Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"electron pair"”.
-
Electron-Pair Productionin in Pb-Au Collisions at 40 AGeV
Die vorliegende Arbeit enthaelt die ersten experimentellen Resultate zur Elektronen-paar-Produktion aus dem CERES/NA45 Experiment am CERN SPS seit der zusaetz-lichen Installation einer TPC. Die Daten stammen aus einer Strahlzeit im Jahr 1999 mit einem Pb-Strahl von 40 AGeV. Aus insgesamt 8 …
-
Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES
… is devoted to the measurement of low-mass electron pairs in proton and ion-induced collisions at the Super Proton Synchrotron accelerator. The main goal of the CERES experiment is to investigate modifications of hadron properties in hot and dense nuclear matter. A significant enhancement of …
-
Density Functional Theory Study of Rutile SiO₂ Stishovite: An Electron Pair Description of Bulk and Surface Properties
… density functional method. The geometric and electronic structure, including the density of states, charge density, and electron localization function for both the bulk and the surface have been examined. The electron pair properties of both bulk and surface-layer atoms were found to be …
-
An Investigation of Malaysian Secondary School Students’ Mental Models of Acid-Base Chemistry
… Acid-Base Equilibrium, Buffers, and Acid-Base Electron Pair Bonding while the four acid-base models are the Phenomenological, Arrhenius, Brønsted-Lowry, and Lewis models. To determine the nature of students’ mental models, attributes of these models were identified and gathered from students’ …
-
NMR studies of the exchange reactions of CH3CN.BX3 with excess CH3CN /|nJoseph Fogelman. -- 260 St. Catharines, Ont. : [s. n.],
… the following characteristics (1),(2) (i) high electron density at the donor site. (ii) a non-bonded electron pair which has a low ionization potential (iii) electron donating substituents at the donor atom site. (iv) facile approach of the site of the Lewis base to the acceptor site as dictated …
-
Energy Derivatives of Correlated Wavefunctions: A Matrix Directed Approach (Dimagnesium)
… derivative of the correlated Self-Consistent Electron Pair (SCEP) wavefunction are presented. The matrix directed, pair operator approach used within the SCEP formalism allows certain redundancies found in ordinary configurational-type correlated derivative calculations to be eliminated. …
-
The Physico-chemical Nature of the Chemical Bond: Valence Bonding and the Path of Physico-chemical Emergence
… hypothesis following the discovery of the electron at the turn of the twentieth century, which afforded theoretical study of chemical bonding. Between 1916 and 1919, Gilbert N. Lewis and Irving Langmuir proposed the valence bond to be a pair of electrons shared between two atoms, within the …
-
Multidentate Alkanethiols with Cyclohexyl and Pyridyl Frameworks Forming Self-Assembled Monolayers on Gold
… spectroscopy (PM-IRRAS), and X-ray photoelectron spectroscopy (XPS). CyTSH was found to generate multilayer thin films with many unbound thiol species and oxidized sulfur moieties (e.g., disulfides and sulfone). In contrast, 3C1CyTSH was found to generate monolayer films in which ~90% of …
-
Development Of Quantitative FT- IR Methods For Analyzing The Cure Kinetics Of Epoxy Resins
… butane and dipropylether that represent ð-bond, electron pair on amine, epoxide and ether groups. Simple mass-action</p> <p>equilibrium models of the amine and hydroxyl group hydrogen bonding were developed, where both the extinction coefficient and equilibrium constants were determined from the …
-
Heterogenous catalysis of inorganic reactions
… i.e. as proton acceptors (base catalysis) and as electron pair acceptors (Lewis acid catalysis). Thus, the two possible activation mechanisms that agree with the experimental observations, appear to be: i) association of a halide ion with an accessible Lewis site (e.g. Al—OH2 and/or (AJ-0)2Cr 4), …
-
Design of a positron beam for the study of the entanglement in three gamma-rays generated by positronium annihilation
The positron is the antiparticle of the electron. In general, for any particle there exists a corresponding antiparticle. The two are identical except for the charges, i.e. electric charge, leptonic number, muonic number, ..., which are equal in module but opposite sign. Examples are the electron …