Gamma ray attenuation of high-density concrete of varying heavy and boron-containing aggregates using PHITS
There is a great interest towards the use of modified concrete mixed with a combination of light and heavy elements for improved shielding against ionizing radiation. For this purpose, PHITS simulations were done for Boron Frits-baryte, Colemanite baryte, M-1 and regular concretes to investigate its capability in attenuating gamma rays. Slab thickness for each concrete varies from 5-30 cm, with an increment of 5 cm. The source for the simulation was a Cs-137 with an energy of 0.662 MeV modeled in a stainless steel 361L encapsulation with a NaI (TI) scintillator detector. The attenuation coefficients for Cs-137 and the effective dose with the aforementioned concrete aggregates were compared with the regular concrete which are commonly used today. Results show that M-1 concrete attenuate the gamma radiation most effectively due to its high density and distinct material composition.