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Parameters Influencing Electromagnetically Induced Transparency
Get PDFThis thesis investigates the parameters of achieving electromagnetically induced transparency, or EIT. The technique of EIT manipulates the properties of atoms to partially cancel the usual absorption of laser light. In this experiment, the effect was observed using the D1 line of rubidium vapor and a Λ -configuration between the degenerate magnetic sublevels of the 5S1/2(F=1) and 5P1/2(F=1) hyperfine states. Among the parameters investigated were the linear and circular polarization of the light used to drive the transitions, the size of the laser beam used, the effects of the temperature of the rubidium interaction cell on EIT, the density of the rubidium atoms in the interaction cell, and the effects of changing the power of the fields used to drive the transitions. Careful measurements of these parameters were made
The Localization Mechanism of Telomerase in \u3cem\u3eAspergillus nidulans\u3c/em\u3e
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Gothic Ecclesiastical Architecture of Northern France: Where Art Meets Economics
Get PDFGothic cathedrals were financed in many ways and their building could take centuries to complete. The process was long and arduous costing enormous sums of money over a sustained period of time. Their construction depleted both capital and skilled labor from the surrounding areas spurring both the donors and workers to be represented in the cathedral. The materials used to build these massive structures drew greatly on the region and dictated their architectural form. When the donors, religious figures, aristocracy, and workers are represented it validates the sacrifices they made towards building the cathedral as well as showing their social and economic standing in society to the viewer
Ionothermal Syntheses, Characterization, and Preliminary Thermal Properties of Three New Iron Thiophosphates
Get PDFIonic liquids, as green and renewable solvents, have been widely used in the chemistry of the pharmaceutical, energy, and surfactant industries. In this project, they are used to understand the full range of synthetic parameters that produce recently discovered iron compounds. Phosphorous heavy ratios in [EMIM][CF3SO3] (EMIM = 1-ethyl-3-methylimidazolium) seem to favor formation of the [FeP7S17]–anion. Other ratios push the reaction in favor of the [Fe(P2S8)2]2- anion. When a different ionic liquid, [EMIM][BF4], was used, a new iron complex was isolated: [Fe(P3S8)2]3-. The crystal structure of this new iron compound, [EMIM]3[Fe(P3S8)2], and its infrared spectrum are presented. Some thermal properties from differential scanning calorimetry (DSC) for the [EMIM]3[Fe(P3S8)2], [EMIM]2[Fe(P2S8)2], and [EMIM][FeP7S17] compounds are also discussed