Dependence of albedo factors on mean atomic number for 662 keV gamma photons

The albedo factors (number, energy and dose) of the samples with various mean atomic number have been investigated at a scattering angle of 180 degrees. Fourteen different samples in the mean atomic number range 9.743 <= (Z) over bar <= 83.00 were obtained with bismuth and cellulose powders by using dilution technique. Thus, albedo factors have been investigated in a wide atomic number range. The samples were irritated by 662 keV gamma rays emitted from a Cs-132 radioactive source. The scattered gamma-rays were counted by an HPGe detector with active area of 200 mm(2). It has been observed that albedo factors decrease with increasing mean atomic number. Also, there is a high correlation between albedo factors and mean atomic numbers.