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  • 1
    Electronic Resource
    Electronic Resource
    Neutron transport in ultradisperse copper layers under strong scattering conditions (2000)
    Springer
    Physics of the solid state 42 (2000), S. 1908-1910 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The character of neutron transport in ultradisperse copper near the total reflection boundary is studied. The dependence of the ultracold neutron transmission on the thickness of a nonuniform layer under the strong scattering condition kl≤10 (k is the wave vector and l is the mean free path) is obtained for the first time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1318885
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental study of quasi-elastic scattering of ultracold neutrons (2002)
    Springer
    The European physical journal 28 (2002), S. 299-304 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 61.12.-q Neutron diffraction and scattering – 61.12.Ex Neutron scattering techniques (including small-angle scattering) – 66.10.Cb Diffusion and thermal diffusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Ultracold neutrons (UCN) are lost from traps if they are quasi-elastically scattered from the wall with an energy gain sufficient to exceed the Fermi potential for the wall. Possible mechanisms of a quasi-elastic energy transfer are, for instance, scattering from hydrogen diffusing in an impurity surface layer or on surface waves at a liquid wall. Using two different experimental methods at the UCN source of the Institut Laue-Langevin we have investigated both the energy-gain and the energy-loss side of quasi-elastic UCN scattering on Fomblin grease coated walls. For Fomblin oil and similar new types of oil we report up-scattering data as a function of temperature and energy transfer. These low-temperature oils may be used in an improved measurement of the neutron lifetime, which requires extremely low wall reflection losses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2002-00233-7
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  • 3
    Electronic Resource
    Electronic Resource
    Cold deformed fission in232U(n, f) and239Pu(n, f) (1992)
    Springer
    The European physical journal 341 (1992), S. 319-326 
    Details
    ISSN: 1434-601X
    Keywords: 25.85.Ec
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Masses, charges and kinetic energies of light fission fragments from the reactions232U(n, f) and239Pu(n, f) induced by thermal neutrons have been measured on the Cosi fan tutte spectrometer of the Institut Laue-Langevin in Grenoble. Both at very high and very low kinetic energies marked fine structures in the mass yields and odd-even staggerings in the charge yields are observed. In the framework of a scission point model the results are shown to point to compact and deformed scission configurations, respectively, where at scission the fragments carry no intrinsic excitation energy. The two limiting processes may, therefore, be called cold compact fission (usually known as cold fission) and cold deformed fission. The latter process as a general phenomenon of low energy fission has come into focus only recently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283541
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    Paper (German National Licenses)
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