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Showing 1 to 8 of 8 for “"Cavity Ringdown Spectroscopy"”.
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Cavity Ringdown Spectroscopy in Nitrogen/Oxygen Mixtures in the Presence of Alpha Radiation
… for radiation-induced atmospheric effects. Cavity Ringdown Spectroscopy (CRDS) was used to measure the concentration of chemical products generated as a result of radiation interactions in a controlled atmosphere. Experiments were conducted in a vacuum chamber interfaced with a gas …
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High-resolution spectroscopic studies of carbon-containing species
… fundamental side, high-resolution rovibrational spectroscopy allows molecular constants to be determined and provides evidence of theoretical assumptions. Work to this end was performed using cavity-ringdown spectroscopy and either a gas phase or supercritical fluid supersonic expansion source. …
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A System for Measuring Radiation Induced Chemical Products in Atmospheric Gases Using Optical Detection Methods
… This project explored the potential for using Cavity Ringdown Spectroscopy to evaluate the presence of chemical products generated by the air-radiation interaction near an alpha radiation source. In particular, measurements of ozone concentration within a controlled atmosphere chamber as …
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Application of sensitive spectroscopic techniques to intramolecular dynamics and combustion kinetics
Modifications of Cavity Ringdown Spectroscopy (CRD) for use in the UV region are discussed. These modifications partially overcome the low sensitivity of CRD in the UV (due to lower mirror reflectivity, R - 0.99) by removal of non-exponential contributions to the ringdown decay. We have also …
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A System For Conducting Laser-Induced Fluorescence Measurements On Gas Mixtures Exposed To Alpha Radiation
… system to allow laser-induced fluorescence spectroscopy measurements within simulated atmospheres under a variety of conditions. This added capability will expand the laboratory’s ability to experimentally validate a computational model that calculates the effects of radiation within the …
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Development of a quantum cascade laser based spectrometer for high-resolution spectroscopy of gas phase C60
… cascade laser (QCL) based continuous-wave cavity ringdown spectrometer (cw-CRDS) coupled to an oven supersonic expansion source. This is the first such work that uses a QCL in conjunction with the cw-CRD technique and a supersonic expansion source. The primary goal of the research is to …
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Laser-induced plasmas in air for pulsed broadband cavity-enhanced absorption spectroscopy
… inside a high-finesse near-concentric optical cavity. The broadband optical plasma emission was successfully sustained within the cavity and the light leaking from the cavity was used to measure broadband absorption spectra of gaseous azulene through (i) time-dependent cavity ring-down (CRDS), …