Experimental investigation of multiple scattering of 662 keV gamma rays in zinc at 90°

Gurvinderjit SINGH, Manpreet SINGH, B. S. SANDHU, Bhajan SINGH

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Abstract

Compton scattering investigations usually examine the case when photon has undergone only one Compton collision in the sample. The probability of a photon being scattered several times may be significant for a target of finite dimensions both in depth and lateral dimensions. The present experiment is undertaken to study the intensity and energy distributions of 662 keV gamma rays multiply scattered from a zinc target of various thicknesses at a scattering angle of 90° with the scattered photons being detected by an HPGe gamma detector. We observe that with an increase in target thickness, the number of multiply scattered photons also increases and saturates at a particular value of the target thickness (saturation depth). This supports the work of Paramesh, L., Venkataramaih, L., Gopala, K., Sanjeevaih, H. [1983. Z-dependence of saturation depth for multiple scattering of 662 keV photons from thick samples. Nucl. Instrum. Methods 206, 327-230]. The double Compton scattered peak is also observed in the experimental spectra, with a position in agreement with the predictions of Fernandez, J.E. [1991. Compton and Rayleigh double scattering of unpolarized radiation. Phys. Rev. A44, 4232-4248] and Barnea, G., Dick. C.E., Ginzburg. A.E., Seltzer. S.M. [1995. A study of multiple scattering background in Compton scatter imaging. NDT E Int. 28. 155-162]. Copyright © 2006 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)750-758
JournalRadiation Physics and Chemistry
Volume76
Issue number5
Early online dateOct 2006
DOIs
Publication statusPublished - May 2007

Citation

Singh, G., Singh, M., Sandhu, B. S., & Singh, B. (2007). Experimental investigation of multiple scattering of 662 keV gamma rays in zinc at 90°. Radiation Physics and Chemistry, 76(5), 750-758. doi: 10.1016/j.radphyschem.2006.08.010

Keywords

  • Compton scattering
  • Multiple scattering
  • Saturation depth
  • Multiply scattered fraction
  • Double Compton peak

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