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Updated: Mar 28, 2026

Nanoparticle Tracking Analysis of Gold Nanoparticles in Aqueous Media through an Inter-Laboratory Comparison
Published on: October 20, 2020
Absolute measurement of (198)Au activity in gold foil using plastic scintillators and a well-type NaI(Tl) detector
Yun Ho Kim1, Jungho Kim2, Jong-Man Lee2
1Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea; Department of Nuclear Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
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.
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