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 20 of 27 for “"photoabsorption"”.
-
Electronic properties of metal-organic and organic-organic interfaces studied by photoemission and photoabsorption spectroscopy
… was studied by means of photoemission and photoabsorption spectroscopy. A detailed analysis of the core-level PE spectra allows one to propose possible lattice sites, which harbor the potassium ions. Contrasting to a few results reported in the literature, the films prepared in this thesis …
-
One and two photon absorption of atoms and ions
One and two-photon photoabsorption of atoms and ions is the primary focus of this study, with special emphasis on photoabsorption in a laser-produced strontium plasma. The dual laser plasma (DLP) technique has been employed to carry out these studies and adapted to include an optical parametric …
-
Absolute molecular electronic spectroscopy at UV and soft X-Ray energies by hihg-energy electron impact
… spectroscopy has been used to determine absolute photoabsorption oscillator strengths (cross sections) for electronic excitation of CC14, CH3OH, NH3, CH3NH2, (CH3)2NH, and (CH3)3N at energy resolutions in the range 0.048-1.0 eV fwhm. These data have been obtained in the valence, and inner shells …
-
Core excitons in amorphous magnesium alloys
High resolution photoabsorption spectra were obtained in the range 40200 eV for Mg-Group V alloys. Sharp line structure was discovered for amorphous alloys of Mg-Bi and Mg-Sb near the photoabsorption threshold of the Mg 2p core level. These lines were strongest for compositions corresponding to the …
-
Gas phase vacuum-ultraviolet (vuv) spectroscopy of small halogenated polyatomic molecules
… series (M = C, Si and Ge) where both the VUV photoabsorption and fluorescence spectra were recorded. A new analysis of the absorption spectra is presented. Emissions are observed in MCl\(_2\), MCl and the parent ion of SiCl\(_4^+\) and GeCl\(_4^+\). The CF\(_3\)X series (X = H, F, Cl, Br, I …
-
Elastic photon scattering from 4He between 23 and 73 MeV
… in this experiment place constraints on the peak photoabsorption of the giant dipole resonance, which has been in dispute, and place limits on the electromagnetic polarizabilities of the bound nucleon in 4He.
-
Elastic photon scattering from helium-4 between 23 and 73 MeV
… in this experiment place constraints on the peak photoabsorption of the giant dipole resonance, which has been in dispute, and place limits on the electromagnetic polarizabilities of the bound nucleon in $\sp4$He.
-
An investigation of the natural line shape of the giant dipole resonance.
An investigation of photoabsorption experiments in the spherical nucleus 141Pr, the quasispherical dynamically deformed 197Au, and the statically deformed 165Ho showed that the best function for the energy dependence of the reduced transition probability is given by the Breit-Wigner form rather …
-
La spectroscopie des complexes de transfert de charge peut contribuer à l'interprétation du premier potentiel d'ionisation du donneur (éthylenimine, oxyde d'éthylene, sulfure d'éthylene)
… of a donor compound and the position of the UV photoabsorption band of the complex of this donor with iodine as an acceptor are carefully analyzed. Their specificity with respect to (i) the adiabatic and vertical IE and (ii) the nature of the ionized orbital (n or pi) is examined. This analysis …
-
Elastic photon scattering in 208Pb and 206Pb
… is a significant amount of fine structure in the photoabsorption cross section in 208pb in this energy region, but that 206pb has little or no fine structure. Three concentrations of strength in 208pb at 10.04, 10.60, and 11.27 MeV have been found to be mainly dipole. This is in disagreement with …
-
Optical properties of confined and unconfined excitons in semiconductor quantum heterostructures
… exciton continuum states properly and hence the photoabsorption coefficient. These techniques are applied to calculate the electroabsorption, resonant Raman scattering in GaAs quantum wells, and absorption of above barrier excitons in both type I and type II heterostructures. We find that the …
-
Photon scattering from 16O above the giant dipole resonance
… scattering differential cross sections and total photoabsorption cross sections to determine the isovector E2 strength and to measure the electric polarizability (a) and magnetic polarizability ({l) of a nucleon bound in 160. We find that there are no significant compact E2 resonances within the …
-
Electronic and structural properties of rare gas cation clusters
… results with experiments through calculations of photoabsorption cross section and magic numbers.
-
Photofragmentation of carbonyl sulfide (Ocs) following core-shell photoexcitation and photoionization
… above-threshold structures in the OCS photoabsorption spectra. Post-collision-interaction effects in OCS and locality of the lowest unoccupied molecular orbital 4pi* at the sulfur atom are also evidenced in the anion spectra.
-
Strechable crumpled graphene photodetector with plasmonically-enhanced photoresponsivity
… However, the low stretchability and limited photoabsorption of graphene have restricted its applications in flexible and high-sensitivity photodetection systems. Various hybrid systems based on photonic or plasmonic nanostructures have been introduced to improve the limited photoresponsivity …
-
Three-dimensional nanotube arrays for solar energy harvesting and production of solar fuels
… layers due to the ability of improving photoabsorption, photocurrent generation and transport in nanometer scale. Vertically aligned, highly uniform nanorods and nanowire arrays for solar energy conversion have been explored as potential candidates for solar energy conversion and …
-
Coincident neutron/proton pairs from 6̳Li photodisintegration with 40-100 MeV photons
… momentum of the neutron-proton pair prior to the photoabsorption. The distribution of recoil momentum transverse to the photon beam had a central peak of width 96.8±3.5 MeV /c (FWHM); this is consistent with a harmonic oscillator 2s wave function description of the pair-41-Ie relative motion with …
-
Computational methods for small-molecule transparent semiconductors
… hybrid functionals in order to compute accurate photoabsorption spectra with relatively low computational cost. Additionally, we utilize molecular graph neural networks as a means to leverage quantum mechanical datasets to accelerate the materials discovery process. These methods are combined to …
-
Contribution of the First Electronically Excited State of Molecular Nitrogen to Thermospheric Nitric Oxide
… both back to their origins in the primary photoabsorption and photoelectron impact processes. The photoelectron impact ionization of N₂ is shown to be the main driver of the midday NO production while the photoelectron impact dissociation of N₂ is the main NO destroyer. The net …
-
Giant multipole resonances in lead-208
… angles from 450 to 1350 inclusive. The total photoabsorption cross section as well as the cross sections for leaving 207pb in its ground st ate and first two excited states were extracted. The data confirm the fine structure seen in earlier photoneutron studies and this structure is found to …
Page 1 of 2