1. Development of a Method to Measure Trace Levels of Uranium and Thorium in Scintillation Films.
- Author
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Ichimura, K, Chiba, K, Gando, Y, Ikeda, H, Kishimoto, Y, Kurasawa, M, Nemoto, K, Sakaguchi, A, Takaku, Y, and Sakakieda, Y
- Subjects
THORIUM isotopes ,URANIUM ,INDUCTIVELY coupled plasma mass spectrometry ,THORIUM ,POLYETHYLENE films - Abstract
We have established a method to measure picograms-per-gram (pg g
−1 ) levels of238 U and232 Th in scintillation films by combining the dry ashing method and inductively coupled plasma mass spectrometry. Trace amounts of238 U and232 Th were measured in up to 2 g of scintillation film with almost 100% collection efficiency. This paper details the experimental procedure, including the pretreatment of the samples and labware, detection limit of the method, collection efficiencies of238 U and232 Th, and measurement of238 U and232 Th in a polyethylene naphthalate film. This method is also applicable to238 U and232 Th measurements in other low-background organic materials for rare-event search experiments. [ABSTRACT FROM AUTHOR]- Published
- 2024
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