Author: Tao ZhangPublisher:
ISBN:
Category :
Languages : en
Pages : 406
Book Description
State-selected Study of Ion-molecule Reaction Dynamics, Photodissociation Dynamics and Free Radical Studies Using Synchrotron Radiation
Author: Tao ZhangDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 882
Book Description
Reaction Dynamics of Multiphoton Ionization State-selected Polyatomic Ion-molecule Reactions
Author: Hunghsin FuPublisher:
ISBN:
Category : Chemical reactions
Languages : en
Pages : 320
Book Description
Special Issue on Atoms and Molecules Studies with Synchrotron Radiation
Author: Irène NennerPublisher:
ISBN:
Category : Photoionization
Languages : en
Pages :
Book Description
Scientific and Technical Aerospace Reports
Author: Special Issue on Atoms and Molecules Studied with Synchrotron Radiation
Author: Irène NennerPublications of the National Institute of Standards and Technology ... Catalog
Author: National Institute of Standards and Technology (U.S.)Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 424
Book Description
Applications of Third Generation Synchrotron Radiation in Vacuum Ultra-violet (VUV) Photoionization Spectroscopy and Dynamics
Author: Ximei QianPhotodissociation of Small Molecules and Photoionization of Free Radicals Using the VUV Velocity-map Imaging Photoion and Photoelectron Method
Author: Hong GaoPublisher:
ISBN: 9781303442544
Category :
Languages : en
Pages :
Book Description
The tunable vacuum ultraviolet (VUV) laser generated through the two-photon resonance-enhanced four-wave mixing scheme is combined with the newly developed time-slice velocity map imaging photoion method to study the photodissociation of small molecules in the VUV region, and with the velocity map imaging photoelectron method to study the photoionization of free radicals. The photodissociation dynamics of NO in the energy region around 13.5 eV has been investigated. Branching ratios of the three lowest dissociation channels of 12C16O that produce C(3P) + O(3P), C(1D) + O(3P) and C(3P) + O(1D) are measured for the first time in the VUV region from 102,500 cm−1 to 110,500 cm−1, valuable information of the dissociation dynamics for this prototype system has been deduced. We demonstrated an experiment that has two independently tunable VUV lasers and a time-slice velocity map imaging setup, this provides us a global way to perform systematic state-selected photodissociation of small molecules via state-selected detection of the atomic products in the VUV region. The velocity map imaging photoelectron method was successfully used to obtain the photoelectron spectrum of the propargyl radical (C3H3) via a single VUV photoionization process. The propargyl radical is generated by the 193 nm laser photodissociation of the precursor C3H3Cl. This is the first time that the velocity map imaging photoelectron method is used to get the photoelectron spectra of free radicals, indicating that it is a powerful technique for studying the photoionization of free radicals which are always hard to be produced with high enough number densities for spectroscopic studies.
Photodissociation Spectroscopy and Dynamics of Free Radicals, Clusters, and Ions
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 169
Book Description
The photodissociation spectroscopy and dynamics of free radicals and ions is studied to characterize the dissociative electronic states in these species. To accomplish this, a special method of radical production, based on the photodetachment of the corresponding negative ion, has been combined with the technique of fast beam photofragment translational spectroscopy. The photofragment yield as a function of photon energy is obtained, mapping out the dissociative and predissociative electronic states. Branching ratios to various product channels, the translational energy distributions of the fragments, and bond dissociation energies are then determined at selected photon energies. The detailed picture of photodissociation dynamics is provided with the aid of ab initio calculations and a statistical model to interpret the observed data. Important reaction intermediates in combustion reactions have been studied: CCO, C2H5O, and linear C{sub n} (n = 4--6).