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Forensic Science & Addiction Research

Behaviour Analysis of Indoor Radioactive Aerosols

  • Open or CloseChutima Kranrod and Shinji Tokonami*

    Institute of Radiation Emergency Medicine, Hirosaki University, Japan

    *Corresponding author:Shinji Tokonami, Institute of Radiation Emergency Medicine, Hirosaki University, 036-8564, Aomori, Japan

Submission: July 06, 2023;Published: July 17, 2023

DOI: 10.31031/FSAR.2023.06.000637

ISSN: 2578-0042
Volume6 Issue2


The deposition of radioactive aerosols from radon daughter, which are potentially harmful to human health. The inhalation of short-lived radon decay products (RnPs) yields the greatest contribution to natural radiation exposure. This research deals with a study carried out to improve the knowledge of the behaviour of RnPs, their interaction with particulates and the plate-out during the time. The tests confirmed that a high aerosol particle concentration increases the probability that an ion sticks to aerosol and remains long in the air, leading to both an increase in equilibrium factor (F) and a decrease of unattached fraction (fp). The results performed in a radon calibration chamber (free of particles) showed a reduction of F (and the average of ~ 0.1 %) because in an environment the plate-out phenomenon prevails over the attachment to particulate. Besides, the high circulation fan speed (~2.9 ms-1) in the radon calibration chamber has been a more significant effect on the plate-out of attached radon progeny (~0.040±0.002 Bq cm-2h-1).

Keywords:Radon decay products; Plate-out; EERC

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