Abstract
Abstract A description is given of the K fluorescent X-rays, heavily filtered X-ray beams, and isotope gamma rays used at the Los Alamos X-Ray Facility to measure the energy response of radiation detectors over an energy range of 10–1000 keV. Methods of determining beam alignment, size and uniformity are discussed. Exposure, filtration, and spectral measurements of the sources are presented. K X-ray yield and purity in terms of photons, ergs and roentgens are given as a function of accelerating potential. Methods of improving yield and purity are discussed; filter thicknesses which reduce L X-ray intensity to 0.1%, Kbeta filter thicknesses which reduce Kbeta/Kalfa ratios to 0.02, and radiator thicknesses which give maximum fluorescence are calculated. Included are energy response measurements of some typical commercial radiation detectors.
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