title: Absolute measurement of (198)Au activity in gold foil using plastic scintillators and a well-type NaI(Tl) detector.
abstract: A beta-gamma coincidence system has been developed for measuring (198)Au activity in gold foils. The system was validated by Monte Carlo simulations and by measuring the activity of a (60)Co point-source. To study effects such as self-shielding of beta particles in gold foils, (198)Au activity measurements and simulations were performed for various scintillators and foil sizes. The measured (198)Au activities were ~1% above the reference activity, which might be due to self-shielding of beta particles. The measured and simulated (198)Au activities agreed, suggesting feasibility of precise activity measurement.
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea; Department of Nuclear Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors.forename: Yun Ho
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea.
authors.forename: Jungho
authors.initials: J
authors.lastname: Kim
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea.
authors.forename: Jong-Man
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea. Electronic address: hyeonseo@kriss.re.kr.
authors.forename: Hyeonseo
authors.initials: H
authors.lastname: Park
keywords: (198)Au; Beta–gamma coincidence counting; Geant4; Thermal neutron field