Results 181 to 190 of about 10,473 (258)

Soil and air radon/thoron exhalation rates and radon activity concentrations in the vicinity of Lake Monoun, West region of Cameroon

International Journal of Environmental Analytical Chemistry, 2023
One crucial element to determine the radon amount in the environment is the rate at which radon is exhaled from the subsurface. To assess the radon and thoron potential exhalation in the vicinity of Monoun Lake in the West Region of Cameroon, 28 soil ...
Felix Haman, Cebastien Joel Guembou Shouop, David Kpeglo Okoh, D. Bongue, Dorine Flore Tiomene, Patricia-Laurelle Degbe, D. Gondji, Maurice Ndontchueng Moyo, M. G. Kwato Njock   +8 more
semanticscholar   +1 more source

Assessment of radiological risk associated with thoron gas at primary schools in Al-Najaf city, Iraq.

Applied Radiation and Isotopes, 2023
Children spend considerable time at home and school, so school is likely to be a second source of natural radionuclide exposure after home. This study evaluates the radiological risk associated with thoron gas in the air within the building of one ...
Rukia Jaber Dosh, A. Abojassim
semanticscholar   +1 more source

Time-frequency analysis of radon and thoron data using continuous wavelet transform

Physica Scripta, 2023
Continuous exposure to environmental radiation, whether it derives from natural or artificial sources, is thought to pose a substantial risk to public health.
Awais Rasheed, M. Osama, M. Zubair Rafique, Aleem Dad Khan Tareen, Kashif Lone, S. A. Qureshi, Kim J Kearfott, Aftab Alam, Dimitrios Nikolopoulos   +8 more
semanticscholar   +1 more source

Impact of humidity and flowrate on the thoron measurement sensitivity of electrostatic radon monitors

Journal of Radiological Protection, 2023
The accurate measurement of thoron activity concentration is an important issue in both thoron exposure evaluation and in reducing its influence on radon measurement.
Chunyu He, Hao Wang, Lei Zhang, Q. Guo
semanticscholar   +1 more source

Thoron standard source

Applied Radiation and Isotopes, 2019
Thoron (220Rn) has been identified as a possible health concern in specific places such as monazite processing plants and (rare-earth) mines. The short half-life of thoron (55.8 s) makes thoron calibration sources and thoron chambers less common than the corresponding radon (222Rn) ones.
Robert, Lindsay, Elmughera, Elhag, Robert J, de Meijer, Joash N, Ongori, Peane P, Maleka   +4 more
openaire   +2 more sources

Thoron and thoron progeny measurements in German clay houses

Radiation Protection Dosimetry, 2014
In recent years, elevated thoron concentrations were found in houses built of unfired clay. In this study experiments were carried out in 17 traditional and modern clay houses in Germany to obtain an overview of indoor thoron in such houses. Long-term measurements over an 8-week period were performed using a newly developed Unattended Battery-Operated ...
S, Gierl, O, Meisenberg, P, Feistenauer, J, Tschiersch   +3 more
openaire   +2 more sources

Characteristics of thoron and thoron progeny in Canadian homes

Radiation and Environmental Biophysics, 2010
Naturally occurring isotopes of radon in indoor air are identified as the second leading cause of lung cancer after tobacco smoking. Radon-222 (radon gas) and radon-220 (thoron gas) are the most common isotopes of radon. While the radon equilibrium factor is well established, the equilibrium factor between thoron progeny and thoron gas is still not ...
Jing, Chen, Deborah, Moir, Atsuyuki, Sorimachi, Shinji, Tokonami   +3 more
openaire   +2 more sources

Evaluation of Radiation Hazards Created by Thoron and Thoron Daughters

American Industrial Hygiene Association Journal, 1960
In estimating the relative hazards created by the inhalation of thoron and thoron daughters, certain assumptions were required because of the incomplete knowledge of the biological behavior of these elements or were employed to simplify the calculations.
R L, BLANCHARD, D A, HOLADAY
openaire   +2 more sources

INADEQUACY OF THORON DOSE CALCULATIONS FROM THORON PROGENY MEASUREMENT ALONE

Radiation Protection Dosimetry, 2016
To determine the dose received by thoron (220Rn) domestically, conventional methods measure the activity concentration of thoron progeny only (namely the 212Pb atoms) and calculate the dose by using a set of conversion factors. This may be due to the measurement of progeny being simpler since it is longer lived and will be evenly spread throughout the ...
D, Lane-Smith, F K, Wong
openaire   +2 more sources

CFD modelling of thoron and thoron progeny in the indoor environment

Radiation Protection Dosimetry, 2011
Thoron (220Rn) exhalation from building materials has become increasingly recognised as a potential source for radiation exposure in residences. However, contrary to radon (222Rn), limited information on thoron exposure is available. The purpose of this study is to estimate the concentration of thoron and its progeny products in a typical Dutch living ...
G, de With, P, de Jong
openaire   +2 more sources