Misdaq M A, Chaouqi A, Ouguidi J, Touti R, Mortassim A
*Nuclear Physics and Techniques Laboratory, Faculty of Sciences Semlalia, BP.2390, University of Cadi Ayyad, Marrakech, Morocco (URAC-15 Research Unit Associated to the CNRST, Rabat, Morocco).
Health Phys. 2015 Jun;108(6):592-6. doi: 10.1097/HP.0000000000000285.
Mechanic workers are exposed to exhaust fumes when controlling vehicle engines in motion inside repair shops. To assess radiation doses due to radon short-lived progeny from the inhalation of exhaust fumes by mechanic workers, concentrations of these radionuclides were measured in petrol (gasoline) and gas-oil exhaust fumes by evaluating mean critical angles of etching of the CR-39 and LR-115 type II SSNTDs for alpha particles emitted by the radon and thoron decay series. Committed effective doses due to ²¹⁸Po and ²¹⁴Po short-lived radon decay products from the inhalation of petrol and gas-oil exhaust fumes by workers were evaluated. A maximum value of 1.35 mSv y⁻¹ due to radon short-lived decay products from the inhalation of gas-oil exhaust fumes by mechanic workers was found, which is lower than the (3-10 mSv y⁻¹) dose limit interval for workers.
机械工人在维修店内控制运转中的车辆发动机时会接触到废气。为评估机械工人吸入废气中氡的短寿命子体所致的辐射剂量，通过评估CR - 39和II型LR - 115固体径迹探测器对氡和钍射气衰变系列发射的α粒子蚀刻的平均临界角，测量了汽油和柴油废气中这些放射性核素的浓度。评估了工人吸入汽油和柴油废气中²¹⁸Po和²¹⁴Po等氡短寿命衰变产物所致的待积有效剂量。发现机械工人吸入柴油废气中氡的短寿命衰变产物所致的最大剂量值为1.35 mSv y⁻¹，低于工人的剂量限值区间（3 - 10 mSv y⁻¹）。
