Speaker
Description
Authors (affiliation): 1. Minji Han (KRISS, South Korea, UST, South Korea), 2. Sanghoon Hwang (KRISS, South Korea, UST, South Korea), 3. A. Agusbudiman (KRISS, South Korea, UST, South Korea, BATAN, Indonesia), 4. J.M. Lee (KRISS, South Korea, UST, South Korea), 5. K.B. Lee (KRISS, South Korea, UST, South Korea), 6. B.C. Kim (KRISS, South Korea), 7. D.H. Heo (KRISS, South Korea).
Korea Research Institute of Standards and Science (KRISS) has developed beta-gamma coincidence system with 4πβ(LS)-γ, 4πβ(PPC)-γ and 4πβ(3PM-LS)-γ. Recently, 4πβ(LS)-γ(LaBr3) coincidence system has developed with a digital DAQ system based on the Flash-ADC (FADC). The 4πβ(LS)-γ(LaBr3) coincidence system showed good performance for long half-life nuclide with the 60Co pilot experiment, and the potential for use as a primary system. The digital DAQ system has been used in the BIPM.RI(II)-K4 (SIRTI) as the short half-life nuclei since the high count rates compared with an analog DAQ. In this presentation, a 4πβ(PPC)-γ(NaI) with digital DAQ is introduced. A Co-60 source on the thin film has been measured to optimize the high voltage and the operating ionizing gas pressure. The pilot experiment with the Co-60 source has been performed. The maximum efficiency with the Co-60 source is found to be 94.8 %, it has higher efficiency compared with 92 % of LS system. The activity is estimated to be (3375.78 ± 58.10) Bq and the activity is good agreement with the reference ionizing chamber. In this presentation, preliminary results of the 4πβ(PPC)-γ(NaI) will be discussed.
