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  • 1
    Electronic Resource
    Electronic Resource
    Transient digitizer for the determination of microsecond luminescence lifetimes (1984)
    s.l. : American Chemical Society
    Analytical chemistry 56 (1984), S. 1395-1400 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00272a043
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  • 2
    Electronic Resource
    Electronic Resource
    Pulse radiolysis of aqueous lithium chloride solutions (1975)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 79 (1975), S. 2700-2704 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100591a021
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  • 3
    Electronic Resource
    Electronic Resource
    Conformational analysis and active site modeling of angiotensin-converting enzyme inhibitors (1985)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 28 (1985), S. 393-399 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00381a021
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation of the enhanced efficiencies of small superconducting loop antenna elements (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 2914-2918 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The fields backscattered from arrays of electrically small copper and YBCO superconducting loops are measured and compared with moment method predictions to confirm the gain enhancements and changes in Q factors due to increasing the efficiencies of the antenna elements alone, without the influence of feed and matching networks. Measurements on coplanar and parallel loop arrays show only small increases in the backscattered fields of the YBCO scatterers, with the largest increase in efficiency being for the single loop. The mutual resistance between elements reduces the benefit of adding more elements to a YBCO loop, to a greater extent than when copper elements are added to a copper loop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354647
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of collisions on ion dynamics in electron-cyclotron-resonance plasmas (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 1720-1728 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A one-dimensional kinetic code is used to study the effect of ion-neutral (charge exchange and elastic scattering) and ion-ion collisions on plasma flow in the downstream region of an electron-cyclotron-resonance plasma etching system. Ions are assumed to leave the source region at the Bohm velocity. Argon, nitrogen, and CF4 plasmas are simulated, assuming that the dominant ion species are Ar+, N2+, and CF3+, respectively. Results show that charge exchange and elastic scattering collisions play a significant role in reducing the electrostatic potential variation in the downstream region. For neutral gas pressures above ∼1 mTorr, the potential drop in the downstream region is small, which means that most of the energy with which ions hit the substrate surface is gained while crossing the substrate sheath region. Although the effect of ion-ion collisions on the plasma potential profile and on the ion distribution function is weak, ion-ion collisions are responsible for transferring energy from the parallel to the perpendicular direction and hence increasing the perpendicular ion temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351695
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  • 6
    Electronic Resource
    Electronic Resource
    Submillimeter wave spectroscopy of XeH+ and XeD+ (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 2352-2360 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The J=0–1 rotational transition of XeH+ and the J=1–2 transition of XeD+, which both occur near 390 GHz, have been studied by microwave absorption spectroscopy. For each of these all nine naturally occurring stable isotopes of xenon were detected. The magnetic hyperfine structure for the 129Xe forms and the electric quadrupole–magnetic hyperfine structure of both 131Xe forms were fully resolved and analyzed to determine the CI and eQq0 constants. The scaled spin–rotation parameter CI/(gIB) is found to be practically identical in XeH+ and HI, as it is also in the isoelectronic pair KrD+ –DBr/HBr. The available magnetic field was too small to resolve the rotational Zeeman effect, but the rotational g factor of XeH+ was estimated from Zeeman broadening. The mass-independent Dunham parameters U01, ΔH01, and ΔXe01 were determined from the very accurate microwave frequencies combined with higher order Dunham coefficients from published Fourier-transform infrared (FTIR) spectroscopy of XeH+ . Although it was not practical to observe XeH+ or XeD+ in excited vibrational states, we were able to detect the J=0–1 (v=1) transition of ArD+ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460941
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  • 7
    Electronic Resource
    Electronic Resource
    Spectroscopic properties of OCS and OCCl+ by Møller–Plesset perturbation theory and configuration interaction (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 431-441 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Ab initio calculations have been carried out on the stretching potential energy surfaces of OCS and the isoelectronic positive ion OCCl+. The methods used included fourth order Møller–Plesset perturbation theory with single, double, and quadruple substitutions (MP4SDQ), singles and doubles configuration interaction (CI-SD), and the latter with the addition of a size-consistency correction [designated CI-SD(s)]. Identical calculations were also carried out on the diatomics CO, CS, and CCl+, and these results were used to correct the CI-SD(s) potential energy functions of OCS and OCCl+. Stretching vibrational band origins have been calculated variationally for both OCS and OCCl+, and those for OCS obtained from the corrected CI-SD(s) potential function are within 0.4% of experiment for transitions up to 5000 cm−1. The ground state rotational constant of OCCl+ is predicted to be 5955±15 MHz, while the band origins of the ν1 and ν3 stretching fundamentals are predicted to lie at 793(10) and 2282(20) cm−1, respectively. Electric dipole moments have been calculated from the CI-SD wave functions, and rotationless dipole moment matrix elements have been derived from the analytical dipole moment functions and the vibrational wave functions obtained from the variational calculations. The ν3 band of OCCl+ is predicted by CI-SD to be fairly strong with a band strength of 1490 cm−2 atm−1, while the ν1 band is weaker by more than 1 order of magnitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460358
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  • 8
    Electronic Resource
    Electronic Resource
    The potential energy and dipole moment surfaces of NF2 and O−3 by complete active space self-consistent field (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 5020-5028 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Three-dimensional potential energy and dipole moment surfaces have been calculated for the 25 electron radicals NF2 and O−3 in their 2B1 ground electronic states by the complete active space self-consistent field (CASSCF) method with basis sets of 87 (NF2) and 99 (O−3) contracted Gaussian-type orbitals. Spectroscopic constants have been calculated from the analytical potential energy functions for each species, and the results for NF2 are compared to the available experimental data. Predictions of the rotational and rotational–vibrational spectra of O−3 have been made by comparison to the NF2 results. Vibrational band origins have been calculated by perturbation theory and also variationally in a basis of distributed Gaussian functions. Rotationless dipole moment matrix elements and vibrational band intensities have been determined from the CASSCF dipole moment functions. The fundamental vibrational band origins and intensities of O−3 are predicted to be 979 cm−1/0.87 cm−2 atm−1 (ν1), 565 cm−1/17.8 cm−2 atm−1 (ν2), and 739 cm−1/2620 cm−2 atm−1 (ν3). Smaller basis set calculations of the first three excited electronic states of O−3 have also been carried out, and the results are compared to previous photodissociation experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458639
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  • 9
    Electronic Resource
    Electronic Resource
    Spectroscopic properties of the X 1Σ+ and a 3Π electronic states of CF+, SiF+, and CCl+ by multireference configuration interaction (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 1889-1894 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Potential energy and dipole moment functions have been calculated using multireference configuration interaction (MRCI) techniques for CF+, SiF+, and CCl+ in their ground 1Σ+ and first 3Π electronic states with large Gaussian basis sets. Where experimental data is available, the MRCI values of re and ωe are accurate to within 0.006 A(ring) and 7 cm−1, respectively. The Te values for the a 3Π–X 1Σ+ transitions for CF+, SiF+, and CCl+are calculated to be 4.77±0.05 eV, 4.78±0.05 eV, and 3.19±0.05 eV (3.16 eV), respectively (experimental value in parentheses). Rotational and vibrational spectroscopic constants are also predicted for all three species in the 3Π state. Infrared transition probabilities have been calculated from the MRCI potential energy and dipole moment functions. Intense infrared transitions are predicted for all three species in both their ground and first excited state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459066
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  • 10
    Electronic Resource
    Electronic Resource
    Configuration interaction potential energy and dipole moment functions for thirteen 22 electron diatomics (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 6061-6068 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Singles and doubles CI with a large Gaussian basis set has been used to calculate potential energy and dipole moment functions for the following series of 22 electron diatomics: AlF, SiF+, AlO−, SiO, PO+, SiN−, PN, NS+, CP−, CS, CCl+, BS−, and BCl. A size consistency correction was applied to the CI-SD potentials to obtain results designated CI-SD(s). The calculations on the neutral species were used to correct the ab initio values of re and ωe for the ions, resulting in agreement with experiment to within 0.002 A(ring) for re and 10 cm−1 for ωe in those cases where high resolution spectroscopic results were available (CCl+, SiF+, and PO+), and predictions for the spectra of the other five ions are expected to be of similar accuracy. The CI-SD(s) corrected values for CCl+, SiF+, and PO+ are somewhat closer to experiment than our earlier corrected MP4SDQ values, and the problems with RHF→UHF instability encountered in the MP4SDQ calculations of vibrational constants of certain species do not appear to affect the present work. Dipole moment matrix elements have been calculated from the CI-SD dipole moment functions and CI-SD(s) potential functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458378
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