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Biomedical subjects

U Landman

Publications and source records attributed to U Landman.

59 records · Page 4Linked to original sources
PubMed1977

Random walks and generalized master equations with internal degrees of freedom.

We present an extension of the continuous-time random walk formalism to include internal states and to establish the connection to generalized master equations with internal states. The theory allows us to calculate physical observables from which we can extract the characteristic parameters of the internal states of the system under study.

Journal Article↗
PubMed1976

Extended x-ray-absorption fine structure-Auger process for surface structure analysis: Theoretical considerations of a proposed experiment.

A method for surface structure analysis is proposed. The proposed process combines x-ray photoabsorption and Auger electron emission. The extended x-ray-absorption fine structure, occurring for photon energies above an atomic absorption edge, contains structural information of the microscopic environment due to the coupling of the photoelectron final state with the atomic initial state. Measurement of the variations in the intensity of particular Auger lines, as a function of the incident radiation energy, provides a surface sensitive measure of the photoabsorption cross section in the media. Theoretical considerations of the physical processes underlying the proposed experiment and its feasibility, and a discussion of background contributions are presented.

Journal Article↗