Amrane M, Oufni L, Misdaq M A
Nuclear Physics and Techniques Laboratory, Faculty of Sciences Semlalia, University Cadi Ayyad, BP. 2390, Marrakech, Morocco.
Department of Physics, Faculty of Sciences and Techniques (LPMM-ERM), University Sultan Moulay Slimane, B.P. 523, Beni-Mellal 23000, Morocco
Radiat Prot Dosimetry. 2014 Dec;162(3):400-9. doi: 10.1093/rpd/nct338. Epub 2014 Jan 2.
The authors developed a model for determining the alpha- and beta-activities per unit volume of air due to radon ((222)Rn), thoron ((220)Rn) and their decay products attached and unattached to the aerosol in the outdoor air at the workplace in natural conditions at different locations in Morocco by using both CR-39 and LR-115 type II solid-state nuclear track detectors. In addition, the percentage of (218)Po, (214)Pb and (214)Po radionuclides attached to the aerosols and the unattached fraction f(j) for different values of the attachment rate were evaluated. Radon and thoron concentrations in outdoor air of the studied different locations were found to vary from 9.20±0.8 to 16.30±1.50 Bq m(-3) and 0.22±0.02 to 1.80±0.20 Bq m(-3), respectively. The committed equivalent doses due to the radon short-lived progeny (218)Po and (214)Po attached and unattached to the aerosol air were evaluated in different tissues of the respiratory tract of the members of the public from the inhalation of outdoor air.
作者通过使用CR - 39和LR - 115 II型固态核径迹探测器，建立了一个模型，用于确定在摩洛哥不同地点自然条件下工作场所室外空气中氡（(222)Rn）、钍射气（(220)Rn）及其附着和气态的衰变产物每单位体积空气的α和β活度。此外，还评估了附着在气溶胶上的(218)Po、(214)Pb和(214)Po放射性核素的百分比以及不同附着率值下的气态分数f(j)。研究发现，不同地点室外空气中氡和钍射气的浓度分别在9.20±0.8至16.30±1.50 Bq m(-3)和0.22±0.02至1.80±0.20 Bq m(-3)之间变化。通过吸入室外空气，评估了公众呼吸道不同组织中由于附着和气态的氡短寿命子体(218)Po和(214)Po所致的待积当量剂量。
