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Showing 1 to 20 of 25 for “"oscillator strength"”.

  1. Oscillator strength measurements in singly-ionized, doubly-ionized and neutral lanthanides and transition elements (sm, nd, pr, gd, cu, and fe) using laser-induced breakdown spectroscopy.

    Ryder, Caleb2013

    … to calculate transition probabiliites and oscillator strengths.</p> <p>In two transition metals, emission intensities have been measured for 192 transitions from 108 excited states in neutral copper and 27 emission lines from 108 excited states in singly-ionized copper as well as 776 …

    wayne-thes Repository record

  2. Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact

    Travia, AndersonEast Carolina University2009

    … the double cross section into the generalized oscillator strength and kinematic factors. The generalized oscillator strength or Bethe surface of the medium is obtained by using a semi-empirical optical oscillator strength distribution published in the literature and an extension algorithm based …

    ecu Repository record

  3. Absolute molecular electronic spectroscopy at UV and soft X-Ray energies by hihg-energy electron impact

    Burton, Gordon R.University of British Columbia1993

    … 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 (Cl 2p,2s; C is …

    ubc Repository record

  4. Photoionization and Photofragmentation of the Endohedral Xe@C60+ Molecular Ion

    Aryal, Nagendra B.2013

    … and evidence of redistribution of the Xe 4d oscillator strength in photon energy due to multipath interference is reported. Experiments were conducted at undulator beamline 10.0.1 of the Advanced Light Source (ALS) using the merged-beams technique. Prior to these measurements, macroscopic …

    unr Repository record

  5. Optical properties of gallium arsenide and indium gallium arsenide quantum wells and their applications to optoelectronic devices

    Huang, DamingUniversity of Illinois at Urbana-Champaign2011

    … dominant mechanism responsible for the change of oscillator strength and binding energy of excitons associated with partially filled subband. On the other hand, the screening and exchange interaction are equally important to excitons associated with empty subbands. For InGaAs/GaAs strained-layer …

    uiuc Repository record

  6. ΦΑΣΜΑΤΟΣΚΟΠΙΑ ΔΙΕΓΕΡΜΕΝΩΝ ΗΛΕΚΤΡΟΝΙΑΚΩΝ ΚΑΤΑΣΤΑΣΕΩΝ ΤΩΝ ΠΙΚΟΛΙΝΩΝ

    Kosmidis, Constantine, Κοσμίδης, ΚωνσταντίνοςUniversity of Ioannina1989

    … WEMEASURED THE EXTINCTION COEFFICIENT AND THE OSCILLATOR STRENGTH FOR THE DIFFERENT MOLECULAR TRANSITIONS. WE MADE ALSO AN ANALYSIS OF THEIR VIBRATIONAL STRUCTURE AND WE COMPARED THEM WITH THE SPECTRA OF BENZENE, TOLUENE AND PYRIDINE. FROM THE LINE INTENSITY VARIATION OF THE RAMAN SPECTRA …

    greece Repository record

  7. Engineering J-aggregate cavity exciton-polariton devices

    Bradley, Michael ScottMassachusetts Institute of Technology2009

    … thanks to their narrow linewidth and high oscillator strength at room temperature, properties resulting from delocalization of excitations across multiple strongly-coupled molecules. By placing these films in an optical microcavity, the aggregates exhibit additional strong-coupling to the …

    mit Repository record

  8. Solid state cavity QED : practical applications of strong coupling of light and matter

    Tischler, Jonathan Randall, 1977-Massachusetts Institute of Technology2007

    … cooperative optical transition possessing oscillator strength derived from all of the aggregated monomers that is capable of interacting strongly with the cavity confined electromagnetic field even at room temperature. There are different materials and methods for assembling J-aggregates …

    mit Repository record

  9. Photoionization of the Cerium Isonuclear Sequence and Cerium Endohedral Fullerene

    Habibi, Mustapha2009

    … of the ion. A strong contribution to the total oscillator strength was observed in the double and triple photoionization channels for low charge states ( Ce$^{+}$, Ce$^{2+}$, and Ce$^{3+}$), whereas most of the 4d excitations of the higher charge states decay by ejection of one electron.

    unr Repository record

  10. Kinetic processes in a high pressure laser generated plasma

    Krebs, Danny JoeUniversity of Missouri--Rolla2016

    … of ionization obtained is a function of the oscillator strength of the transition at the laser wavelength. When such a scan is taken simultaneously in a cell with no buffer gas and one with a high pressure of buffer atoms, the collisional line shift due to the buffer atoms is measured. A …

    must-thes Repository record

  11. Optical Properties of Organic Semiconductors: from Submonolayers to Crystalline Films

    Nitsche, RobertTechnische Universität Dresden

    … the films, interactions with the substrates and oscillator strength. A direct observation of a monomer-dimer transition in solid films could be observed for the first time. Our results indicate an exciton delocalization over about 4 molecules for both molecules.

    qucosa-diss

  12. Monte Carlo studies of ground-state & optical properties of multiexcitonic complexes in semiconductors

    Cancio, Antonio Christopher2012

    … few-particle systems. The binding energy and oscillator strength for radiative recombination are calculated and compared with those of other theories, and with experimental binding energy and lifetime data from various direct-gap semiconductors. We then study the ground-state properties of …

    uiuc Repository record

  13. Towards room-temperature Terahertz Quantum Cascade Lasers : directions and design

    Chan, Chun Wang IvanMassachusetts Institute of Technology2015

    … limited by a fundamental trade-off between gain oscillator strength ful and upper-level lifetime [Tau]. This so-called "ful[Tau] tradeoff" is shown to explain the failure of designs which target [Tau] alone. A solution is proposed in the form of highly diagonal (low ful) active region design …

    mit Repository record

  14. Spectroscopic studies of alkali and zinc core levels in alkali metals

    Chiu, Tien-Heng2011

    … takes place because the distribution of oscillator strength is changed when the 4p level mixes into the conduction band.

    uiuc Repository record

  15. Electromagnetic radiation calorimetry of thermoplastics, elastomers and composites systems

    Chen, MingVirginia Polytechnic Institute and State University1989

    … of (ε<sub>S</sub> - ε<sub>∞</sub>), the oscillator strength. The value of (ε<sub>S</sub> - ε<sub>∞</sub>) should be used together with the distribution of relaxation times and the activation energies of dipolar dispersion to predict heatability for microwave processing. The critical …

    vt Repository record

  16. Liquid crystals for light emitting diodes

    Liedtke, AliciaUniversity of Hull2009

    … Compared to the monomer a doubling of the oscillator strength in the dimer was found for longitudinal offsets larger than 20 A. Smaller shifts showed a forbidden absorption transition from ground to the lowest excited state. Assuming that the absorption transition is equivalent to the …

    hull Repository record

  17. Mueller matrix spectroscopic ellipsometry of multiferroics

    Basistyy, Roman

    … dependencies of their frequency, damping, and oscillator strength. For all studies, oxide materials' clear signatures of the spin-phonon interaction are found below the temperature of the antiferromagnetic phase transition T_N due to magnetic ordering of Mn^{3+} spins. A decrease of the ionic …

    njit Repository record

  18. Absorption and luminescent excitation spectra of F and M centers in Kcl and NaF

    Boettler, James Leroy2011

    … of the Ml to M2 transitions was 1.2 ± .25. The oscillator strengths of 3 of the M-center transitions in KCl relative to the oscillator strength for the F center were found to be in better agreement with the results reported by Okamoto, than with the results reported by Delbecq. The polarization …

    uiuc Repository record

  19. Spectroscopic Study of Triplet Exciton Dynamics at the Hybrid Organic-Inorganic Interface

    Allardice, JesseUniversity of Cambridge2020

    … spin forbidden, and have a correspondingly weak oscillator strength. In this thesis, we investigate a promising method to overcome this impasse, using inorganic quantum dots (QDs) to efficiently convert between triplet excitons and photons. We develop a variety of novel hybrid organic-inorganic …

    cambridge Repository record

  20. An Exploration of Theoretical Spectra

    Koulias, Lauren N2023

    … energies for this low energy region, the oscillator strength of each excitation is calculated. This enables the simulation of absorption spectra, the observation of which excited states are populated, and the comparison of other general spectral features in the low energy UV-Visible region …

    washington Repository record

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