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Photogenerated carrier-induced reactions on uhv semiconductor surfaces

Description: The objective for this experimental work was to examine the reaction mechanisms, half-collision dynamics, and other optically induced chemical effects, that are operable on a well characterized single-crystal semiconductor surface. Of particular interest were reactions induced by charge transfer from the semiconductor surface including hot carrier and thermalized carrier processes. The primary technique to measure the desorbed fragment translational energies was time-of-flight mass-spectroscopy… more
Date: May 28, 1992
Creator: Osgood, R.M. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calibration and performance of a secondary emission chamber as a beam intensity monitor

Description: We report on a study of the behavior of a secondary emission chamber (SEC). We show the dependence of the SEC signal on the charge and velocity of the primary beam for beams of protons, and heavy ions including Helium, Neon, Chlorine and Iron. We fill the SEC with a selection of different gases including Hydrogen, Helium, Nitrogen, Argon, and air, studying the SEC response when it is acting as an ion chamber. We also investigate the behavior of the SEC at intermediate pressures between 10{sup -… more
Date: March 28, 2011
Creator: Sivertz, M.; Chiang, I-H, & Rusek, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mercury Emission Measurement at a CFB Plant

Description: In response to pending regulation to control mercury emissions in the United States and Canada, several projects have been conducted to perform accurate mass balances at pulverized coal (pc)-fired utilities. Part of the mercury mass balance always includes total gaseous mercury as well as a determination of the speciation of the mercury emissions and a concentration bound to the particulate matter. This information then becomes useful in applying mercury control strategies, since the elemental … more
Date: February 28, 2009
Creator: Pavlish, John; Thompson, Jeffrey & Hamre, Lucinda
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wetlands for Industrial Wastewater Treatment at the Savannah River Site

Description: The A-01 effluent outfall, which collects both normal daily process flow and stormwater runoff from a industrial park area, did not meet the South Carolina Department of Health and Environmental Control (SCDHEC) National Pollutant Discharge Elimination System (NPDES) permit limits for metals, toxicity, and total residual chlorine at the outfall sampling point. Copper was the constituent of primary concern and the effluent consistently failed to meet that NPDES limit. Installation of a construct… more
Date: February 28, 2002
Creator: Gladden, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Co-firing high sulfur coal with refuse derived fuels. Technical progress report No. 10, January 1997--March 1997

Description: In previous progress reports, we reported our study on the proposed mechanism for the formation of chlorinated organics during combustion, in which molecular chlorine is thought to be the key starting material. The objective of this quarter of study was to quantitatively test the inhibiting effect of SO{sub 2} on the formation of Cl{sub 2} during the combustion of MSW. The experiments were conducted under conditions close to those employed in the AFBC system. The principle analytical technique … more
Date: February 28, 1997
Creator: Pan, Wei-Ping; Riley, J. T. & Lloyd, W. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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