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  • 1
    Electronic Resource
    Electronic Resource
    Pyrocondensation of anthracene (1987)
    s.l. : American Chemical Society
    The @journal of organic chemistry 52 (1987), S. 1582-1591 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00384a037
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  • 2
    Electronic Resource
    Electronic Resource
    Electron spin resonance studies of the effect of ion pairing on some simple reactions involving the tetracyanoethylene anion radical (1973)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 77 (1973), S. 2959-2964 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100643a007
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  • 3
    Electronic Resource
    Electronic Resource
    Isolation and structural elucidation of zoapatanol and montanol, novel oxepane diterpenoids from the Mexican plant zoapatle (Montanoa tomentosa) (1982)
    s.l. : American Chemical Society
    The @journal of organic chemistry 47 (1982), S. 1310-1319 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00346a029
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  • 4
    Electronic Resource
    Electronic Resource
    Single-mode optically activated phase modulator on GaAs/GaAlAs compound semiconductor rib waveguides (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 5964-5971 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on an optically activated phase modulator (OAM) and modulator array on GaAs-GaAlAs compound semiconductor rib waveguides. A rib waveguide device with an optical activation window of 5 μm in diameter was fabricated. Optical activation was produced by using a HeNe 632.8 nm wavelength as the free-carrier generator and a 1.3 μm laser as the signal carrier. A 33% modulation depth was observed and 10−2 index modulation was experimentally confirmed on an OAM working in the phase modulation regime. OAMs working in both phase- and cutoff-modulation regimes were further determined by considering the variation of the waveguide confinement factor. An 8.2 dB modulation depth was observed on an OAM working at the cutoff regime. Furthermore, the activation source for the free-carrier generation is in the mW power region, which significantly reduces the size and cost of all optical switching devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355209
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  • 5
    Electronic Resource
    Electronic Resource
    Calculation of the Auger spectrum of liquid water (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 2618-2623 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Auger spectrum of liquid water has been calculated by a Green's function method applied to a dimer in the effective field of point charges simulating the neighboring molecules. The positions of the molecules have been determined by a Monte Carlo calculation. The obtained theoretical spectrum has been compared to the theoretical and the experimental Auger spectra of gas-phase water and to the experimental Auger spectrum of ice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454041
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  • 6
    Electronic Resource
    Electronic Resource
    Development of a point plume in the presence of background rotation (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 10 (1998), S. 2369-2383 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper describes a laboratory study on the evolution of a point turbulent plume placed at the free surface of a homogeneous fluid layer in the presence of background rotation. It is shown that the plume initially evolves as if there is no rotation. However, the rotational effects become important after the plume descends a vertical distance hc1(approximate)3.3(B/Ω3)1/4 for a normalized time Ωtc1(approximate)2.4, whence the vertical descent rate of the plume is reduced while maintaining approximately the same lateral growth rate. Here Ω is the rate of background rotation and B is the specific buoyancy flux of the plume. The rotational effects inhibit the lateral growth of the plume at a time Ωtc2(approximate)5.5, when the maximum plume width is bc(approximate)1.4(B/Ω3)1/4. Thereafter, the vertical descent continues and the plume evolves into a cylindrical shape while developing a cyclonic circulation in and around it, except near the plume front. Upon reaching the bottom surface after traveling a fluid depth of H, the plume deflects, propagates horizontally, and becomes unstable breaking up into anticyclonic eddies. Studies carried out for the case of H〈hc1 show that this instability is initiated at a horizontal length scale proportional to the Rossby deformation radius of the deflected flow, and hence it is of baroclinic type. These eddies appear to align vertically with the cyclonic eddies formed by the barotropic instability of the surface rim current, thus producing heton-like structures. The influence of the diameter d0 of the plume on the flow evolution is also studied, and it is shown that plumes with aspect ratio h/d0〈12 (where h is the vertical extent) can be approximated as point plumes. Scaling arguments are advanced to explain the results. Some geophysical applications of the study are also discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.869754
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  • 7
    Electronic Resource
    Electronic Resource
    Does high density–low pressure etching depend on the type of plasma source? (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 2197-2202 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Etching of SiO2 with CF4 in three types of high density–low pressure (5×1011 cm−3, 1–10 mTorr) etch tools: electron cyclotron resonance (ECR), inductively coupled (ICP), and helicon (HRF) is described. Although the physical processes that produce the plasma in the three types of sources are quite different, the etch rate processes are identical when viewed from the wafer sheath boundary. Measurements demonstrate that if sufficient fluorine is present, the etch rate limiting step depends only on the ion energy flux to the wafer, rather than on the details of the chemical species. Etch rate control depends only on the wafer bias power. Experimental results are device independent so the etch rate in high density–low pressure plasma sources does not depend on the plasma source power. Major differences in tool etch rate characteristics are more likely determined by tool wall material (and wall chemistry) and tool geometry rather than the physical process that is used to produce the plasma. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871675
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  • 8
    Electronic Resource
    Electronic Resource
    Dose dependence and dose-rate dependence of the optically stimulated luminescence signal (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 259-263 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The expected behavior of the dose dependence of the optically stimulated luminescence (OSL) signal has been studied using numerical simulation. A simple model of one trapping state and one kind of recombination center is presented, and the sequence of sets of simultaneous differential equations governing the processes during excitation, relaxation, and light exposure are numerically solved. With the choice of reasonable trapping and recombination parameters, it has been shown that a quadratic dose dependence of this effect results from the model when the irradiation stage starts with empty trapping states. This may explain reports in the literature of an initial supralinear dose dependence of OSL. It is also shown that within the same model, one can get an initial linear dose dependence of OSL if one starts with partly filled traps. Also has been studied the influence of dose rate on the measured OSL signal for a constant total dose, and some effect has been seen for a certain dose-rate range. The similarities and dissimilarities of OSL as compared to thermoluminescence with respect to these phenomena are discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1330555
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  • 9
    Electronic Resource
    Electronic Resource
    New diamond-anvil cell design for far infrared magnetospectroscopy featuring in situ cryogenic pressure tuning (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 2883-2889 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel diamond-anvil cell (DAC) adaptation for far infrared (FIR) cryogenic magnetospectroscopy in a small-bore magnet is reported. A design featuring a multibellows ram is employed to generate amplified force for in situ pressure tuning of the DAC at cryogenic temperatures without increasing the overall diameter of the apparatus. A constructed version, using a 26-mm-diam double-bellows ram, is capable of producing 5 kN force (scalable to 10 kN with four bellows) when driven by 4He at 4.2 K. Signals are enhanced using paraboloidal cones to focus the FIR radiation on the sample and collect the transmitted signal. It is feasible to record transmission spectra to energies as low as 80 cm−1 with this apparatus using appropriate gasket-hole sizes and detectors. The pressure, magnetic field, and temperature can be tuned independently in the ranges 0–20 GPa (in steps as small as 0.05 GPa), 0–15 T, and 2–300 K. We present high pressure (4.2 K) Fourier-transform FIR spectra at fixed magnetic fields, and laser (118.8 μm) magnetospectroscopy data on the 1s–2p+ transition of Si donors in GaAs measured with this apparatus. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147121
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  • 10
    Electronic Resource
    Electronic Resource
    FLAT SPOT EXPLORATION (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 23 (1975), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The hydrocarbon-brine contact produces a flat reflection, unconformable with the lithologic reflections from the trap boundaries, and over a limited area bounded by structural contours. When it can be reliably detected and mapped, the flat spot can provide (i) a reasonably unambiguous indication and areal extent of a reservoir and (ii) an estimate of reservoir thickness.The gas-brine contact in thick reservoirs in offshore elastic sections is the easiest target. An example of gas mapping is presented in the paper. Other reservoirs represent a continuum of increasingly elusive targets.Increasing the range of applicability of flat spot exploration will require (i) increases in signal/noise and multiple ratio, increases in the three dimensional depth point density (or grid density), increased resolution and static and dynamic correction accuracy, and (ii) processing and interpretation aimed directly at flat spot mapping.Low relief structural and stratigraphic traps should provide the most attractive targets. The approach should be at least theoretically feasible, though not necessarily cost effective, for most major reservoirs with a well-behaved hydrocarbon brine contact.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1975.tb01547.x
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