International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 6, June 2017

International Journal of Science and Technology

Determination of Photon Ambient Dose Buildup Factors for Radiological Applications for Points and Plaque Source Configurations Using MCNP5

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Author P. Deatanyah, C.C. Arwui, S. Wotorchi- Gordon, H. Lawluvi, D. O. Kpeglo, J. Ankaah, G. Emi-Reynolds, E. O Darko
On Pages 174-178
Volume No. 1
Issue No. 5
Issue Date November 01, 2011
Publishing Date November 01, 2011
Keywords Monte Carlo method; Ambient dose equivalent; Buildup factors; MCNP5 code; Radiation shielding.


Photon ambient dose equivalent buildup factors were calculated for point and plaque isotropic cobalt-60 and cesium-137 radioactive sources irradiating a finite slab shield materials of ordinary concrete, barite concrete, lead, lead glass and water using MCNP5 code. Studied shield thickness ranged from 1 to 15 mean free paths (mfp). A variance reduction technique available in the code was used to reach accurate results. These results are suitable for photon shielding and dosimetry calculations. It was concluded that for the same shield thickness and photon energy, the ambient dose equivalent of a plaque source configuration is higher than that of a point source configuration.

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