Journal of Medical Physics and Applied Sciences

Experimental Determination of Linear Attenuation Coefficient of Gamma Ray in Zinc Foil at Different Energies

In this work, the spectra of gamma rays resulting from nuclear transitions of 22Na and 137Cs are collected by means of their interaction with matter. By varying the source with fixed distance from the detector and the presence of various thicknesses of absorbers different characteristics about the isotopes can be determined. Linear attenuation coefficient (μ) of gamma rays photons of energy for 0.662, 0.511 and 1.274 MeV in zinc have been determined experimentally through photon-transmission measurement performed under narrow collimated beam counting geometry with scintillation spectrometry as a photon detector. The experimentally obtained values of linear attenuation coefficient found to be in good agreement with the WINXCOM prediction. The Half Value Layer (HVL) and Tenth Value Layer (TVL) were calculated for Zinc foil. Linear attenuation coefficient represent a subject of considerable interest and importance, since it is required in solving various problems in a radiation physics, radiation dosimetry, industrial, biological, agriculture and medical studies.

Author(s):

Mathewos Dawana Desta, Mariam Tessema T, V K Mittal, Damene Darota Amamo

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