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  • Cambridge University Press  (9)
  • American Institute of Physics (AIP)  (7)
  • Blackwell Publishing Ltd  (4)
  • American Geophysical Union (AGU)
  • Society of Exploration Geophysicists
  • 1985-1989  (12)
  • 1970-1974  (9)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    TFTR Thomson scattering system (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1015-1017 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The TFTR Thomson scattering system has been operational since January 1984. The diagnostic uses two ruby lasers and two spectrometer-detector systems to provide profiles at two times in a discharge. The two scattering lines consist of 76 spatial channels which span the 200-cm vacuum vessel along a major radius. The detectors are gated, intensified CCD arrays with single photoelectron sensitivity. Te(R) and Ne(R) profiles are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138255
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  • 2
    Electronic Resource
    Electronic Resource
    High power picosecond laser system at 248 nm (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 2235-2240 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe a powerful picosecond KrF* laser system consisting of a synchronously pumped dye oscillator, a three-stage dye amplifier, frequency conversion to 248 nm, and amplification through a series of excimer modules. Characteristics are given at each stage of the system. With the first stage of the system complete, a focused intensity of ∼1016 W/cm2 is obtained. Initial visible spectra obtained by interaction with various targets are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139940
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  • 3
    Electronic Resource
    Electronic Resource
    Instrumentation and data acquisition for in situ electrochemistry at the Daresbury SRS : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2386-2389 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: X-ray diffraction and absorption spectroscopy provide complementary structural tools for the in situ characterization of electrode surfaces. To optimize surface sensitivity, techniques such as glancing angle scattering geometries and spectrum differencing can be employed while the application of synchrotron radiation allows the real-time collection of data. This paper outlines recent developments in in situ electrochemistry on the Daresbury SRS and describes an electrochemical cell for in situ x-ray studies, associated glancing angle instrumentation, together with computer hardware and software optimized for data acquisition using potential modulation techniques. Important fundamental and industrial applications are highlighted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140727
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  • 4
    Electronic Resource
    Electronic Resource
    Collisional relaxation of DF(v=1) and HF(v=1) by the DF dimer (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 1340-1347 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Overtone vibration-laser double resonance measurements determine the vibrational relaxation rates of DF(v=1) and HF(v=1) by the DF dimer. Both monomers are efficiently relaxed by the dimer at a rate that is 20% of the gas kinetic rate. The similarity of the rate constants for the two systems, which have very different energy defects, indicates that the relaxation occurs by collision complex formation and energy redistribution, rather than direct vibration-to-vibration energy transfer from the monomer to the dimer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452222
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  • 5
    Electronic Resource
    Electronic Resource
    Collisional energy transfer via vibrational predissociation: Relaxation of HF(v=1) by HF dimers (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 1132-1137 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Overtone vibration–laser double resonance measurements determine the vibrational relaxation rate of HF(v=1) by HF dimers. Vibration-to-vibration energy transfer from the excited monomer to the dimer followed by vibrational predissociation of the dimer provides an efficient pathway for vibration-to-translation energy transfer that deexcites the monomer at 40% of the gas kinetic collision rate. Analysis of the pressure dependence of the observed decay constants using a simple kinetic model establishes a rough upper limit of 10 ns on the predissociation lifetime of the collisionally excited dimer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449475
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  • 6
    Electronic Resource
    Electronic Resource
    A direct determination of the role of vibration-to-vibration energy transfer in HF(v=3,4) self-relaxation (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 220-226 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Overtone vibration-laser double resonance directly measures the relative importance of vibration-to-vibration and vibration-to-translation-and-rotation energy transfer for HF(v=3 and v=4) at room temperature. The fraction of HF(v) molecules relaxing by V–V energy transfer is 0.44±0.05 and 0.16±0.05 for v=3 and v=4, respectively, compared to 0.59±0.10 for v=2. These measurements show that V–T,R energy transfer is the dominant relaxation mechanism for HF(v≥3) and the observed decreased amount of V–V energy transfer for higher initially excited vibrational levels is in good agreement with a chemiluminescence measurement and several theoretical calculations. The data demonstrate that the magnitude of the energy defects for the component pathways primarily determines the energy transfer mechanism for HF(v=2–4).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450174
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  • 7
    Electronic Resource
    Electronic Resource
    Rates and pathways of vibrational self-relaxation of HF(v=2) between 300 and 700 K (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 780-788 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The temperature dependencies of the total self-relaxation rate constants for the vibrational deactivation of HF(v=2) and HF(v=1) and the state-to-state vibration-to-vibration (V–V) and vibration-to-translation-and-rotation (V-T,R) energy transfer components of the HF(v=2) self-relaxation process are measured using the overtone vibration excitation-laser double resonance technique. The total self-relaxation rate constants vary inversely with temperature. The much weaker temperature dependence of HF(v=2) self-relaxation compared to that of HF(v=1) arises from the significant role of the V–V energy transfer route. Competition between energetics and collision duration results in a weaker inverse variation with temperature for the slightly endothermic V–V route than for the exothermic V-T,R route for HF(v=2). The branching ratio for V–V energy transfer increases slightly with temperature and the data suggest that two quantum relaxation processes constitute no more than 10% of the total self-relaxation of HF(v=2). The available temperature dependence data on self-relaxation of HF(v=1–5) form a consistent picture in which the energetics of the V–V and V-T,R relaxation pathways control their relative contributions to the total energy transfer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448503
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  • 8
    Electronic Resource
    Electronic Resource
    A NOVEL HIGH-SPEED ALGORITHM FOR SUMMATIONAL TYPE SEISMIC VELOCITY ANALYSES (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 20 (1972), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Velocity analysis of reflection seismic data has increased in popularity with petroleum exploration personnel to such an extent that it now constitutes a significant tool in the routine digital processing program. One drawback to such an analysis is its computational cost, resulting from the numerous mathematical calculations required by a digital computer to extract comprehensive velocity information.The subject algorithm affords a computational cost saving of approximately one order of magnitude over a straightforward summational type velocity analysis with little sacrifice in accuracy. The utility of the algorithm is demonstrated on some Offshore Louisiana seismic data and a comparison of the results reveals that they are almost identical with a conventional velocity analysis.The algorithm is based on the concept that a normal-moveout pattern of time shifts may be accurately applied over a considerable span of zero-offset times to a CDP trace gather, rather than only at a single zero-offset time. With each application however, the rms-velocity associated with the moveout pattern is different. A specific relationship which associates an rms-velocity with a zero-offset time for the same moveout time delay pattern is approximated by numerical simulation studies on a digital computer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1972.tb00668.x
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  • 9
    Electronic Resource
    Electronic Resource
    Multiplication and spread of pathovars of Xanthomonas campestris in host and non-host plants (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 35 (1986), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Multiplication and spread of respresentative strains of three pathovars of Xanthomonas campestris were monitored by maceration and plating from inoculated leaves of the host and non-host plant species Oryza sativa, Poa trivialis, Brassica oleracea and Phleum pratense.Homologous interactions were characterized by higher multiplication rates and larger population increases than heterologous interactions, except for pv. oryzae which increased as much as pv. poae in leaves of Poa. Spread of heterologous pathovars was limited, but homologous pathovars were distributed throughout host leaves soon after inoculation. Pvs poae and oryzae (from Poaceae) demonstrated considerably greater population increases and higher initial multiplication rates than pv. campestris in leaves of all non-host Poaceae. Pv. poae spread further into leaves of Oryza and pv. oryzae further into leaves of Poa and Phleum than did pv. campestris. Numbers of pv. poae declined in Brassica as did those of pv. oryzae, which was localized within 2 mm of the point of inoculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1986.tb02001.x
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  • 10
    Electronic Resource
    Electronic Resource
    Monitoring Treatment in Congenital Adrenal Hyperplasia Use of Serial Measurements of 17–OH–Progesterone in Plasma, Capillary Blood, and Saliva (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 458 (1985), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1985.tb14604.x
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