title: Monte Carlo simulation of photon buildup factors for shielding materials in diagnostic x-ray facilities.
abstract: OBJECTIVE
  A simulation of buildup factors for ordinary concrete, steel, lead, plate glass, lead glass, and gypsum wallboard in broad beam geometry for photons energies from 10 keV to 150 keV at 5 keV intervals is presented.
  
  
  METHODS
  Monte Carlo N-particle radiation transport computer code has been used to determine the buildup factors for the studied shielding materials.
  
  
  RESULTS
  An example concretizing the use of the obtained buildup factors data in computing the broad beam transmission for tube potentials at 70, 100, 120, and 140 kVp is given. The half value layer, the tenth value layer, and the equilibrium tenth value layer are calculated from the broad beam transmission for these tube potentials.
  
  
  CONCLUSIONS
  The obtained values compared with those calculated from the published data show the ability of these data to predict shielding transmission curves. Therefore, the buildup factors data can be combined with primary, scatter, and leakage x-ray spectra to provide a computationally based solution to broad beam transmission for barriers in shielding x-ray facilities.
authors.affiliation: Ecole Supérieure des Sciences et Techniques de la Santé de Monastir, Monastir, Tunisia. Hedi_Kharrati@yahoo.fr
authors.forename: Hedi
authors.initials: H
authors.lastname: Kharrati
authors.forename: Amel
authors.initials: A
authors.lastname: Agrebi
authors.forename: Mohamed Karim
authors.initials: MK
authors.lastname: Karoui
mesh_terms: D002133:Calcium Sulfate; D003252:Construction Materials; D005898:Glass; D009010:Monte Carlo Method; D017785:Photons / Q000009:adverse effects; D011835:Radiation Protection / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*
chemical_list: D002133:Calcium Sulfate