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Mass Attenuation Coefficients, Effective atomic and Electron Numbers of Alkali Halides for Multi-Energetic Photons

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Author Affiliations

  • 1Department of Physics,Varadha Reddy College of Engineering,Warangal, INDIA
  • 2 Department of Physics, Kakatiya University, Warangal, INDIA
  • 3 CIC, Kakatiya University, Warangal, INDIA

Res. J. Physical Sci., Volume 1, Issue (6), Pages 11-16, July,4 (2013)

Abstract

Mass attenuation coefficients (µm) for alkali halides (RbCl, RbBr and RbI) were determined experimentally using narrow collimated beam transmission method. The samples were irradiated with radioactive point source of different -energies viz. Cs (0.662MeV), Am (0.0595MeV), Co (1.173MeV and 1.332MeV). The transmitted γ - photons were detected and recorded by a NaI(TI) scintillation detector with resolution of 8.5% for 0.662MeV of 137Cs. Theoretical mass attenuation coefficients were estimated using mixture rule. The experimental values reported for all the alkali halides in the present work are compared with the calculated values and the values obtained from X-COM. Linear attenuation coefficient (µ1), total atomic cross-section (σt), electronic cross-section (σe), effective atomic number (Zeff) electron density (Neff) and photon mean free-path (λ) were determined with semi-empirical relations using mass attenuation coefficients obtained experimentally and theoretically. Experimental values of parameters reported for all alkali halides investigated in the present work using different γ -energies are compared with the estimated theoretical data.

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