1. National Institute of Metrology, Beijing 100029, China
2. Lanzhou University, Lanzhou, Gansu 730000,China
3. Beijing Normal University, Beijing 100011, China
Abstract：In order to reproduce the magnitude of the absorbed dose of β-ray tissue, the radiation field based on 90Sr/90Y and 85Kr sources and the extrapolated ionization chamber parameters, as well as the related correction factors of the extrapolated ionization chamber, were obtained through experiments and simulation calculations, and flattening was achieved. The magnitude of the tissue absorbed dose rate under the filter condition was reproduced. It provides a basis for the subsequent participation in the international comparison of β-particle raidation doses and the transfer of β-particle raidation personal dose equivalents Hp(0.07).
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2023, Vol. 44 
