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  • 1
    Electronic Resource
    Electronic Resource
    Measurements ofn−p correlations in the reaction of relativistic neon with uranium (1986)
    Springer
    The European physical journal 323 (1986), S. 391-398 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Np
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report a preliminary measurement of coincident neutron-proton pairs emitted at 45° in the interaction of 400, 530, and 650 MeV/A neon beams incident on uranium. Charged particles were identified by time of flight and momentum, as determined in a magnetic spectrometer. Neutral particles were detected using a thick plastic scintillator, and their time of flight was measured between an entrance scintillator, triggered by a charged particle, and the neutron detector. The scatter plots and contour plots of neutron momentum vs. proton momentum appear to show a slight correlation ridge above an uncorrelated background. The projections of this plane on then-p momentum difference axis are essentially flat, showing a one standard deviation enhancement for each of the three beams energies. At each beam energy, the calculated momentum correlation function for the neutron-proton pairs is enhanced near zero neutron-proton momentum difference by approximately one standard deviation over the expected value for no correlation. This enhancement is expected to occur as a consequence of the attractive final state interaction between the neutron and proton (i.e., virtual or “singlet” deuterons). The implications of these measurements are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313520
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Conductivities of KF and CsF in methanol at 25°C (1996)
    Springer
    Journal of solution chemistry 25 (1996), S. 541-553 
    Details
    ISSN: 1572-8927
    Keywords: Potassium ; cesium ; fluoride ; halide ions and perchlorate ; methanol ; water ; molar conductivities ; ion association ; Gibbs energies of transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Electrolytic conductivities of KF and CsF in methanol solution have been determined at 25°C. The single ion molar conductivities of the fluoride ion, obtained from the two salts are in excellent agreement and indicate that the F− ion is highly solvated in methanol (MeOH). Combination of the present and literature data for related salts in both water and MeOH indicate that while the primary solvation of ions may be more extensive in H2O there is considerable enhancement of the secondary solvation sheath in MeOH. Recalculation of high precision literature conductivity data using a consistent mathematical approach indicates that ion pair formation constants for simple 1:1 electrolytes in MeOH are 1 or 2 orders of magnitude greater than in H2O. This is shown to be entirely due to the less favorable solvation of ions in MeOH, as the Gibbs energies of transfer of the neutral ion pairs MX from H2O to MeOH are also unfavorable. Calculations also show that ion association in MeOH is strongly influenced by coulombic interactions whereas in H2O short range interactions are generally more important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00973084
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Conductivities of 1∶1 salts in 2-cyanopyridine (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 579-593 
    Details
    ISSN: 1572-8927
    Keywords: 2-Cyanopyridine ; conductivities ; 1∶1 electrolytes ; dilute solutions ; single ion molar conductivities ; ion association ; mixed solvents ; acetonitrile ; concentrated solutions ; LiAsF6 ; high energy density lithium batteries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Electrolytic conductivities of eight simple 1∶1 electrolytes have been measured in dilute solutions of 2-cyanopyridine (2CNP) at 30°. Infinite dilution mobilities and association constants were calculated using the Fuoss-Hsia equation. With the exception of LiCF3SO3 all salts show very little association, consistent with the very high dielectric constant of 2CNP. The weak association which does occur is attributed to weak ion-solvent interactions. No evidence was found for triple ion formation. Conductivities of concentrated solutions of LiAsF6 in 2CNP increase slowly with concentration reaching a maximum at a concentration of around 0.65 mol-dm−3. These conductances are slightly lower than those in propylene carbonate which has a lower dielectric constant and a higher viscosity. Conductivities of concentrated LiAsF6 solutions in 2CNP mixtures with acetonitrile vary monotonically, consistent with solution viscosities, and show no sign of the maximum commonly observed in mixed organic solvents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00972746
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    Paper (German National Licenses)
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