Berlin 2005 – wissenschaftliches Programm

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GR: Gravitation und Relativitätstheorie

GR 18: Postersitzung

GR 18.13: Poster

Freitag, 4. März 2005, 14:00–19:00, Poster TU BH

Broadening of neutron states quantized in gravitational field — •Boris P. Toperverg — Department of Experimental and Solid State Physics, Ruhr-University Bochum, 44780 Bochum

Various sources of the line width of resonance levels formed in gravitational potential and horizontal reflecting surface are theoretically discussed in view of possible experimental applications. One of them is just absorption inside the reflecting potential on a depth comparable with the extinction length. Two others, e.g. inelastic scattering by thermal fluctuations and off-specular scattering from surface roughness, partially destroy interference between waves impinging onto and reflected from the surface. Both mechanisms are considered within the framework of the Distorted Wave Born Approximation (DWBA). It is shown that they can be rather efficient if the lateral scale of fluctuations is smaller than the lateral projection of the neutron coherence length.