关键词: LAgDC, NDAS, ⁶⁰Coγ射线辐照场;, 剂量分布, 剂量跟踪

Abstract: In order to make the ⁶⁰Co gamma irradiation device run normally, the dosimetry system was calibrated, the dose of the irradiation field of the gamma irradiation device was measured, and the dose tracking of the irradiated products was carried out. The results show that the standard deviation of background value of low range silver dichromate dosimeter is less than 0.3% in 3 years, and the measurement deviation of NDAS ratio is within ±3%, which is consistent with the measurement results of national metrology institute. When the three layers of radioactive sources are arranged, the dose inhomogeneity is 1.12 in the vertical direction, which is uniform distribution. The horizontal dose rate distribution shows that The closer it get to the source plate, the higher the dose rate is,the faster the dose rate decreases; The farther away from the source plate, the lower the dose rate is, the slower the dose rate decreased. and which is non-uniform distribution. The absorbed dose distribution in the box of Guyanling granule was high at both ends and low in the middle, and the inhomogeneity was 1.38. The minimum dose point dose in the product box is 1.00 kGy, which is the key parameter of product irradiation dose controlhas.

Key words: LagDC, NDAS, ⁶⁰Co gamma irradiation field, dose distribution, dose tracking