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Abstracts of papers Minneapolis Fall Meeting (1963)

Litchfield, C. C. ; Rakoff, Henry ; Maire, Renȳ ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1963; 40(9): 9-45. Published 1963 Sep 01. doi: 10.1007/bf02632851.

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Publikationsdatum: 1963-09-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Publiziert von Wiley

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Analysis of polarizabilities, potentials, and geometries of alkali–halide dimers (1991)

Chauhan, R. S. ; Sharma, S. C. ; Sharma, S. B. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 95 (1991), S. 4397-4406

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: An analysis of electronic polarizabilities, interionic potentials, and equilibrium geometries for 20 alkali–halide dimers such as Na2Cl2 is presented. The electronic polarizabilities of ions in dimers have been calculated by taking account of the electrostatic potential due to neighboring ions within the Seitz–Ruffa energy level analysis. The polarizabilities thus obtained for dimers are then used to evaluate the magnitudes of polarization energies and van der Waals dipole–dipole energies. For describing the overlap repulsive potential we have adopted two forms: (i) the revised version of the Born–Mayer potential and (ii) the Harrison form for the overlap repulsive energy. These potentials have been used to obtain the binding energies of monomers as well as dimers, spectroscopic constants of monomers, equilibrium geometries of dimers, and dimerization energies. The results have been discussed and compared with available experimental data.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.461763

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3

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A Monte Carlo wave function study of the effect of collisions on the coherent multiphoton excitation of SF6 (1994)

Mitra, S. S. ; Bhattacharyya, S. S.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 101 (1994), S. 10648-10654

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: Collisional interruption of coherent excitation of SF6 in the lower discrete region of its laser absorbing mode (ν3) have been studied using the recently developed quantum Monte Carlo wave function (QMCWF) method. The usual pure pump mode description up to 3ν3 and complete mixing of all modes (QC) above it have been assumed. The rotational and anharmonic splitting of the vibrational states upto 3ν3 are taken into account but splitting due to tensor interaction terms are neglected. Excitation to QC is represented by irreversible leakage from the coherent ladder modeled by an imaginary term in the Hamiltonian of the coherently excited vibrational rotational levels. QMCWF study has been carried out at the laser frequency 942.8 cm−1 for which the local time average populations in the intermediate excited vibrational states are found to be negligible. Large leakage occurs only from narrow band of ground rotational states due to 3 photon resonances but their number increases with increasing intensity. Two different collisional energy transfer models, one obeying symmetry imposed restrictions and propensity rule, and the other free from such restrictions except the fact that collisions restore the thermal distribution, have been used. Results show different pressure effects at different temperature and for different intensities. However, the two different models used for collisional rotational transition probabilities give similar enhancement of leakage at high intensities. © 1994 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.467878

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4

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Origin of minor constituents of commercial oleic acid (1982)

Murase, Y. ; Lin, S. S. ; Min, D. B. S. ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1982; 59(1): 47-50. Published 1982 Jan 01. doi: 10.1007/bf02670067.

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Publikationsdatum: 1982-01-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

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Abstracts (1961)

Reiners, R. S. ; Chang, S. S. ; Kawamura, Sini’tiro ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1961; 38(2): 109-112. Published 1961 Feb 01. doi: 10.1007/bf02633913.

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Publikationsdatum: 1961-02-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

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6

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Preview abstracts released! (1963)

Miller, R. W. ; Earle, F. R. ; Albrecht, H. ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1963; 40(3): 8-8. Published 1963 Mar 01. doi: 10.1007/bf02640707.

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Publikationsdatum: 1963-03-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

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7

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Polarographic studies of fat oxidation (1955)

Kalbag, S. S. ; Narayan, K. A. ; Chang, S. S. ; [weitere]

Wiley

In: Journal of the American Oil Chemists' Society. 1955; 32(5): 271-274. Published 1955 May 01. doi: 10.1007/bf02634458.

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Publikationsdatum: 1955-05-01

Print ISSN: 0003-021X

Digitale ISSN: 1558-9331

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

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8

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Coherent anti-Stokes Raman spectroscopy of shock-compressed liquid carbon monoxide (1991)

Moore, D. S. ; Schmidt, S. C. ; Shaw, M. S. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 95 (1991), S. 5603-5608

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: Vibrational spectra of liquid carbon monoxide shock compressed to several high pressure/high temperature states were recorded using single-pulse multiplex coherent anti-Stokes Raman scattering. Vibrational frequencies, third-order suceptibility ratios, and linewidths are reported for the fundamental and first excited-state transition. The observed vibrational frequency shift with shock pressure was substantially less than that observed previously in nitrogen, implying a significant difference in the details of their inter- and intramolecular potentials. The transition intensity and linewidth data suggest that thermal equilibrium of the vibrational levels is attained in less than 10 ns at these shock pressures, and the vibrational temperatures obtained are comparable to calculated equation-of-state temperatures. The measured linewidths suggest that the vibrational dephasing time decreased to ∼2 ps at our highest pressure shock state.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.461634

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Predissociation linewidths of the (1,0)–(12,0) Schumann–Runge absorption bands of O2 in the wavelength region 179–202 nm (1990)

Cheung, A. S.-C. ; Yoshino, K. ; Esmond, J. R. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 92 (1990), S. 842-849

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: A nonlinear least-squares method of retrieving predissociation linewidths from the experimental absolute absorption cross sections of Yoshino et al. [Planet. Space Sci. 31, 339 (1983)] has been applied to the (1,0)–(12,0) Schumann–Runge bands of oxygen. Predissociation linewidths deduced for the Schumann–Runge bands are larger than the theoretical predictions of Julienne [J. Mol. Spectrosc. 63, 60 (1976)] and the latest measurements of Lewis et al. [J. Quant. Spectrosc. Radiat. Transfer 36, 187 (1986)]. The larger linewidths found will have an impact on calculations of solar flux penetration into the Earth's atmosphere and of the photodissociation rates of trace species in the upper atmosphere. Systematic variation of predissociation linewidths with rotational quantum number is observed in the bands (v',0) with v'=6, 8, 9, 11, and 12.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.458117

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10

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Attenuation length measurements in cadmium arachidate Langmuir–Blodgett films (1991)

Sastry, Murali ; Ganguly, P. ; Badrinarayanan, S. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 95 (1991), S. 8631-8635

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: Attenuation lengths in cadmium arachidate [(C19H39COO)2Cd] multilayer Langmuir–Blodgett films deposited on thick lead arachidate [(C19H39COO)2Pb] films have been determined in this communication. A discrete layer model appropriate to the ordered structure of these built-up films is proposed and applied for the first time to the measurements of the x-ray photoemission intensity variation with electron takeoff angle and attenuation lengths for 950–1350 eV electrons are evaluated. These lengths agree with earlier attenuation length measurements in Langmuir–Blodgett films and are higher than in most inorganic materials.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.461241

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