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 9 of 9 for “"pressure broadening"”.
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Application of pressure broadening theory to atmospheric microwave absorption.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1976
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Pressure broadening of infrared absorption lines at moderate densities.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1976
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SHEDDING NEW LIGHT ON OLD DATA: FINDING NEW RESULTS FOR EXOPLANET SCIENCE IN ARCHIVAL DATA
… in the modelling of exoplanet atmospheres due to pressure broadening. Pressure broadening, where collisions between molecules in atmospheres cause a Lorentzian broadening of molecular transitional lines, is little understood in the field. In this chapter I consider its effects on real exoplanet …
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High pressure surface enhanced Raman scattering spectroscopy
… monolayers and single molecules under high pressure. Vibrational spectra up to 8 GPa were obtained for self-assembled monolayers (SAMs) of the energetic material simulant 4-nitrobenzenethiol (NBT). A large pressure-broadening NO2 symmetrical stretch was found in the SAMs but not in solid …
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Advanced optical calibration of the Herschel HIFI heterodyne spectrometer
… a radiative transfer model with the measured pressure and optical path length of the gas cell and molecular line parameters taken from the JPL and HITRAN catalogs, model spectra can be generated. By comparing the generated spectra with the observed spectra the side band gain can be determined. …
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Mobility and fluorescence of barium ions in xenon gas for the EXO experiment
… time. The variation of mobility with xenon gas pressure suggests that a significant fraction of molecular ions are formed when barium ions interact with xenon gas at high pressures. The measured mobility of Ba+ in Xe gas at different pressures is compared with the predicted theoretical value, …
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Investigating Palaeoatmospheric Composition-Climate Interactions
… However, this is offset by an increase in the pressure broadening of greenhouse gas absorption lines. Dynamical feedbacks also lead to increased meridional heat transport, warming polar regions and cooling tropical regions. An increase in oxygen content using the HadCM3-BL and HadGEM3-AO …
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Molecular Spectroscopy: A Study of Molecules in Earth and Planetary Atmospheres
… Torr, 150 Torr, 240 Torr, 320 Torr, and 400 Torr pressure of added hydrogen. The spectra were recorded using a high resolution Fourier transform spectrometer. The CH<sub>4</sub> spectra were measured at 5 different temperatures from room temperature up to ~1100 K. A multi-spectrum non-linear …
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A sensor for combustion thermometry based on blue diode lasers.
… seeded at trace quantities into atmospheric pressure flames. In both cases, the spectra obtained show excellent agreement with a theoretical fit based on the individual hyperfine components of the transition. The two ECDLs have been used to build a sensor for the measurement of temperature in …