Author: Donna Anne OswaldPublisher:
ISBN:
Category : Energy transfer
Languages : en
Pages : 264
Book Description
Studies of Vibrational Energy Transfer and Relaxation
Author: Donna Anne OswaldPublisher:
ISBN:
Category : Energy transfer
Languages : en
Pages : 264
Book Description
Introduction to Molecular Energy Transfer
Author: James YardleyPublisher: Elsevier
ISBN: 0323156037
Category : Science
Languages : en
Pages : 321
Book Description
Introduction to Molecular Energy Transfer intends to provide an elementary introduction to the subject of molecular energy transfer and relaxation. The book covers the foundation of molecular energy transfer such as quantum mechanics; the vibrational state of molecules; and vibrational energy transfer and the experimental methods for its study. Coverage also includes the different kinds of energy transfer in gases; vibrational relaxation in condensed phases; electronic states and interactions; electronic energy as a result of intermolecular interaction; radiationless electronic transition; and rotational energy transfer. The text is recommended for students, graduates, and researchers in the fields of physics and chemistry, especially those who would like to know more about molecular energy transfer.
Dynamics of Molecular Collisions
Author: W. MillerPublisher: Springer Science & Business Media
ISBN: 1475706448
Category : Science
Languages : en
Pages : 391
Book Description
Activity in any theoretical area is usually stimulated by new experimental techniques and the resulting opportunity of measuring phenomena that were previously inaccessible. Such has been the case in the area under consideration he re beginning about fifteen years aga when the possibility of studying chemical reactions in crossed molecular beams captured the imagination of physical chemists, for one could imagine investigating chemical kinetics at the same level of molecular detail that had previously been possible only in spectroscopic investigations of molecular stucture. This created an interest among chemists in scattering theory, the molecular level description of a bimolecular collision process. Many other new and also powerful experimental techniques have evolved to supplement the molecular be am method, and the resulting wealth of new information about chemical dynamics has generated the present intense activity in molecular collision theory. During the early years when chemists were first becoming acquainted with scattering theory, it was mainly a matter of reading the physics literature because scattering experiments have long been the staple of that field. It was natural to apply the approximations and models that had been developed for nuclear and elementary particle physics, and although some of them were useful in describing molecular collision phenomena, many were not.
Studies in Vibrational Energy Transfer
Author: Robert Leonard BrownIntermolecular and Intramolecular Vibrational Relaxation and Energy Transfer
Author: Shaul MukamelPublisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
This research program resulted in 53 publications. 43 already appeared, 4 are accepted for publication, and 6 were submitted. These publications are listed at the end of the final report. The research focused in the following major areas: (1) molecular semi-classical dynamics in Liouville space; a unified description of vibrational relaxation nonlinear spectroscopy and rate processes; (ii) intramolecular vibrational redistribution; (iii) vibrational and radiative dynamics in molecular clusters; (iv) coherent and spontaneous Raman, fluorescence and four-wave mixing spectroscopy; (v) excitation transport, electron transfer, and localization in disordered molecular systems. The main accomplishments are summarized in the final report. Molecular semiclassical dynamics, Vibrational relaxation, Nonlinear spectroscopy, Energy transfer, Molecular systems. (MJM).
Vibrational Energy Transfer Rate Studies in Shock-heated Carbon Dioxide-helium Mixtures by Infrared Emissions and Tuned-laser Absorption
Author: Shivshankar Gopala PrakashPublisher:
ISBN:
Category : Energy transfer
Languages : en
Pages : 206
Book Description
Flow-Tube Studies of Vibrational Energy Transfer HF(v) + HF, DF(v) + HF, and DF(v) + D2 Systems
Author: Munson A. KwokPublisher:
ISBN:
Category :
Languages : en
Pages : 49
Book Description
A medium-pressure (1-Torr), large-diameter (10-cm) flow tube has been used to measure rate coefficients at 298 K for (1) total relaxation (sum of vibrational-vibrational and vibrational-rotational, translational processes) of HF(v= 1,2, 3, 4, and 5) by HF, (2) relaxation of DF(1, 2, 3, and 4) by HF, and (3) overall relaxation of DF(v = 1, 2, 3, and 4) by D2. The chemically produced vibrationally excited HF or DF species have been studied by monitoring their vibrational-rotational emission in a fast-flow system. The rate coefficient for the relaxation of HF(1) by HF is 53000/sec torr. The measured rate coefficients for the de-excitation of HF(v= 2, 3, 4, and 5) by HF are 530000, 800000, 880000 and 280000/sec Torr, respectively. The rate coefficients for the vibrational-rotational, translational de-excitation from the upper vibrational levels of DF(v) by HF are found to have a nonlinear vibrational dependence. The rate coefficient for the relaxation of DF(v = 1) by D2 is 13500/sec Torr. (Author).
Experimental Investigations of Intermolecular Vibrational Energy Transfer
Author: Kristie A. BoeringVibrational Relaxation and Energy Transfer in Solids
Author: Max BerkowitzVibrational Relaxation and Energy Transfer of Matrix Isolated HCl and DCl
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Vibrational kinetic and spectroscopic studies have been performed on matrix-isolated HCl and DCl between 9 and 20 K. Vibrational relaxation rates for v = 2 and v = 1 were measured by a tunable infrared laser-induced, time-resolved fluorescence technique. In an Ar matrix, vibrational decay times are faster than radiative and it is found that HCl relaxes about 35 times more rapidly than CCl, in spite of the fact that HCl must transfer more energy to the lattice than DCl. This result is explained by postulating that the rate-determining step for vibrational relaxation produces a highly rotationally excited guest in a V yield R step; rotational relaxation into lattice phonons follows rapidly. HCl v = 1, but not v = 2, excitation rapidly diffuses through the sample by a resonant dipole-dipole vibrational energy transfer process. Molecular complexes, and in particular the HCl dimer, relax too rapidly for direct observation, less than or approximately 1 .mu.s, and act as energy sinks in the energy diffusion process. The temperature dependence for all these processes is weak--less than a factor of two between 9 and 20 K. Vibrational relaxation of HCl in N2 and O2 matrices is unobservable, presumably due to rapid V yield V transfer to the host. A V yield R binary collision model for relaxation in solids is successful in explaining the HCl(DCl)/Ar results as well as results of other experimenters. The model considers relaxation to be the result of ''collisions'' due to molecular motion in quantized lattice normal modes--gas phase potential parameters can fit the matrix kinetic data.