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  • 1
    Electronic Resource
    Electronic Resource
    Collisional radiative models with loss and recycling (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 7496-7503 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We describe how the collisional–radiative model, which is usually used to simplify the treatment of excited states in the description of atomic processes in plasmas, must be extended if transport of the excited states is significant. We identify recycling of neutrals near the plasma edge as a circumstance where this is indeed the case. We show how the effective ionization and recombination rates appropriate to a correct ‘nonlocal' collisional–radiative model depend on the recycling rate, as well as electron temperature and density. We are able to identify the specific shortcomings of the conventional collisional–radiative model, and show that its use leads to a spurious source of neutral particles. We compare results obtained for the atomic dynamics using both the conventional and extended collisional–radiative models with the exact solution of the appropriate nonlinear equations in which all the excited states are explicitly included, and demonstrate that whereas the conventional model fails to reproduce the exact result, the extended model does so. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367513
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of detergents and sodium fluoride on the enzyme activities of the rat liver plasma membrane
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 266 (1972), S. 684-694 
    Details
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(72)90364-1
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum mechanics Quantum procrastination (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 387 (1997), S. 548-549 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Much of the practical business of quantum mechanics is in calculating exponential decay rates of unstable systems. Exponential decay is a familiar property of any system whose decay rate depends on its remaining, undecayed quantity (as in the decay of a large number of radioactive nuclei). But on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/42350
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of detergents and sodium fluoride on the enzyme activities of the rat liver plasma membrane
    Amsterdam : Elsevier
    BBA - Biochimica et Biophysica Acta 266 (1972), S. 684-694 
    Details
    ISSN: 0006-3002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-3002(72)90011-X
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  • 5
    Electronic Resource
    Electronic Resource
    Nonlinear laser spectroscopy (1982)
    Springer
    Applied physics 29 (1982), S. 160-169 
    Details
    ISSN: 1432-0649
    Keywords: 32 ; 35 ; 42.65 ; 32 ; 33 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688659
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  • 6
    Electronic Resource
    Electronic Resource
    Seeking non-exponential decay (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 298-298 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the most famous laws of physics is the exponential-decay law of radioactivity1: the decay of any radioactive isotope is characterized solely by its time constant r or equivalently by its half-life tfo = T Ioge2. During a time t, N0exp-t/r nuclei will decay, where NQ is the number of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/335298a0
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  • 7
    Electronic Resource
    Electronic Resource
    Non relativistic continuum wave functions for two coulomb centres (1975)
    Springer
    Theoretical chemistry accounts 38 (1975), S. 185-197 
    Details
    ISSN: 1432-2234
    Keywords: Continuum wave functions ; non-relativistic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We give the continuum wave function solutions to the Schrödinger equation for an electron moving field of two point nuclei, as an expansion in terms of one centre Coulomb wave functions in a prolate elliptical coordinate system. These solutions may be chosen to have a convenient asymptotic behaviour, and tend to the conventional solutions of the Helmholtz equation in the limit that the nuclear charge goes to zero. In symmetric systems, where both nuclei have the same charge the angular wave functions are found to be identical with those occurring in the free case, and the expansion coefficients for the corresponding radial solutions are given for selected values of electron energy and nuclear separation.[/p]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01125897
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  • 8
    Electronic Resource
    Electronic Resource
    Two centre continuum Coulomb wavefunctions in the entire complex plane (1976)
    Springer
    Theoretical chemistry accounts 42 (1976), S. 273-291 
    Details
    ISSN: 1432-2234
    Keywords: Two centre continuum Coulomb wavefunctions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We solve the Schrödinger Equation for an electron moving in the Coulomb field of two charged nuclei. We take proper account of the analytic structure of the solutions and thus determine their mathematical form in the entire complex plane. These general solutions are then used to construct the two-centre analogue of the usual one-centre Coulomb wavefunctions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00574449
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  • 9
    Electronic Resource
    Electronic Resource
    The antiprotonic helium atom (1993)
    Springer
    Hyperfine interactions 76 (1993), S. 353-369 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Born-Oppenheimer approximation is used to discuss the high rotational and vibrational state of the (He p−)e− system in the electronic 1sσ and 2pσ states. Very high angular momentum states, in which the antiproton is well outside the electron orbit, have a Rydberg-like character. states in which the antiproton is within the 1sσ electron orbit have enhanced radiative lifetimes due to the polarization of the 1sσ state by the antiproton. This effect may account for the long-lived component observed in antiproton destruction in He. Preliminary results on the effect of coupling to the 2pσ well, in which the polarization effects enhance the decay rate, are also presented. Some consequences for the suggestion that metastable antiprotonic He atoms may be used to promote antihydrogen formation are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02316736
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  • 10
    Electronic Resource
    Electronic Resource
    The semiclassical treatment of slow muonic collisions (1993)
    Springer
    Hyperfine interactions 82 (1993), S. 99-108 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper exposes some of the problems which occur when muons replace electrons in heavy ion collisions. It focusses on the coupling between the heavy particle and muonic motion in the semiclassical treatment of the collision and shows how an energy conserving classical path can be defined. An example, which shows some of the effects of this path, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01027949
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