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Luminescence process, refractory stabilities, and new novel electronic states: scanning chemical reactions and novel products for laser induced isotope separation. Progress report, December 1, 1975--July 15, 1976

Description: The formulation, development, and use of versatile oven systems for high temperature metal vaporization at temperatures in excess of 2000/sup 0/C are discussed. Refinements of an apparatus appropriate for the production and study of small metal aggregates M/sub n/(2 less than or equal to n less than or equal to 6) are discussed at length. Improvements in the argon ion and nitrogen pumped dye laser systems, and necessary additions for effective interfacing of these dye lasers to the aggregates a… more
Date: August 1, 1976
Creator: Gole, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Observation of the forbidden magnetic dipole transition 6/sup 2/P/sub 1/2/. -->. 7/sup 2/P/sub 1/2/ in atomic thallium. [Interference, M1 and E1 amplitudes, polarization, fluorescence, hyperfine structure]

Description: A measurement of the 6/sup 2/P/sub 1/2/ ..-->.. 7/sup 2/P/sub 1/2/ forbidden magnetic dipole matrix element in atomic thallium is described. A pulsed, linearly polarized dye laser tuned to the transition frequency is used to excite the thallium vapor from the 6/sup 2/P/sub 1/2/ ground state to the 7/sup 2/P/sub 1/2/ excited state. Interference between the magnetic dipole M1 amplitude and a static electric field induced E1 amplitude results in an atomic polarization of the 7/sup 2/P/sub 1/2/ sta… more
Date: October 1, 1976
Creator: Chu, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optical spectroscopy of /sup 237/Np in CaF/sub 2/. Final report

Description: An analysis was made of the optical absorption and fluorescence spectra of green-colored Np : CaF/sub 2/ specimens. The absorption spectra were attributed to Np/sup 3 +/(5f/sup 4/) substituents at Ca/sup 2/+ (000) sites with three distinct modes of charge compensation and correspondingly lowered local symmetries: (1) C/sub 3v/, associated with an F/sup -/ compensator at a (/sup 1///sub 2//sup 1///sub 2//sup 1///sub 2/)-type site, (2) C/sub 3v/, associated with the replacement of a nn F/sup -/ b… more
Date: January 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies of encapsulation materials for terrestrial photovoltaic arrays. Fifth quarterly progress report, September 16, 1976--December 15, 1976

Description: Present efforts in Study 3, entitled ''Evaluation of Test Methods and Properties of Candidate Encapsulation Materials,'' are concerned primarily with evaluation of the properties of candidate encapsulation materials and processes which have been identified. Specifically, cover materials for modules, and adhesives for bonding cells to cover materials and for bonding cover materials to other encapsulation-system components, are being screened in environments including UV radiation, temperature cy… more
Date: December 27, 1976
Creator: Carmichael, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Luminescence process, refractory stabilities, and new and novel electronic states: scanning chemical reactions and novel products for laser induced isotope separation. Progress report, December 1, 1975--November 20, 1976

Description: Oven systems for high temperature metal vaporization at temperatures in excess of 2000/sup 0/C are being developed. Modifications of an apparatus appropriate to the production and study of small metal aggregates M/sub n/ (2 less than or equal to n less than or equal to 6) are discussed, including the construction and operation of argon ion and nitrogen pumped dye laser systems. The dye laser system is being used to induce fluorescence from small metal aggregates. Components necessary for interf… more
Date: November 1, 1976
Creator: Gole, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electronic structure of the F center in the alkaline earth oxides

Description: The energy levels and wave functions of the ground and first few singlet and triplet excited states of the F center in MgO, CaO, and SrO were calculated as a function of the nearest neighbor ion positions. Configuration coordinate curves for A/sub 1g/, E/sub g/ and T/sub 2g/ displacements have been constructed and used to interpret the absorption and luminescence bands of the F center. The energy of the /sup 1/A/sub 1g/ ..-->.. /sup 1/T/sub 1u/ transition was set near the experimental value in … more
Date: August 1, 1976
Creator: Wilson, T. M. & Wood, R. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photochemistry and enzymology of photosynthesis. Annual progress report, May 1, 1975--April 30, 1976

Description: Work during the reporting period can be separated into four main topics. Highlights include oxygen evolution, proton transport, acid-base induced fluorescence changes, and mass spectrometer studies. Under some conditions we have observed the apparent transition of S/sub 1/ to S/sub 2/ in the dark. Redox titrations showed that this transition has a midpoint potential of 400 mV at pH 7, and a pH dependence of 60 mV per pH unit. The proton uptake and release that apparently accompany the reduction… more
Date: April 1, 1976
Creator: Kok, B.; Fowler, C. F.; Radmer, R. J. & Hardt, H. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theoretical modeling of the KrF fluorescence spectrum

Description: Dunning's amd Hay's electronic potential curves were used to compute transition moments and to predict emission profiles for comparison with the observed fluorescence spectra. By adjusting the ionic and valence states by 8 nm, many of the observed spectral features can be quantitatively accounted for. The synthetic spectrum of KrF includes the 220-nm D/sub /sup 1///sub 2// ..-->.. X transition, the 249-nm composite feature, and the 276-nm feature which is a superposition of the nearly coinciden… more
Date: September 10, 1976
Creator: Rescigno, T. N. & Winter, N. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Crystal growth and evaluation of mercuric iodide nuclear detectors, November 15, 1975--June 30, 1976

Description: A research effort on mercuric iodide (HgI{sub 2}) was initiated in November 1974 at the Hebrew University of Jerusalem to complement the crystal growth of HgI{sub 2} now being studied as part of the SANDS Program at EG&G, Inc. at Santa Barbara, California. The program was supposed to carry on some crystal growth experiments in a horizontal furnace which, although was considered promising, had to be abandoned at EG&G, where the experiments concentrated on crystal growth in a vertical furnace. In… more
Date: October 1, 1976
Creator: Schieber, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of stress on the fluorescence of Kevlar fiber. [With and without epoxy resin]

Description: A preliminary feasibility study was initiated to determine if laser-induced fluorescence might reveal molecular changes due to uniaxial stresses on Kevlar, an aromatic polyamide fiber. The fluorescence spectrum, with a peak at 490 nm (excited by 290 nm), did not shift with stress, but the fluorescence intensity generally increased with stress. The magnitude of the increase was attenuated by epoxy resin. Implications and applications of the results are discussed. (DLC)
Date: October 18, 1976
Creator: Richardson, J. H.; Haugen, G. R.; Penn, L. S.; Feikert, J. H. & Sherry, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Observation of coherent resonance fluorescence in hot CO/sub 2/

Description: Hot CO/sub 2/ was used to check theoretical understanding by using one-nanosecond pulses. The results reported are in relatively good agreement with theory. The experimental setup consisted of a one nanosecond duration 1/2 millijoule switched-out pulse directed through two heated pyrex cells filled with CO/sub 2/ and fitted with NaCl windows at Brewster's angle. The cells were 190 cm long of which 160 cm were heated to 300 +- 10/sup 0/C for a total heated path of 320 cm. Results are shown. They… more
Date: January 1, 1976
Creator: Czuchlewski, S. J.; Feldman, B. J.; Fisher, R. A. & Nowak, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ERDA Contract E(11-1)-3162 Annual Progress Report: 1975-1976

Description: Measurements of the quantum efficiencies of photochemistry and fluorescence, in photosynthetic reaction centers from Rhodopseudomonas sphaeroides, have been extended to low temperatures. Studies of linear dichroism in oriented fragments of photosynthetic membranes have revealed the orientations of bacteriochlorophyll and other pigments, both in the ''antenna'' and in the reaction centers. New measurements of absorbance changes associated with reduced components in reaction centers will hopefull… more
Date: Autumn 1976
Creator: Clayton, R. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Total luminescence contour spectra of six topped crude oils

Description: The results of a preliminary study of six topped crude oils by total luminescence are presented. Included are six contour spectra, six principal excitation/emission spectra, an interpretation of the contours by comparison with other data, a discussion of the method and recommendations for further related studies. These data are used in oil spill identification.
Date: November 1, 1976
Creator: Chisholm, B. R.; Eldering, H. G.; Giering, L. P. & Hornig, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

K-shell x-ray production cross sections of selected elements Al to Ni for 4. 0 to 38. 0 MeV /sup 10/B ions. [Cross sections, 4. 0 to 38 MeV, binding energy, electron capture decay, PWBA, energy shifts, multiple ionization]

Description: K-Shell x-ray production cross sections for the target elements Sc, Ti, V, Mn, Fe, Co, and Ni were measured for incident /sup 10/B ions over the energy range 4.0 to 38.0 MeV. The cross section data were compared to the theoretical predictions of the binary encounter approximation (BEA); the plane wave born approximation (PWBA); and the PWBA modified to include corrections for increased binding energy (B), Coulomb deflection of the incident ion (C), orbital perturbation due to polarization (P), … more
Date: 1976~
Creator: Monigold, G.; McDaniel, F. D.; Duggan, J. L.; Mehta, R.; Rice, R. & Miller, P. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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