The present paper outlines characteristics of thoron and its progeny in the indoor
environment. Since the half-life of thoron (220Rn) is very short (55.6 s), its behavior is quite …

Radon is a naturally occurring radioactive gas found in rocks, soil, and building materials.
Precisely because of its gaseous nature, it tends to concentrate in indoor environments …

MATERIALS AND METHODS Our previous radon-thoron discriminative detector has several
functional problems. 9 An influence of electrostatics had to be considered because the …

The biological effects of low dose-rate radiation exposures on humans remains unknown. In
fact, the Japanese nation still struggles with this issue after the Fukushima Dai-ichi Nuclear …

The radiation doses from natural radiation sources in Japan are reviewed using the latest
knowledge. The United Nations Scientific Committee on the Effects of Atomic Radiation …

Uncertainty on long-term average radon concentration has a large impact on lung cancer
risk assessment in epidemiological studies. The uncertainty can be estimated by year-to …

Abstract Progeny of 222 Rn and 220 Rn,(212 Pb, 212 Bi, 214 Pb and 214 Bi) are essential to
assess radiological hazard, external and internal doses, residence times and equilibrium …

Indoor radon measurements were carried out in cave dwellings of the Chinese loess plateau
in Gansu province, where previously the Laboratory of Industrial Hygiene (LIH), China, and …

This paper describes importance of 220 Rn (hereafter thoron) progeny measurement for the
dose estimation. Although the spatial distribution of thoron activity concentration strongly …

Although indoor radon was initially measured in the uranium regions of Poli and Lolodorf
using Electret Ionization Chambers, discriminative RADUET detectors were deployed in 70 …