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Discharge excitation of the XeF C to A transition

Description: Recent success in high efficiency and high energy laser extraction of tunable radiation in the blue-green C-A transition of XeF under intense, short-pulse electron beam excitation has renewed interest in the possibility of similar performance in avalanche discharges. We present preliminary results of discharge excited fluorescence studies in a variety of devices having different degrees of energy loading.
Date: January 1, 1987
Creator: Sze, R. C.; Greene, D. P.; Bigio, I. J.; Shay, T. M.; McCown, A. W.; Figueira, J. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Antenna organization in green photosynthetic bacteria

Description: This project is concerned with the structure and function of the unique antenna system found in the green photosynthetic bacteria. The antenna system in these organisms is contained within a vesicle known as a chlorosome, which is attached to the cytoplasmic side of the cell membrane. Additional antenna pigments and reaction centers are contained in integral membrane proteins. Energy absorbed by the bacteriochlorophyll c (BChl c) pigments in the chlorosome is transferred via a baseplate'' array… more
Date: January 1, 1987
Creator: Blankenship, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluating and testing thermographic phosphors for turbine-engine temperature measurements

Description: A technique developed earlier for measuring the temperature of inaccessible surfaces in low-temperature rotating machines is being adapted to measure the temperature of surfaces at the higher temperatures and in the erosive environment inside operating turbine engines. The method uses the temperature dependence of the characteristic decay time of the laser-induced-fluorescence of thermographic phosphors to measure the temperature. This paper summarizes recent work in four areas: phosphor charac… more
Date: January 1, 1987
Creator: Noel, B. W.; Allison, S. W.; Beshears, D. L.; Cates, M. R.; Borella, H. M.; Franks, L. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Antenna organization in green photosynthetic bacteria

Description: This project is concerned with the structure and function of the unique antenna system found in the green photosynthetic bacteria. The antenna system in these organisms is contained within a vesicle known as a chlorosome, which is attached to the cytoplasmic side of the cell membrane. Additional antenna pigments and reaction centers are contained in integral membrane proteins. Energy absorbed by the bacteriochlorophyll c (BChl c) pigments in the chlorosome is transferred via a baseplate'' array… more
Date: January 1, 1987
Creator: Blankenship, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experiments in atomic and applied physics using synchrotron radiation

Description: A diverse program in atomic and applied physics using x rays produced at the X-26 beam line at the Brookhaven National Synchrotron Light Source is in progress. The atomic physics program studies the properties of multiply-ionized atoms using the x rays for photo-excitation and ionization of neutral atoms and ion beams. The applied physics program builds on the techniques and results of the atomic physics work to develop new analytical techniques for elemental and chemical characterization of ma… more
Date: January 1, 1987
Creator: Jones, K. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proceedings of the black liquor research program review fourth meeting held July 28--30, 1987

Description: Research programs, presented at the black liquor review meeting are described. Research topics include the following: Cooperative Program in Kraft Recovery; Black Liquor Physical Properties; Viscosity of Strong Black Liquor; Ultrafiltration of Kraft Black Liquor; Molecular Weight Distribution of Kraft Lignin; Black Liquor Droplet Formation Project; Fundamental Studies of Black Liquor Combustion; Black Liquor Combustion Sensors; Flash X-ray Imagining of Black Liquor Sprays; Laser Induced Fluores… more
Date: October 1, 1987
Creator: Emerson, D. B. & Whitworth, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy transfer processes in solar energy conversion

Description: This program involves the experimental and theoretical study of optically induced electron transfer and electronic excitation transport in systems with complex structures. The focus is to obtain an understanding of the intimate interplay among intermolecular interactions, structure, and dynamics. A combination of picosecond transient grating experiments, time resolved fluorescence depolarization experiments, conventional optical spectroscopy, and statistical mechanical theory is being employed … more
Date: January 1, 1987
Creator: Fayer, M.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical sensors

Description: The revolution in analytical chemistry promised by recent developments in the field of chemical sensors has potential for significant positive impact on both research and production activities conducted by and for the Department of Energy. Analyses which were, in the past, performed only with a roomful of expensive equipment can now be performed with miniature solid-state electronic devices or small optical probes. Progress in the development of chemical sensors has been rapid, and the field is… more
Date: May 1, 1987
Creator: Hubbard, C. W. & Gordon, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Luminescence from irradiated solids, and radiation from immersed oscillating dipoles

Description: We have solved Maxwell's equations for a source, consisting of an oscillating dipole, located in a plane-bounded dielectric half-space. Formulae are given for the radiation yield from this source in the region outside the dielectric. The medium is characterized by a local, complex dielectric function epsilon(..omega..) = epsilon/sub 1/(..omega..) + iepsilon/sub 2/(..omega..). The application of these formulae to the analysis of experimental data on luminescence from solids is discussed. Calcula… more
Date: January 1, 1987
Creator: Crawford, O.H. & Ritchie, R.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theoretical atomic and molecular photophysics

Description: We report the results of a theoretical study of long-path stimulated Raman scattering and amplified spontaneous emission in an idealized atomic absorber, under coherent transient conditions and allowing for collisional and Doppler broadening effects.
Date: August 1, 1987
Creator: Eberly, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rock Matrix and Fracture Analysis of Flow in Western Tight Gas Sands: 1986 Annual Report

Description: This report presents progress for the second year of a five-year project concerned with the pore structure and flow properties of low permeability gas sands. The main objective of work during the first year was to carry out advanced core analysis on cores recovered from the Multi-Well Field Experiment. In Phase 2, the properties of both fractured and non-fractured samples (hereafter referred to as matrix) have been studied. Special attention was given to the combined effect of overburden pressu… more
Date: February 1, 1987
Creator: Morrow, Norman R.; Buckley, J.S.; Cather, S.M.; Brower, K.R.; Dandge, V.; Graham, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Luminescence from self-trapped holes in manganese-doped calcium fluoride single crystals

Description: Thermally stimulated luminescence (TSL) and electron spin resonance (ESR) measurements on x-irradiated CaF/sub 2/:Mn (0.1 wt %) single crystals have been conducted in the interval 70 to 300 K. Prominent TSL peaks occur near 150 K (345- and 495-nm emission) and 200 K (predominantly 495-nm emission) with thermal decay of ESR centers at these same temperatures. Taken collectively the data suggest that 150 K TSL emission is due to mobile holes from V/sub K/ centers recombining with both trapped ele… more
Date: January 1, 1987
Creator: Jahan, M. S.; Cooke, D. W. & Alexander, C., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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