校正用蛍光Ｘ線照射場の確立

Abstract

For the purpose of the calibration and the energy response test, etc. of radiation measuring instruments in a low-energy region (8-75keV), the calibration fluorescent X-ray generator has been constructed to provide the suitable fluorescent X-ray calibration field. And further, its characteristics have been studied.The fluorescent X-ray spectra of radiators of Cu, Mo, Sn, Er, W, Au and Pb were measured with a high purity Ge detector. The fluorescent X-ray exposure rate were measured with standard ionization chamber. Maximum exposure rate at 80cm from radiator is about 2.58×10-5C/kg/h (100mR/h) when Sn and Ag are used as the radiator and filter respectively. The influences of scattered X-ray from radiator on the fluorescent X-rays exposure rate was less than 10%.