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    • Keywords


      241Am; γ-ray attenuation; fresh and dried leaf and wood samples; water content; photoelectric effect; mixture rule; rare earth elements; particles of varying size; sand; sugar

    • Abstract


      We have carried out some photon interaction measurements using 59.54 keV γ-rays from a 241Am source. These include γ attenuation studies as well as photoelectric absorption studies in various samples. The attenuation studies have been made using leaf and wood samples, samples like sand, sugar etc., which contain particles of varying sizes as well as pellets and aqueous solutions of rare earth compounds. In the case of the leaf and wood samples, we have used the γ-ray attenuation technique for the determination of the water content in fresh and dried samples. The variation of the attenuation coefficient with particle size has been investigated for sand and sugar samples. The attenuation studies as well as the photoelectric studies in the case of rare earth elements have been carried out on samples containing such elements whose K-absorption edge energies lie below and close to the γ-energy used. Suitable compounds of the rare earth elements have been chosen as mixture absorbers in these investigations. A narrow beam good geometry set-up was used for the attenuation measurements. A well-shielded scattering geometry was used for the photoelectric measurements. The mixture rule was invoked to extract the values of the mass attenuation coefficients for the elements from those of the corresponding compounds. The results are consistent with theoretical values derived from the XCOM package.

    • Author Affiliations


      N Ramachandran1 K Karunakaran Nair2 K K Abdullah3 K M Varier4

      1. Department of Physics, MPMMSN Trust College, Shoranur - 679 523, India
      2. Department of Physics, MES College, Ponnani - 679 586, India
      3. Department of Physics, Farook College, Feroke, Calicut - 673 632, India
      4. Department of Physics, University of Calicut, Malappuram - 673 635, India
    • Dates

  • Pramana – Journal of Physics | News

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