Study of Radon Progeny Attachment Suppression

Radon progeny attachment to surfaces plays a critical role in estimating neutron background levels in low-background detectors and assessing human exposure to ionizing radiation. In this study, we systematically examined the attachment rates of key radon decay products: ²¹⁸Po, ²¹⁴Pb, and ²¹⁴Bi under controlled environmental conditions using copper samples. Measurements were conducted in a basement laboratory with radon concentrations reaching up to 400 Bq/m³, both with and without HEPA filtration, to evaluate the suppression of attachment. Environmental parameters affecting the radon progeny attachment were continuously monitored. Surface activities were quantified using alpha spectroscopy. We report the measured attachment lengths and demonstrate the effectiveness of a laminar flow hood in reducing surface deposition. These findings suggest that localized airflow control may provide a cost-effective alternative to full-scale airborne radon mitigation in certain applications.