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Calculation of double scattering of X‐rays in two scattering geometries for a compressible fluid (argon)
Author(s) -
Wignall G. D.,
Jarvis J. A. J.,
Munsil W. E.,
Pings C. J.
Publication year - 1974
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889874009812
Subject(s) - scattering , argon , radial distribution function , physics , compressibility , function (biology) , computational physics , optics , geometry , atomic physics , mathematics , mechanics , quantum mechanics , evolutionary biology , biology , molecular dynamics
Numerical estimates of double scattering of X‐rays have been made in cylindrical and parallel‐plate geometries for fluid argon in two states. For the cylindrical geometry the ratio of double scattering to single scattering is ~0.01 and independent of scatter angle to a first approximation, and thus does not seriously effect estimates of the radial distribution function. For the parallel‐plate geometry the ratio is to a first approximation linear with angle and increases to ~0.15 at high angles; it thus seriously effects estimates of the radial distribution function and direct correlation function. The ratio can reach very high levels at low scatter angles if primary scattering is low.