Albedo factors of 123, 320, 511, 662 and 1115 keV gamma photons in carbon, aluminium, iron and copperK. U. Kiran, K. Ravindraswami, K. M. Eshwarappa and H. M. SomashekarappaEur. Phys. J. Plus, 131 4 (2016) 87DOI: https://doi.org/10.1140/epjp/i2016-16087-5