Ever since studies on uranium miners established the presence of a positive risk coefficient for the occurrence of lung cancer in miners exposed to elevated levels of 222Rn and its progeny, there was a great upsurge of interest in the measurement of 222Rn in the environment and considerable data is generated on the levels of 222Rn in the environment across the worlds and is periodically ...

Abstract The “powder sandwich” method was adapted to the measuring equipment at Laboratory of Radiometric Expertise, IFJ PAN (Kraków, Poland). versatility has been confirmed. values thoron emanation coefficients (f) for 16 materials have determined. It found that value coefficient is not directly dependent on concentration 224 Ra, other factors are also important, e.g. size grains, inter-grain ...

Bài báo nghiên cứu đặc điểm biến động suất liều bức xạ gamma và nồng độ khí phóng radon (222Rn; 220Rn) theo thời gian tại trạm quan trắc môi trường mỏ đất hiếm Mường Hum. Sử dụng phương pháp thống kê để xử lý số liệu gamma, trắc. Kết quả của giúp điều chỉnh sự thiên ngày đêm giá trị trung bình hàng năm khi tính toán hiệu năm. khảo sát 2021 Hum với Radon, Thoron lần lượt là 1,65 1,97.

n 1987 the International Agency for Research of Cancer (IARC) evaluated radon and its decay products as human carcinogens (1). Large epidemiologic studies conducted in Western Europe in the Õ90s showed that this radioactive gas accounted for 50 to 90% of a radiological dose (2). Very high residential concentrations of radon were measured in Sweden and Finland (3-5). They were 5,000 times higher...