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in subjects: "Luminescence"  
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Kinetic modelling of krypton fluoride laser systems

Description: A kinetic model has been developed for the KrF* rare gas halide laser system, specifically for electron-beam pumped mixtures of krypton, fluorine, and either helium or argon. The excitation produced in the laser gas by the e-beam was calculated numerically using an algorithm checked by comparing the predicted ionization yields in the pure rare gases with their experimental values. The excitation of the laser media by multi-kilovolt x-rays was also modeled and shown to be similar to that produce… more
Date: November 1, 1983
Creator: Jancaitis, K.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Time-Dependent Study of Radiation Trapping by Time-Delayed Two-Photon Absorption

Description: The transport of resonance radiation through an optically thick vapor of Sr atoms is studied. A pulsed dye laser tuned to the 461 nm resonance line excites a narrow (approx. 60 ..mu..m diam) column of Sr atoms along the axis of a cylindrical oven containing Sr vapor and Ar buffer gas. After a delay of less than or equal to 80 ns, a second dye laser excites the atom from the first excited state (5s5p) to a higher excited state (5s7s). The fluorescence from this latter transition is monitored as … more
Date: October 1, 1983
Creator: Molander, W.; Belsley, M.; Streater, A. & Burnett, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Narrow-band, near-uv, high-repetition-rate laser-induced fluorescence system for use as an edge diagnostic in fusion machines

Description: A laser system for impurity diagnostics in the edge region of fusion devices is described, representing a substantial advance in repetition rate and capacity for velocity distribution measurements. A single mode cw dye laser with scan capability of 30 GHz in 100 msec is amplified by 3 fast flow dye cells, pumped by a high repetition rate excimer laser (60 mJ/pulse at 130 Hz at 308 rm). Average power during the 8 ns pulses of about 0.8 MW for amplified narrowband output at 604 rm, and 80 kW afte… more
Date: January 1, 1983
Creator: Young, C. E.; Gruen, D. M.; Pellin, M. J. & Calaway, W. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optical diagnostics for condensed-phase shock-compressed molecular systems

Description: Experimental techniques capable of obtaining information about the molecular phenomenology in the region through and immediately behind the shockfront during the shock-compression of condensed-phase molecular systems are discussed and compared. Difficulties associated with performing measurements in this region are briefly reviewed. Some concomitant static experiments that can be used to complement the dynamic measurements are suggested. Developments and advances expected in diagnostic techniqu… more
Date: January 1, 1983
Creator: Schmidt, S.C.; Moore, D.S. & Shaner, J.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multiphoton laser-induced-fluorescence studies of simple species

Description: Recent studies have demonstrated multiple-photon excitation of atomic species. Bischel and coworkers have provided a detailed description of two-photon excitation fluorescence in the detection of atoms generated in a low pressure discharge and its possible application as a diagnostic tool in flame and plasmas. It is also believed that such techniques can be useful in detecting molecular transients which are difficult to detect otherwise as demonstrated in two-photon laser-induced fluorescence (… more
Date: January 1, 1983
Creator: Tiee, J. J.; Ferris, M. J.; Loge, G. W. & Wampler, F. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

5f state interaction with inner coordination sphere ligands: einsteinium 3+ ion fluorescence in aqueous and organic phases

Description: The interaction between 5f electron states of einsteinium 3+ ion and coordinated ligands in solution has been probed using laser-induced fluorescence. Aquo einsteinium 3+ ion was observed to fluoresce from its first excited J = 5 state in a broad-band peaking at 9260 wavenumbers. The observed fluorescence lifetimes were 1.05 microseconds and 2.78 microseconds in H/sub 2/O and D/sub 2/O (99+ % D atom), respectively. The non-radiative decay rates derived from the lifetime data are compared with p… more
Date: January 1, 1983
Creator: Beitz, James V.; Wester, Dennis W. & Williams, Clayton W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technique to extend ozonesonde temperature data to the mesopause

Description: An analysis of global Multichannel Filter Radiometer radiances and ozone retrieval results revealed that the simulated radiances were not always representative of the measurements for the CO/sub 2/ channels sensing the temperatures in the middle and upper stratosphere. This problem was particularly pronounced, but not limited to, higher latitude winter conditions. Because of the special importance of the middle stratosphere and high latitudes for ozone analyses, a research effort was undertaken… more
Date: October 1, 1983
Creator: Weichel, Roger L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multiphoton-induced fluorescence and ionization of B/sup 1/. sigma. /sup +/ carbon monoxide

Description: The B/sup 1/..sigma../sup +/ state of carbon monoxide was created by a two-photon absorption of 230-nm laser radiation. The B/sup 1/..sigma../sup +/ state was identified by the positions of the 0-0 absorption band Q-branch and the vibrational bands of B/sup 1/..sigma../sup +/ ..-->.. A/sup 1/PI fluorescence occurring in the 525-nm region. Collision-induced b/sup 3/..sigma../sup +/ ..-->.. a/sup 3/PI emission in the 350-nm region was also observed. The lifetimes of both the B/sup 1/..sigma../sup… more
Date: January 1, 1983
Creator: Loge, G. W.; Tiee, J. J. & Wampler, F. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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