Collisions, chemical reactions and

Elastic collisions and chemical reactions in the sheath lead to a broad angular distribution of the ion velocity at the electrode. Examples for SiH and SiH are the abstraction reactions SiH -I- SiH4 SiH4 -f- SiH [330] and SiH - -SiH4 —> SiH + SiH3 [331], Due to the small acceptance angle of the EQP, these processes are only in part reflected in the lED [163, 332]. 

The basic theories of physics - classical mechanics and electromagnetism, relativity theory, quantum mechanics, statistical mechanics, quantum electrodynamics - support the theoretical apparatus which is used in molecular sciences. Quantum mechanics plays a particular role in theoretical chemistry, providing the basis for the valence theories which allow to interpret the structure of molecules and for the spectroscopic models employed in the determination of structural information from spectral patterns. Indeed, Quantum Chemistry often appears synonymous with Theoretical Chemistry it will, therefore, constitute a major part of this book series. However, the scope of the series will also include other areas of theoretical chemistry, such as mathematical chemistry (which involves the use of algebra and topology in the analysis of molecular structures and reactions) molecular mechanics, molecular dynamics and chemical thermodynamics, which play an important role in rationalizing the geometric and electronic structures of molecular assemblies and polymers, clusters and crystals surface, interface, solvent and solid-state effects excited-state dynamics, reactive collisions, and chemical reactions. 

Quantum Systems in Chemistry and Physics is a broad area of science in which scientists of different extractions and aims jointly place special emphasis on quantum theory. Several topics were presented in the sessions of the symposia, namely 1 Density matrices and density functionals 2 Electron correlation effects (many-body methods and configuration interactions) 3 Relativistic formulations 4 Valence theory (chemical bonds and bond breaking) 5 Nuclear motion (vibronic effects and flexible molecules) 6 Response theory (properties and spectra atoms and molecules in strong electric and magnetic fields) 7 Condensed matter (crystals, clusters, surfaces and interfaces) 8 Reactive collisions and chemical reactions, and 9 Computational chemistry and physics. 

Reactive collisions and chemical reactions (Chair R. G. Woolley)... 

When the dynamics of a molecular system is studied, we have to choose a set of coordinates to describe the system. There are many possibilities and in the following we will focus on coordinates that are convenient in the analysis of molecular collisions and chemical reactions. 

Part VIII. Reactive Collisions and Chemical Reactions... 

FIGURE 8.2 Collisions and chemical reactions. Some collisions are successful and some are not. The difference is determined to a great extent by the kinetic energy of the particles. 

Inelastic Collisions and Chemical Reactions of Molecules at Ultracold Temperatures... 

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