Qureshi A A, Manzoor S, Younis H, Shah K H, Ahmed T
Radiation Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan.
Pakistan Stone Development Company, G-8/1, Islamabad, Pakistan.
Radiat Prot Dosimetry. 2018 Jan 1;178(2):143-151. doi: 10.1093/rpd/ncx095.
Natural radioactivity was measured in Bunair Granite using high purity germanium gamma-ray spectrometer and compared to world's granites and building materials to access its suitability for the construction purpose. Average gamma-activities of 226Ra, 232Th and 40K were found to be 52.41, 58.41 and 1130.12 Bq kg-1, respectively. The Indoor and outdoor radiation indices including excessive life-time cancer risk (ELCR) were calculated. The average indoor ELCR was estimated as 3.49 × 10-3. The average outdoor ELCR was assessed as 0.46 × 10-3. As a basic building material Bunair Granite should be on low propriety. For flooring, facing the buildings and as Table tops, in kitchens and other utilities it is safe.
使用高纯锗伽马射线光谱仪对布奈尔花岗岩的天然放射性进行了测量，并与世界上的花岗岩和建筑材料进行比较，以评估其用于建筑目的的适用性。发现镭-226、钍-232和钾-40的平均伽马活度分别为52.41、58.41和1130.12贝可勒尔每千克。计算了包括过量终生癌症风险（ELCR）在内的室内和室外辐射指数。估计室内平均过量终生癌症风险为3.49×10⁻³。评估室外平均过量终生癌症风险为0.46×10⁻³。作为一种基本建筑材料，布奈尔花岗岩的适用性较低。用于地板、建筑物饰面以及厨房和其他设施中的桌面是安全的。
