[2A07-09] Radiation-dose Measurement

[2A07] Calibration of survey meters in soft x-ray radiation field below 5keV

＊Masahiro Kato¹, Tadahiro Kurosawa¹, Toshihiko Hino², Yoshinori Inagaki² (1.AIST, NMIJ, 2.Hamamatsu Phononics K.K.)

Keywords:soft x-ray, survey meter, extrapolation chamber, calibration

Two conventional suevey meters have been calibrated in soft x-ray radiation filed with the photon energy below 5 keV produced from an electrostatic remover (L12536, Hamamatsu Photonics K.K.). The extrapolation chamber (C112-A, Applied Engineering inc.), which is use as the primary standard for beta dosimetry in National Metrology Institute of Japan, is used as the measurement standard. The uncertainty of the calibration factor of the survey meters was 4.1 % with the coverage factor k=2.