Liquid Scintillation Counting (LSC) is a measuring technique, broadly applied in environmental monitoring of different radionuclides. One of the possible applications of LSC is the measurement of radon and thoron progeny. There are certain advantages of this method, especially high counting efficiency for alpha and beta particles emitted by radon and thoron progeny. This advantage has been poin...

The results of interpretation monitoring observations radon-220 (thoron) and radon-222 observations, carried out in 2002-2004 on the Northern Tien-Shan, are presented. Prognostic capabilities thoron as a short-term earthquakes precursor shown. It is noted that anomalies more contrast comparison with radon-222. Insufficient explained by methodological seismic radon stations. behavior during eart...

In view of the fact that the radon progeny contribute the highest to the natural radiation dose to general populations, large scale and long-term measurements of radon and its progeny in the houses have been receiving considerable attention. Solid State Nuclear Track Detector (SSNTD) based systems, being the best suited for large scale passive monitoring, have been widely used for the radon gas...

The levels of radon, thoron and their progeny in the dwellings of Northern India have been determined by using twin chamber dosimeter cups. The concentrations of radon and thoron were found to vary from 16.62–155.12 Bq/m and 4.16–24.93 Bq/m. Their progeny concentrations were found to vary from 1.80–16.77 mWL and 0.112–0.674 mWL. The values of life time fatality risk and annual effective dose we...

This report examines how to sample airborne radioactivity with minimal complexity and time expenditure, using conventional high-volume samplers in combination with alpha-particle spectrometry. The use of alpha spectrometry provides compensation for radon/thoron decay products collected on the filter paper of the sampler, leading to a seven-fold improvement in measurement sensitivity of artifici...

Solid-state nuclear track detectors (SSNTDs) in diffusion chambers have been routinely used for long-term measurements of radon gas concentrations. In usual practice, a filter is added across the top of the diffusion chamber to stop the progeny from entering. Thoron can also be deterred from entering the diffusion chamber by using a polyethylene (PE) membrane. However, the thickness of the PE m...

The HMGU thoron experimental house: a new tool for exposure assessment Doses in human organs due to alpha, beta and gamma radiations emitted by thoron progeny in the lung A theoretical study on accurate measurements of thoron with airflow-through scintillation cell method RADIATION PROTECTION DOSIMETRY OCT 2010 141 4 Sp. Iss. SI 448 451 Ishimori, Y Time-integrated monitoring of thoron progeny c...

Radon, an element of natural radiation, is considered one the leading causes lung cancer worldwide. In Bangladesh, radon has been clarified as a foremost source radiation exposure. Potential natural-radiation-induced elevated risks were estimated in Bangladesh previously for population. this survey, very preliminary study country, comparative indoor (222Rn, Rn) and thoron (220Rn, Tn) concentrat...