ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
Within the Born approximation, a cumulant expansion is used for the formulation of X-ray or neutron reflectivity. Odd- (third-) order cumulants indicate asymmetric profiles; they may only be detected in layer systems via a Qz dependence of the oscillation period of Kiessig fringes. Fourth-order cumulants are also visible in the larger Qz regime for single interface systems. As an example of an asymmetric surface, a triangular height distribution function is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S002188989700441X