Retrospective radon dosimetry

Knowledge of the precise life-time radon history in houses is essential for epidemiologists, mitigation professionals and house-owners. For radon dosi metry and to make a reasonable health-risk study similar information about the indoor aerosol environment is necessary. For this purpose a combined da ta analysis from measurements of the Po-210 activity implanted in glass-sur faces as well as trapped in spongy materials is proposed. This analysis tec hnique provides a characterization of the average indoor aerosol-particle e nvironment. As a consequence, a radon dose estimation improves by a factor of about 3 compared to the commonly applied single surface-activity analysi s.