Eur. Phys. J. D 7, 45-53 (1999)
https://doi.org/10.1007/s100530050346

Atomic Rayleigh scattering cross-sections and the associated anomalous dispersion in the X-ray regions

¹ Department of Physics, Sir. C.R.R. Autonomous College, C.R.R. Institutions, Eluru-534007, W.G. Dt., A.P., India and The Abdus Salam International Center for Theoretical Physics, 34100 Trieste, Italy
² Istituto di Matematica e Fisica, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy
³ Dipartimento di Fisica, Università di Roma La Sapienza, P.le A. Moro 2, 00185 Roma, Italy

Received: 27 January 1998
Revised: 4 January 1999
Published online: 15 August 1999

Abstract

Elastic scattering cross-sections for Pd, Ag, Cd, In, Sn, Sb, Pt, Au and Pb are measured at an angle of 90° in the X-ray region 5.41  keV. These energies fall between the high-energy side of the L- and M-shell absorption edges of the atoms considered. The present atomic region is significant for solid X-rays to assess the contribution of resonance and solid-state environmental effects. Also it is the anomalous scattering region for many of the atoms of the periodic table. Experimental results are compared with theoretical calculations based on form factor formalisms including the anomalous corrections and available recent S-matrix values. Based on the experimental evidence, the present results indicate the influence of solid-state environmental effects, the importance of anomalous corrections nearer to absorption edges, the correctness of revised high-energy limit values, the superiority of S-matrix predictions over form factor values on measured elastic scattering cross-sections in the X-ray regime and also show the resonance behavior around K, L and M absorption edges.