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  • Electronic Resource  (2)
  • PACS. 47.45.Dt Free molecular flows – 51.20.+d Viscosity, diffusion, and thermal conductivity – 29.25.Pj Polarized and other targets  (1)
  • measured polarization (E  (1)
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  • Electronic Resource  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Physics 72 (1965), S. 417-435 
    ISSN: 0029-5582
    Keywords: NUCLEAR REACTIONS ; Natural targets ; ^1^2C(p, p), E=4.7-11.3 MeV ; ^1^9^7Au(p, p), E=6 MeV ; deduced phase shifts ; measured polarization ; measured polarization (E ; θ) ; θ), σ(E
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    ISSN: 1434-6079
    Keywords: PACS. 47.45.Dt Free molecular flows – 51.20.+d Viscosity, diffusion, and thermal conductivity – 29.25.Pj Polarized and other targets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The use of storage cells has become a standard technique for internal gas targets in conjunction with high energy storage rings. In case of spin-polarized hydrogen and deuterium gas targets the interaction of the injected atoms with the walls of the storage cell can lead to depolarization and recombination. Thus the number of wall collisions of the atoms in the target gas is important for modeling the processes of spin relaxation and recombination. It is shown in this article that the diffusion process of rarefied gases in long tubes or storage cells can be described with the help of the one-dimensional diffusion equation. Mathematical methods are presented that allow one to calculate collision age distributions (CAD) and their moments analytically. These methods provide a better understanding of the different aspects of diffusion than Monte Carlo calculations. Additionally it is shown that measurements of the atomic density or polarization of a gas sample taken from the center of the tube allow one to determine the possible range of the corresponding density weighted average values along the tube. The calculations are applied to the storage cell geometry of the HERMES internal polarized hydrogen and deuterium gas target.
    Type of Medium: Electronic Resource
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