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.
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Showing 1 to 15 of 15 for “"Quantum defect"”.
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Generalized quantum defect methods in quantum chemistry
The reaction matrix of multichannel quantum defect theory, K, gives a complete picture of the electronic structure and the electron - nuclear dynamics for a molecule. The reaction matrix can be used to examine both bound states and free electron scattering properties of molecular systems, which are …
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Rydberg series of calcium monofluoride : spectrum, structure, and dynamics
… and dynamical model for the CaF molecule. The quantum defects of the Rydberg series of the molecule, as well as their dependences on the internuclear distance and the collision energy of the outer electron, are determined through a quantum defect theory fit of an extensive data set that …
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Excitation Spectroscopy of Krypton Molecular Rydberg States
… (LESSTHEQ) 18) transitions. The series limit and quantum defect, (delta), for the np('3)(PI)(,g) series have been determined to be 28471.9 (+OR-) 3.9 cm('-1) (351.12 (+OR-) 0.05 nm) and 2.629 (+OR-) 0.004, respectively. The vibrational frequency, (omega)(,e), of the 5s('3)(SIGMA)(,u)('+) excimer …
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Novel power scaling architectures for fibre and solid-state sources
… second cavity condition discussed was for low quantum defect operation, which was demonstrated at 1970nm corresponding to a quantum defect of just 2%. Lastly, further power scaling and other applications for all three approaches are discussed<br/>
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FLUORESCENT ULTRASHORT NANOTUBES FROM DEFECT-INDUCED CHEMICAL CUTTING
… based on a fundamental new understanding of defect-induced chemical cutting of SWCNTs. The method includes implanting fluorescent quantum defects onto the carbon nanotubes, and then cutting the nanotubes preferentially from the defect sites. Firstly, I demonstrate that this simple two-step …
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Photoionization of Se Ions for the Determination of Elemental Abundances in Astrophysical Nebulae
… series of resonances are identified using quantum defect theory and the experimental results are compared to theoretical photoionization cross section calculations using fully relativistic Dirac Atomic R-matrix Code (DARC). These results are also used to improve the accuracy of the National …
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Photoionization of the Cerium Isonuclear Sequence and Cerium Endohedral Fullerene
… autoionizing excitations were assigned using the quantum defect theory for the Ce$^{3+}$ photoionization cross section. The experimental data show the collapse of the nf wavefunctions (n $\geq$ 4) with increasing ionization stage as outer-shell electrons are stripped from the parent ion. The nf …
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Ultracold Molecules: The Effect of Electromagnetic Fields
… of He($^1S$)+SO($^3\Sigma^-$). Through detailed quantum scattering calculations, it is then shown that the sympathetic cooling of NH($^3\Sigma^-$) molecules with Mg atoms has a good prospect of success, a first for a neutral molecular system. Detailed quantum scattering calculations are performed …
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Construction and calibration of a custom time-of-flight mass spectrometer and its use in measuring the reaction kinetics of transition metal ion-organic interactions.
… lowest ionization threshold with an apparent quantum defect of 0.92. The state which couples the ground state of copper to the Rydberg series is a non-stationary state composed primarily of the spin-orbit components of the lowest 2P° atomic states. Additionally, the time dependence of the …
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Two micron Tm doped ZBLAN double clad fibre laser.
… pumps the emitting laser level, reducing the quantum defect between the pump and lasing wavelengths, reducing the threshold and increasing the efficiency of the fibre laser. Tm:ZBLAN fibres fabricated in-house, we also characterized with the aim of processing towards the development of new …
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A variational framework for multi-scale defect modeling in strained electronics and processing of composite materials
… technologies that may lead to the formation of defects within the material parts at critical location during processing. This dissertation presents a deterministic defect modeling framework based on a system of variationally consistent formulations that allow for the modeling of the material …
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Quantum magnetic imaging for DNA biophysical measurements
… probe moment direction. The NV center is a quantum defect whose electron spin has long spin coherence times, spin-coupled optical transitions and is photostable, allowing for optical probing of the ground state spin transitions, which couple strongly to external fields including magnetic …
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NV diamond project for nEDM
… the research conducted on Nitrogen Vacancy (NV) defects in diamonds for the nEDM experiment which has an operating temperature of 0.5 K. NV defects have been investigated as metrological sensors for measuring both, electric and magnetic fields at room temperature and also at 4 K. This thesis …
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ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΜΕΛΕΤΗ ΤΩΝ ΔΙΑΤΑΡΑΧΩΝ ΤΩΝ ΑΡΤΙΑΣ ΟΜΟΤΙΜΙΑΣ ΑΥΤΟΙΟΝΙΖΟΜΕΝΩΝ ΚΑΤΑΣΤΑΣΕΩΝ ΤΟΥ ΣΤΡΟΝΤΙΟΥ ΜΕ ΔΙΑΤΑΞΗ 4DUL (L=S,D,G) ΚΑΙ ΣΤΡΟΦΟΡΜΗ J=0,...
ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΔΥΟ ΓΡΑΜΜΙΚΑ ΠΟΛΩΜΕΝΩΝ ΑΚΤΙΝΟΒΟΛΙΩΝ LASER ΜΕΛΕΤΗΘΗΚΕ ΤΟ ΑΡΤΙΑΣΟΜΟΤΙΜΙΑΣ J=ΟΕ,1Ε,2Ε ΑΥΤΟΙΟΝΙΖΟΜΕΝΟ ΦΑΣΜΑ ΤΟΥ ΣΤΡΟΝΤΙΟΥ ΚΑΤΩ ΑΠΟ ΤΟ 4D5/2 ΚΑΤΩΦΛΙ ΙΟΝΙΣΜΟΥ. ΜΕΣΩ ΕΝΟΣ ΣΧΗΜΑΤΟΣ ΔΙΕΓΕΡΣΗΣ ΔΥΟ ΒΗΜΑΤΩΝ, ΜΕ ΤΗΝ 4D5P 1Ρ1 ΣΑΝ ΕΝΔΙΑΜΕΣΗ ΚΑΤΑΣΤΑΣΗ, ΗΤΑΝ ΔΥΝΑΤΗ Η ΕΠΙΛΕΚΤΙΚΗ ΔΙΕΓΕΡΣΗ ΤΩΝ …