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The European Physical Journal D

, Volume 55, Issue 1, pp 23–33 | Cite as

Elastic scattering of \(\sf{59.54}\)-keV \(\sf{\gamma}\)-rays in elements with \(\sf{22 \leq {Z} \leq {92}}\) at momentum transfer \(\sf{0.4 \leq {x} \leq 4.7~{\AA}^{\sf -1}}\)

  • S. Kumar
  • V. Sharma
  • J. S. Shahi
  • D. Mehta
  • N. SinghEmail author
Atomic Physics

Abstract

Differential cross sections for elastic scattering of the 59.54 keV γ-rays in elements with 22 ≤Z ≤92 have been measured over the angular range 10–160corresponding to the momentum transfer 0.4 ≤x ≤4.7 Å-1. The measurements at forward and backward angles were performed using the 241Am radioactive point-source, target and the Ge detectors in the transmission and reflection arrangements, respectively. The measured differential scattering cross sections are compared with those based on the form-factor (FF) formalism and state-of-the-art S-matrix calculations to differentiate between their relative efficacies and to check angular-dependence of the anomalous scattering factors (ASF) incorporated as correction to the modified form-factor (MF). The S-matrix values exhibit agreement with the measured data at backward angles and differences ∼10% at forward angles. The scattering cross sections based on the MF including ASF’s are in general lower at various angles by up to 20% for medium- and high-Z elements. The observed deviations being higher at the forward angles infer possibility of angular-dependence of ASF’s.

PACS

82.50.Kx Processes caused by X-rays or gamma-rays 34.50.-s Scattering of atoms and molecules 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • S. Kumar
    • 1
  • V. Sharma
    • 1
  • J. S. Shahi
    • 1
  • D. Mehta
    • 1
  • N. Singh
    • 1
    Email author
  1. 1.Department of PhysicsPanjab UniversityChandigarhIndia

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