Measurement of Continuous X-ray Spectra with a Scintillation Spectrometer

Measurements have been made with a scintillation spectrometer of the spectral distribution of primary radiation from a 280 kVp X-ray machine for H.V.L.s of 1·7, 2·5 and 3·1 mm of copper. The measured distributions have been corrected for crystal and photomultiplier effects using measured spectra for monochromatic radiation. The corrected distributions have been compared with those obtained by analysis of absorption data.