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 12 of 12 for “"Excited Atoms"”.
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Experimental investigation of the interaction between the electron gas and the excited atoms in a plasma by means of a xenon laser
… the interaction between the electron gas and the atoms in excited states has been undertaken for a gas discharge situated in a high gain optical cavity. Of particular interest is the effect of lasering upon this interacti.on. Spatially resolved electron density and electron temperature …
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Quantum dynamics of ultracold atoms in inhomogeneous magnetic fields : from ground state atoms to Rydberg atoms
… of the quantum dynamics of ultracold atoms in the presence of external inhomogeneous magnetic fields. We discuss the behavior of ground state atoms inside typical magnetic field configurations. Such atoms can be approximately treated as neutral point-like particles which carry a …
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Resonant Dipole-Dipole Energy Transfer Dynamics in a Frozen Rydberg Gas
… interaction strongly couples ultracold highly excited atoms, known as Rydberg atoms, and is the dominant mechanism for energy exchange among such atoms on microsecond time scales. I present the results of experiments that investigate this interaction using rubidium atoms excited to Rydberg …
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The design and fabrication of an electrically activated photonic crystal microcavity laser
… by reducing the dimensions of a cavity, excited atoms immersed in the cavity are more likely to spontaneously emit photons into the dominant cavity mode than spurious modes. Microcavity lasers exploit this stronger coupling by confining photons to a cavity with outer dimensions …
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Kinetic processes in a high pressure laser generated plasma
… noble buffer has been simultaneously excited by short (4 ns) laser pulses from two lasers: ii the first tuned to one of the 'D' line transitions and the second tuned to either the photoionization threshold of the 3p states near 406 nm or to a higher level 3p-nd resonance. The …
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Chaos and Localisation
… of quantum chaos theory. These are highly excited hydrogen atoms subject to a microwave field, and kicked atoms which mimic the delta-kicked rotor model. Both of these systems show a complex dynamical evolution arising from the interaction with an external time-periodic driving force. In …
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Two-photon spectra of Rydberg states of alkaline-earth atoms (strontium and barium)
… due to strong perturbation by several doubly excited configurations and this also increases discrepancies between theory and experiment in accurate level assignment and energy level and atomic structure data, particularly for the spectra of highly excited atoms and their behaviour in external …