Radiation evaluation of household appliances and stone materials from residences in Hangzhou

Abstract The electromagnetic radiation of household appliances and radioactivity stone materials from residences were determined using integrated magnetometer γ-ray spectrometer techniques. levels desktop computers greater than that notebook computers, while microwave ovens induction cookers produced low-frequency fields during the operation. safety distances for hair drier, desk lamp, patch board ca . 50 cm, whereas those rest 30 cm. Radioactive tests stones collected certain regions conducted. specific activities 226 Ra, 232 Th, 40 K used to calculate internal exposure indexes ( I Ra ) external γ ). Moreover, both wall coatings putty < tile adhesive, thereby bathroom furniture ceramic facet pottery basin flush toilet. Natural radionuclides widely exist in interior decorations, indicating humans open radioactive environments receive background all time.