Abstract：The filtered X-ray reference radiation of high air kerma rate series recommended by ISO 4037 was selected as the research object, the reasonable half-value layer measurement experiment was designed, the values of the first and second half-value layers were obtained and the homogeneity coefficient was calculated. For the established radiation quality, the filtered X-ray energy spectrum was measured by HPGe spectrometer, then the measured pulse height spectrum was processed and converted to calculate the average energy. According to the attenuation law of X-ray in the material aluminum and copper, A single-energy X-ray attenuation curve was fitted to calculate the effective energy of the series of the filtered X-rays. The measured and calculated results were compared with the recommended values, and both are in good agreement.
2019, Vol. 29 