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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"excitation spectra"”.
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TDDFT calculations for excitation spectra of solids and superstructures utilizing mGGA
… we apply TDDFT plus mGGA to calculate optical spectra for bulk solids. The result shows good agreement with experimental data. III-V ternary alloys AxB1−xC are promising materials for optoelectronic, high-speed electronic and microwave applications, such as infrared emitting diodes and …
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Absorption and luminescent excitation spectra of F and M centers in Kcl and NaF
Luminescent excitation spectra were measured for the F and M centers in KCl; in particular, for the F band, M band, and the M2 transition. In all 3 cases, the spectra were nearly double-Gaussian in shape, and the efficiency for luminescence was nearly independent of the wavelength of the exciting …
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Absorption and Luminescent Excitation Spectra of F-Center and M-Center in Potassium-Chloride and Sodium-Fluoride
Made available in DSpace on 2015-05-12T21:41:37Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6706562.PDF: 4696028 bytes, checksum: 8bf1ffcf53c27547cfb46b8178f6816b (MD5) Previous issue date: 1966
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Light Scattering Studies of Heavy Fermion and High T(c) Superconductors
… techniques are used to probe the diverse excitation spectra of heavy fermion and high T$\sb{\rm c}$ superconductors.
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Evolution of the excitation spectrum of cuprate superconductors with doping and temperature
… the scanning tunneling microscope to measure the excitation spectra in the cuprates on the atomic scale as a function of doping and temperature. In this thesis, we will describe these techniques as well as a series of new experiments that reveal a surprisingly simple picture of how …
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System Design, Construction, Implementation, and Validation For Rapid Single-Cell Classification Using Imaging Multivariate Optical Computing
… single-cell phytoplankton cells in situ. Excitation spectra are collected using a single-cell optical trapping instrument built in house. Linear discriminant analysis (LDA) has been used to classify individual phytoplankton cells based on the fluorescence excitation spectra for individual …
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Laser-Induced Fluorescence Studies of Molecular Dynamics
The vibronic rovibronic fluoresence excitation spectra of biacetyl, methylglyoxal, and pentanedione have been recorded for the excited singlet state of each molecule. In particular, the fluorescence of biacetyl in a molecular beam has been shown to exhibit the quantum beat effect in the …
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Photoassociative excitation spectroscopy of excimer molecules
Laser excitation spectroscopy of transitions having dissociative ground states was explored as a tool for the study of excimer molecules. Since the repulsive nature of the ground state constrains collision pairs to large internuclear transitions, bound $\gets$ free excitation spectra contain more …
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High-resolution spectroscopic investigations of rovibrational state mixing in ground electronic states
… Parametric Oscillator to obtain fluorescence excitation spectra and dispersed fluorescence spectra of single molecular eigenstates.
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Correlation in the One Dimensional Electron Gas
… velocities determined from the long wavelength excitation spectra are also in good agreement with the experimental findings. We argue that correlation effects play an important role at the onset of the localization transition.
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Synthesis, structure and spectroscopic investigations of luminescent heterobimetallic gold(I)-Rhodium(I) species
… crystallographically characterized. Absorption spectra at room temperature, excitation spectra, emission spectra, and phosphorescence lifetimes of glass-solution and solid state samples at 77 K are reported for 2-5 and interpreted in context of crystallographic structure, electronic structure, …
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Single-degree-of-freedom energy harvesters by stochastic excitation
… oscillators under stochastic excitation are developed. For each family of oscillators, these objective criteria take into account the maximum possible energy harvested for a given response level, which is a quantity that is directly connected to the size of the harvesting …
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Nonlinear Luminescence Quenching in Eu2O3
… quenching occurs under conditions of high excitation density from interactions between excited centers, the result is an additional nonradiative decay pathway that lowers luminescence quantum efficiency. During investigations into the spectra and dynamics of Eu2O3, an apparent saturation …
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Quantum Beat Spectroscopy and Radiationless Transitions
Laser induced fluorescence excitation spectra of the series glyoxal-h(,2), methylglyoxal-h(,4), methylglyoxal-d(,4), biacetyl-h(,6), and 2,3-pentanedione-h(,8) at high resolution show that except for glyoxal these molecules undergo a characteristic structural deformation during the electronic …
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Joint Density-Functional Theory For Energetics And Spectroscopy In Complex Aqueous And Nonaqueous Solvents
… as well as new methods for calculating electron excitation spectra in such systems. These theories are then applied to a range of physical problems, from dendrite formation in lithium-metal batteries to the optical spectra of solvated ions.
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On the topological properties of the vibrations of solids
… the band structures of electrons and vibrational spectra of nuclei for topological analysis. Two concepts are introduced to investigate the non-trivial band crossing in the vibrational spectra. Depending the number of phonon bands and the intrinsic crystalline symmetry, the topological invariant …
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Effective action approach to quantum phase transitions in bosonic lattices
… derived and analyzed in detail. Additionally, excitation spectra in the ordered phase are found by considering both longitudinal and transverse variations of the order parameter. Finally, these results are applied to the concrete case of the Bose-Hubbard Hamiltonian on a three dimensional cubic …
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Spectroscopy and Photochemistry of Europium atoms in low temperature solids - an experimental and theoretical study
… transitions of atomic Eu. The absorption spectra are complicated showing numerous features due to multiple guest site occupancy in the host lattices upon deposition. Annealing simplifies spectra, removing one thermally unstable site of isolation in each RG. Site-specific excitation spectra …
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Optical and core-level X-ray spectroscopy of correlated two-dimensional materials
… rich landscape of ordered phases and associated excitations for potential applications in nanoelectronics. The coupling between distinct degrees of freedom in correlated materials provide routes to realize novel functional properties, which can be further manipulated by the high tunability …
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Intrinsically Localized Lattice Vibrations in Crystalline Lattices
… two-phonon critical energy. We conclude that the excitation spectra of the pairs of harmonic phonon excitations become energetically degenerate past the threshold ▁q value towards L at the invariant vector ▁k, announcing the strong presence of ILMs. The calculated ILMs were observed at critical …
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