Dispersion corrections to the forward Rayleigh scattering amplitudes of tantalum, mercury and lead derived using photon interaction cross sections

Appaji Gowda, S. B. and Umesh, T. K. and Appaji (2006) Dispersion corrections to the forward Rayleigh scattering amplitudes of tantalum, mercury and lead derived using photon interaction cross sections. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 243 (1). 2 - 5.

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Abstract

Dispersion corrections to the forward Rayleigh scattering amplitudes of tantalum, mercury and lead in the photon energy range 24–136keV have been determined by a numerical evaluation of the dispersion integral that relates them through optical theorem to the photo effect cross sections. The photo effect cross sections have been extracted by subtracting the coherent and incoherent scattering contribution from the measured total attenuation cross section, using high-resolution high-purity germanium detector in a narrow beam good geometry set up. The real part of the dispersion correction to which the relativistic corrections calculated by Kissel and Pratt (S-matrix approach) or Creagh and McAuley (multipole corrections) have been included are in better agreement with the available theoretical values.

Item Type: Article
Uncontrolled Keywords: Photo effect, Dispersion corrections ′ and ″
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: lpa manjunath user
Date Deposited: 04 Sep 2019 10:28
Last Modified: 23 Dec 2019 10:22
URI: http://eprints.uni-mysore.ac.in/id/eprint/7563

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