Targets of CO₂ in a differentially-pumped chamber at a pressure of 40 mTorr were bombarded by particles of H₃⁺ at energy of 1 MeV. The optical spectrum created in the collisions was analyzed with a 1-meter, air Czerny-Turner spectrometer. The spectrum excited in the collisions is dominated by molecular bands in the wavelength range from 300 nm to 900 nm. However, one also sees weak atomic lines from C I, C II, O I and O II. The excitation process gives rise to relatively weak atomic spectra in the visible region compared to similar studies of O₂. This paper reports on the carbon dioxide spectra and compares the relative intensities and the line widths of various features with similar studies of oxygen.

Source: Dissertation Abstracts International, Volume: 35-12, Section: B, page: 6024. / Thesis (Ph.D.)--The Florida State University, 1974.

Source: Dissertation Abstracts International, Volume: 35-02, Section: B, page: 0973. / Thesis (Ph.D.)--The Florida State University, 1973.

Source: Dissertation Abstracts International, Volume: 36-08, Section: B, page: 4031. / Thesis (Ph.D.)--The Florida State University, 1975.

Source: Dissertation Abstracts International, Volume: 33-02, Section: B, page: 0849. / Thesis (Ph.D.)--The Florida State University, 1972.

Source: Dissertation Abstracts International, Volume: 31-05, Section: B, page: 2886. / Thesis (Ph.D.)--The Florida State University, 1970.

This dissertation reports on the experimental study of coherent wavepacket dynamics of cesium atoms in the double-well potentials of a one-dimensional, far-off-resonance optical lattice. An optical lattice is the periodic potential produced by the light shift interaction of an atom with the light field of interfering laser beams. With the proper choice of laser parameters and external magnetic fields, an array of double-well potentials is created. Using the techniques of laser cooling, atoms are trapped in the lattice and are prepared in a pure state through a combination of enhanced laser cooling in a near-resonance lattice and state selection in an accelerated far-off-resonance lattice. The atoms are prepared on one side of the double-well potential, and the atomic wavepackets will then oscillate between the left and right localized states of the double-well potential. Entanglement between the internal and external degrees of freedom makes it possible to follow the center-of-mass motion of the atoms by measuring the ground state magnetic populations via Stern-Gerlach analysis. The coherent dynamics of these wavepackets was studied under various combinations of lattice parameters such as lattice depth, applied transverse and longitudinal magnetic fields. There is excellent agreement between the experimentally measured oscillation frequencies and those predicted from a numerical analysis of the bandstructure of the lattice. For certain lattice parameters the total energy of the atom is below the potential barrier and the coherent motion corresponds to tunneling through a classically forbidden barrier. At specific times during the oscillation the atomic wavepacket corresponds to a coherent superposition of the mesoscopically distinct left and right localized states.

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Abstract Not Available.

Abstract Not Available.