Author: Daniel StrasserPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Dissociative Recombination of Polyatomic Ions
Author: Daniel StrasserDissociative Recombination of Molecular Ions
Author: Mats LarssonPublisher: Cambridge University Press
ISBN: 9781107407671
Category : Science
Languages : en
Pages : 394
Book Description
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.
Dissociative Recombination
Author: Bertrand R. RowePublisher: Springer Science & Business Media
ISBN: 146152976X
Category : Science
Languages : en
Pages : 277
Book Description
Proceedings of a NATO ARW held in Saint Jacut de la Mer, Brittany, France, May 3-8, 1992
Dissociative Recombination of Polyatomic Ions
Author: David R. BatesPublisher:
ISBN:
Category : Astronomy
Languages : en
Pages :
Book Description
Dissociative Recombination of Molecular Ions with Electrons
Author: Steven L. GubermanPublisher: Springer Science & Business Media
ISBN: 1461500834
Category : Science
Languages : en
Pages : 467
Book Description
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.
Symmetry in the Dissociative Recombination of Polyatomic Ions and in Ultra-cold Few Body Collisions
Author: Nicolas DouguetPublisher:
ISBN:
Category :
Languages : en
Pages : 149
Book Description
We discuss the role of symmetries in the dissociative recombinations (DR) of three polyatomic ions, namely the linear HCO+ ion and the two highly symmetric H3+ and H3O+ molecular ions. Regarding the HCO+ ion, we apply a quantum mechanical treatment using the Multi-channel Quantum Defect Theory (MQDT) formalism to describe the ion-electron scattering process. Our study takes into account the Renner-Teller effect in order to model the non Born-Oppenheimer vibronic coupling in linear polyatomic ions. We have also improved the theoretical approach by including the large permanent dipole moment of HCO+ using a generalization of the MQDT formalism. The obtained results are in good agreement with experimental data. We also study the DR of H3+ and H3O+ symmetric ions using a simplified theoretical treatment, which focuses on the key ingredient of the DR process, the electron capture in the first excited degenerate vibrational normal mode of the ions through non Born-Oppenheimer Jahn-Teller coupling. For both ions the obtained cross sections are in good agreement with the available experimental data. Finally, we investigate the role of symmetries in few body ultra-cold collisions by considering both three and four identical atoms systems. We derive allowed rearrangements of different fragments of the system, satisfying the complete symmetry of the molecular Hamiltonian. For that purpose we establish a correspondence between constants of motion of the system in different large-distance configurations and irreducible representations of the total symmetry group. Selection rules and allowed states can be derived from these results.
General Features of the Dissociative Recombination of Polyatomic Molecules
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We discuss some aspects of a simple expression for the low-energy dissociative recombination cross section that applies when the recombination process is dominated by the indirect mechanism. In most previous applications, this expression has been applied to capture into vibrationally excited Rydberg states with the assumption that capture is always followed by prompt dissociation. Here we consider the dissociative recombination of larger polyatomic ions and electrons. More specifically, we consider capture into electronically core-excited Rydberg states, and begin to assess its potential importance for larger systems.
Branching Ratios in Dissociative Recombination of Polyatomic Ions at CRYRING
Author: Alik M. DerkatchDynamics in the Dissociative Recombination of Small Polyatomic Molecular Ions
Author: Vitali ZhaunerchykPublisher:
ISBN: 9789171556738
Category :
Languages : en
Pages : 109
Book Description
Author: D. R. Bates