Qureshi Aziz Ahmed, Jadoon Ishtiaq Ahmed Khan, Wajid Ali Abbas, Attique Ahsan, Masood Adil, Anees Muhammad, Manzoor Shahid, Waheed Abdul, Tubassam Aneela
Radiation Physics Laboratory, Physics Department, COMSATS Institute of Information Technology, Chak Shahzad, Park Road, Islamabad, Pakistan.
Radiat Prot Dosimetry. 2014 Mar;158(4):466-78. doi: 10.1093/rpd/nct271. Epub 2013 Oct 31.
A part of Mansehra Granite was selected for the assessment of radiological hazards. The average activity concentrations of (226)Ra, (232)Th and (40)K were found to be 27.32, 50.07 and 953.10 Bq kg(-1), respectively. These values are in the median range when compared with the granites around the world. Radiological hazard indices and annual effective doses were estimated. All of these indices were found to be within the criterion limits except outdoor external dose (82.38 nGy h(-1)) and indoor external dose (156.04 nGy h(-1)), which are higher than the world's average background levels of 51 and 55 nGy h(-1), respectively. These values correspond to an average annual effective dose of 0.867 mSv y(-1), which is less than the criterion limit of 1 mSv y(-1) (ICRP-103). Some localities in the Mansehra city have annual effective dose higher than the limit of 1 mSv y(-1). Overall, the Mansehra Granite does not pose any significant radiological health hazard in the outdoor or indoor.
选取了曼塞赫拉花岗岩的一部分用于评估放射性危害。发现镭 - 226、钍 - 232和钾 - 40的平均活度浓度分别为27.32、50.07和953.10 Bq kg⁻¹。与世界各地的花岗岩相比，这些值处于中位数范围。估算了放射性危害指数和年有效剂量。除了室外外照射剂量（82.38 nGy h⁻¹）和室内外照射剂量（156.04 nGy h⁻¹）高于世界平均本底水平51和55 nGy h⁻¹外，所有这些指数均在标准限值内。这些值对应的平均年有效剂量为0.867 mSv y⁻¹，低于1 mSv y⁻¹的标准限值（国际放射防护委员会第103号出版物）。曼塞赫拉市的一些地区年有效剂量高于1 mSv y⁻¹的限值。总体而言，曼塞赫拉花岗岩在室外或室内不会造成任何重大的放射性健康危害。
Zotero 插件