Comparisons inhomogeneity of photon fields and backscatter factors for PMMA and water slab phantoms

The dose rate distributions of photon fields for calibrating personal dosemeters are measured free-in-air and in front of the PMMA and water phantoms. The backscatter factors and relative inhomogeneity of photon fields at both of phantoms are compared. From radiation protection aspect, for the hospital staff at Roentgen diagnostics, we have discussed the preferences and defects on the occasion of use for everyone of phantoms separately. It turned out that in to give the objective opinion for occupational health, we have to consider to the positioning of the personnel dosemeter during their calibration in photon fields X-ray apparatus of the Standard Dosimetry Laboratory. (author)