id author title date pages extension mime words sentence flesch summary cache txt iajs-2815 Jassem Kadhim, Mothana; Ahmed Ebrahiem, Sameera Measuring the Concentration of Radon Gas in Book Stores in Primary Schools in Diyala Governorate 2022 9 .pdf application/pdf 2820 161 70 ρ: density of the tracks in the unit (track/mm2) Calculation of radon gas concentration and some other related quantities : 1- Radon gas concentration can be calculated through the following equation[4][12]: 𝐢𝑅𝑛 = 𝜌π‘₯ 𝐾 .𝑑 (2) 53 (3)2022 63 Figure (8) shows the linear relationship of radon gas concentration with lung cancer cases, as the higher the radon gas concentration, the more lung cancer cases. cache/iajs-2815.pdf txt/iajs-2815.txt