book was released on 1990 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissociative Recombination of Small Molecular Ions written by Petrus M. Mul and published by . This book was released on 1981 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Pint of New House written by and published by . This book was released on 1977 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Products of Dissociative Recombination in the Ionosphere written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: SRI International undertook a novel experimental measurement of the product states formed by dissociative ro-combination (DR) of C2(+), NO(+), and N2(+) as a function of both electron energy and reactant ion vibrational level. For these measurements we used a recently developed experimental technique for measuring dissociation product distributions that allows both the branching ratios to be accurately determined and the electronic and ro-vibrational state composition of the reactant ions to be specified. DR is the dominant electron loss mechanism in all regions of the ionosphere. In this process, electron attachment to the molecular ion produces an unstable neutral molecule that rapidly dissociates. Cosby, Philip Unspecified Center...
Download or read book Electron ion and Ion ion Dissociative Recombination of Oxygen written by Fui Tak Chan and published by . This book was released on 1967 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissociative Recombination of Stored and Phase spaced Cooled Molecular Ions in CRYRING written by and published by . This book was released on 1993 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion storage rings offer several advantages for studies of recombination of molecular ions by electrons, a process which in general leads to dissociation. During the last year dissociative recombination of H3, HD, H2+, D2+, 3HeH+, 4HeH+ and 4HeD+ have been studied in storage rings in Stockholm, Heidelberg, Tokyo and Aarhus. Only a fraction of the results obtained at these places have been processed to the point where they have been published in the literature. Hence, the discussion of some of the results in this article must be regarded as tentative.
Download or read book Inelastic Collisions and Recombination Between Electrons and Molecular Ions written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Inelastic collisions between molecular ions and slow electrons play an important role in naturally occurring ionized media and involve interesting interaction mechanisms which are also under intense theoretical study. Several experiments focused on the collision of small molecular ions with electrons were carried out at the heavy-ion storage ring TSR, located at the Max-Planck-Institut für Kernphysik, Heidelberg. Using the Coulomb explosion imaging technique it was possible to monitor vibrational cooling of the stored homonuclear molecular ions H_2^+ and D_2^+ it could be shown that the cooling is only due to the interaction of electrons with the molecular ions in super-elastic collisions (SEC) where internal energy is transferred to the scattered electron. This process is closely related to dissociative recombination (DR). For the DR and SEC of H_2^+ and D_2^+ ions with near-zero kinetic energy electrons absolute vibrational state specific rate coefficients were measured for the first time. Another series of experiments was focused on the investigation of final fragment states in the DR of LiH^+ and HeH^+. The electronic structure of these ions and the corresponding neutral molecules is such that DR proceeds via a non-adiabatic coupling of electronic and vibrational motion at short internuclear distances. The experiments revealed a dominant population of the highest energetically accessible final fragment states in such reactions. In addition, also the absolute rate coefficient for the DR of LiH^+ molecules with slow electrons was measured.
Download or read book Proceedings of the 1995 Workshop on Dissociative Recombination written by Daniel Zajfman and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Methods for Electron Molecule Collisions written by Franco A. Gianturco and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collision of electrons with molecules and molecular ions is a fundamental pro cess in atomic and molecular physics and in chemistry. At high incident electron en ergies, electron-molecule collisions are used to deduce molecular geometries, oscillator strengths for optically allowed transitions, and in the case of electron-impact ionization, to probe the momentum distribution of the molecule itself. When the incident electron energy is comparable to or below those of the molecular valence electrons, the physics involved is particularly rich. Correlation and exchange effects necessary to describe such collision processes bear a close resemblance to similar efft:cts in the theory of electronic structure in molecules. Compound state formations, in the form of resonances and vir tual states, manifest themselves in experimental observables which provide details of the electron-molecule interactions. Ro-vibrational excitations by low-energy electron collisions exemplify energy transfer between the electronic and nuclear motion. The role of nonadiabatic interaction is raised here. When the final vibrational state is in the continuum, molecular dissociation occurs. Dissociative recombination and dissociative attachment are examples of such fragmentation processes. In addition to its fundamental nature, the study of electron-molecule collisions is also motivated by its relation to other fields of study and by its technological appli cations. The study of planetary atmospheres and the interstellar medium necessarily involve collision processes of electrons with molecules and molecular ions.
Download or read book Proceedings of the 1995 Workshop on Dissociative Recombination written by Daniel Zajfman and published by World Scientific Publishing Company Incorporated. This book was released on 1996 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
