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Molecular Reaction Dynamics Via High N Rydberg Hydrogen Atom Time Of Flight Spectroscopy
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Book Synopsis Molecular Reaction Dynamics Via High-n Rydberg Hydrogen Atom Time-of-flight Spectroscopy by : Ye Wen
Download or read book Molecular Reaction Dynamics Via High-n Rydberg Hydrogen Atom Time-of-flight Spectroscopy written by Ye Wen and published by . This book was released on 1994 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photodissociation and Reaction Dynamics of Small Molecules and Free Radicals Via High-n Rydberg Hydrogen Atom Time of Flight Spectroscopy by : Kesheng Xu
Download or read book Photodissociation and Reaction Dynamics of Small Molecules and Free Radicals Via High-n Rydberg Hydrogen Atom Time of Flight Spectroscopy written by Kesheng Xu and published by . This book was released on 2001 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics Studies Using Rydberg Atom Time-of-flight Spectroscopy by : Cheng Lin
Download or read book Dynamics Studies Using Rydberg Atom Time-of-flight Spectroscopy written by Cheng Lin and published by . This book was released on 2003 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probing Reaction Dynamics with Oxygen Rydberg Time-of-flight Spectroscopy by : Mark Francis Witinski
Download or read book Probing Reaction Dynamics with Oxygen Rydberg Time-of-flight Spectroscopy written by Mark Francis Witinski and published by . This book was released on 2006 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Trends in Chemical Reaction Dynamics by : Xueming Yang
Download or read book Modern Trends in Chemical Reaction Dynamics written by Xueming Yang and published by World Scientific. This book was released on 2004 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Provides a detailed picture of the current status of advanced experimental and theoretical research in chemical reaction dynamics. Topics include the Doppler-selected time-of-flight technique, multimass ion imaging, and photodissociation dynamics of free radicals.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2000 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis State-to-state Reaction Dynamics of H + D2 and the Alignment and Orientation of Hydrogen Molecules by : Nathaniel Chung-Ming Bartlett
Download or read book State-to-state Reaction Dynamics of H + D2 and the Alignment and Orientation of Hydrogen Molecules written by Nathaniel Chung-Ming Bartlett and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis details part of the ongoing experimental effort on the investigation of the dynamics of the simplest neutral bimolecular reaction system: H + D2 hydrogen exchange. A combination of molecular beam and laser-based spectroscopic techniques have been used to produce H + D2 collisions under single collision conditions, and the three-dimensional velocity distribution of state-selected HD(v', j') reaction products is captured by ion imaging. HBr and D2 are pre-mixed and co-expanded into high vacuum through a pulsed nozzle. The co-expansion produces rotationally cooled reagents with very little relative translational energy between them. The molecular beam is collimated by a skimmer before being intersected with a narrow-linewidth tunable ultraviolet laser pulse which cleaves the HBr bond, producing nearly monoenergetic H atoms which can then react with D2 molecules. Nascent HD(v', j') is state-selectively ionized via resonance-enhanced multiphoton ionization (REMPI) using radiation from another narrow-linewidth tunable ultraviolet laser pulse. This process takes place within the extraction region of a linear time-of-flight mass spectrometer fitted with an imaging detector. This configuration allows the three-dimensional velocity of individual HD(v', j') products to be recorded. Velocity distributions are analyzed and converted into center-of-mass frame scattering angle distributions or differential cross sections (DCS) using photoloc. Using these methods state-to-state differential cross sections have been measured for H + D2(v'=0, j'=0,1,2) --> HD(v'=2, j'=0,3,6,9) + D for collision energies of Ec = 1.25, 1.61, and 1.97 eV. The DCSs are compared to those calculated by Foudhil Bouakline and Stuart Althorpe after being "blurred" according to our experimental conditions. The measured DCSs are in most cases in good agreement with the calculated ones, and show the expected behavior for this reaction system which takes place via a direct recoil mechanism through a collinear transition state geometry. For a given collision energy, as the HD rotational state increases the DCSs shift from being strongly peaked in the backward scattering region to being peaked toward more sideward angles. For a given HD rotational state, as the collision energy increases the DCSs narrow and become peaked at slightly larger angles. The HD(v'=2, j'=0) state produced from reactive collisions at Ec = 1.25 eV displays unique scattering behavior in that its DCS is bimodal. This suggests that there are two competing mechanisms available for this product at this collision energy. The first is the same direct recoil mechanism responsible for product formation of all other rotational state/collision energy combinations investigated. The second is an indirect mechanism opened by a barrier resonance in which the transition state is able to rotate a fraction of a cycle before breaking apart into products. The dynamics observed here are overall similar to that found in related H + D2(v'=0, j'=0,1,2) --> HD(v'=1,3, j') reactive scattering studies performed by our group. Additionally, in a series of adjacent experiments, stimulated Raman pumping (SRP) with polarized light was used to prepare highly aligned and oriented samples of vibrationally-rotationally excited hydrogen molecules in a molecular beam expansion under collision-free conditions. Of particular significance, the (1,0) S(0) SRP line was used to prepare samples of H2(v=1, j=2, M=0) and H2(v=1, j=2, M=2) using linear or circularly polarized light, respectively. After excitation the degree of alignment was monitored using resonance-enhanced multiphoton ionization also with polarized light. This rotational level is not subject to hyperfine depolarization and we find that the samples produced retain their initial degree of alignment or orientation for up to 8 [Mu]s which makes them quite suitable for serving as aligned targets in H + H2 scattering experiments. The same SRP scheme was also used to produce aligned samples of HD(v=1, j=2, M=0) and D2(v=1, j=2, M=0) as well, both of which undergo hyperfine depolarization, through the coupling of the molecules' rotational angular momentum to the nuclear spin angular momenta. The result is that the degree of alignment becomes an oscillatory function of time, which again can be observed using REMPI. We compare the measured time-dependent alignment with a theoretical calculation for HD(v=0, j=2, M=0) and D2(v=0, j=2, M=0) and find the agreement to be within our experimental error. Thus we conclude that the hyperfine constants do not strongly vary with the vibrational state.
Book Synopsis UV-photodissociation Dynamics of Small Molecules and Free Radicals Studied by High-n Rydberg H-Atom Time of Flight Spectroscopy by : Gabriel Alejandro Amaral
Download or read book UV-photodissociation Dynamics of Small Molecules and Free Radicals Studied by High-n Rydberg H-Atom Time of Flight Spectroscopy written by Gabriel Alejandro Amaral and published by . This book was released on 2001 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1985 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis State-to-State Dynamical Research in the F+H2 Reaction System by : Zefeng Ren
Download or read book State-to-State Dynamical Research in the F+H2 Reaction System written by Zefeng Ren and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses two important and also challenging issues in the research of chemical reaction dynamics of F+H2 system. One is to probe the reaction resonance and the other is to determine the extent of the breakdown of the Born-Oppenheimer approximation (BOA) experimentally. The author introduces a state-of-the-art crossed molecular beam-scattering apparatus using a hydrogen atom Rydberg "tagging" time-of-flight method, and presents thorough state-to-state experimental studies to address the above issues. The author also describes the observation of the Feshbach resonance in the F+H2 reaction, a precise measurement of the differential cross section in the F+HD reaction, and validation of a new accurate potential energy surface with spectroscopic accuracy. Moreover, the author determines the reactivity ratio between the ground state F(2P3/2) and the excited state F*(2P1/2) in the F+D2 reaction, and exploits the breakdown of BOA in the low collision energy.
Book Synopsis Dynamics Studies of Free Radical Reactions Using Hydrogen Rydberg Time-of-flight Spectroscopy by : Mariví Ortiz-Suárez
Download or read book Dynamics Studies of Free Radical Reactions Using Hydrogen Rydberg Time-of-flight Spectroscopy written by Mariví Ortiz-Suárez and published by . This book was released on 2007 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encyclopedia of Chemical Physics and Physical Chemistry: Fundamentals by : John H. Moore
Download or read book Encyclopedia of Chemical Physics and Physical Chemistry: Fundamentals written by John H. Moore and published by Taylor & Francis. This book was released on 2001 with total page 1178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology 1988 Catalog by : Rebecca J. Pardee
Download or read book Publications of the National Institute of Standards and Technology 1988 Catalog written by Rebecca J. Pardee and published by . This book was released on 1989 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rydberg States of Atoms and Molecules by : R. F. Stebbings
Download or read book Rydberg States of Atoms and Molecules written by R. F. Stebbings and published by Cambridge University Press. This book was released on 1983-04-29 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: After the development of the tunable laser, experimental studies in Rydberg states of atoms and molecules grew at a remarkable rate. Fundamental questions were resolved, opening doors for more experimental activity and theoretical inquiry. In this comprehensive summary of knowledge of Rydberg states, which was originally published in 1983, Professors Stebbings and Dunning brought together a select collection of experimental and theoretical discussions. Composed of works by the acknowledged leaders in the field, this volume will be of value for anyone with an interest in molecular physics.
Book Synopsis Publications of the National Bureau of Standards ... Catalog by : United States. National Bureau of Standards
Download or read book Publications of the National Bureau of Standards ... Catalog written by United States. National Bureau of Standards and published by . This book was released on 1984 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: