Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Polarization energy distribution for impurity molecules in dense gases (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 7663-7666 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The polarization energy distribution of impurity molecules in dense gases is investigated. An approximate expression is derived for a random distribution and compared with results inferred from finite-temperature Monte Carlo studies for NO in argon (ρ≤2.7×1021 cm−3). It is found that when ρ≤1.8−2.0×1021 cm−3, the distribution has a similar shape with approximately the same peak position as that obtained from the Monte Carlo calculations. This result indicates that the peak position in this density range is due primarily to the r−4 dependence of the polarization energy and the random positions of the host molecules and does not reflect the hard core of the intermolecular interactions. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.477412
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Density dependence of the ionization potential of CH3I in argon and of the quasi-free electron energy in argon (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 506-513 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Field ionization has been employed as a new technique to determine the ionization potential of an impurity doped in a nonpolar fluid. This has been shown for a model system, CH3I doped into argon for argon densities ranging from the gas up to the triple point liquid. The ionization potential in the medium reflects the different possible configurations of the medium atoms around the dopant at the moment of excitation and, therefore, is given by a distribution. This distribution is identified with that of the polarization energy between the positive ion and the medium. The first and second moments of the polarization distribution were calculated at the densities at which the experiments were performed. Simulated spectra (generated using the experimental results obtained in pure CH3I, the calculated moments, and a Gaussian shape for the polarization distribution) reproduce closely the experimental ionization potential. Furthermore, by combining the experimental data with the calculated distributions, we obtained the density dependence of the quasi-free electron energy in argon. These results are consistent with previous experimental data and with recent theoretical calculations. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470136
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Determination of the conduction band energy minimum in fluid argon by means of field ionization (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 1305-1310 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The evolution of the ionization potential of H2S doped in argon for argon densities between the dilute gas and the triple point liquid was obtained by means of field ionization. The field ionization spectra of H2S in argon were simulated by convoluting the spectrum obtained in pure H2S with the calculated polarization energy distribution between the H2S ion and the medium. The density dependence of the conduction band energy minimum V0(ρ) (relative to vacuum) was obtained from the energy difference between the experimental spectra and the simulations. Excellent agreement was found between these values and those obtained using a larger molecule, CH3I. The values of V0(ρ) are compared to recent theoretical calculations. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471995
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Electric field effects in the photoionization and photoabsorption of methyl iodide
    Amsterdam : Elsevier
    Chemical Physics Letters 220 (1994), S. 437-442 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)00207-X
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Wall effects in the flow of flexible polymer solutions through small pores (1989)
    Springer
    Rheologica acta 28 (1989), S. 520-526 
    Details
    ISSN: 1435-1528
    Keywords: Polymersolution ; porous medium ; effectiveviscosity ; depletion layer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Effective viscosities of dilute and semidilute flexible solutions flowing through small cylindrical pores were determined in the Newtonian regime for various pore diameters. The low viscosities relative to the bulk were associated with a depletion phenomenon due to a steric exclusion of macromolecules from the pore wall. Using a two-fluid flow model, the depletion layer thickness was determined and discussed as a function of polymer concentration, ionic strength, and molecular weight. This thickness, which was constant and close to the macromolecule gyration radius in dilute regime, was found to decrease rapidly with polymer concentration in the semidilute regime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332923
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...