Spectral Flux Density of Scattered and Primary Radiation Generated at 250 Kv

Abstract

A scintillation spectrometer was used to make absolute measurements of the scattered and primary radiation produced in a water phantom by an X-ray beam. Corrections for the response of the detector were made according to an experimentally-determined response function. Detailed spectral distributions giving the scattered and total radiation are pres- ented in terms of the number flux and the dose in roentgens, for a variety of field sizes and depths. Measurements were made for primary radiations with half value layers of 1.25, 2.20 and 3.20 mm Cu. The quality of the scattered and total radiation expressed as a half value layer in mm Cu was determined from the detailed spectra. A comparison of these results with depth dose data shows close agreement.