Study of natural radioactivity in Mansehra granite, Pakistan: environmental concerns
| Autor: | Ishtiaq A. K. Jadoon, Aziz Ahmed Qureshi, Muhammad Anees, Adil Masood, Ali Abbas Wajid, Abdul Waheed, Ahsan Attique, Shahid Manzoor, Aneela Tubassam |
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| Rok vydání: | 2013 |
| Předmět: |
Veterinary medicine
Light nucleus Radiation Radiological and Ultrasound Technology Geography Thorium Public Health Environmental and Occupational Health Potassium Radioisotopes General Medicine Environmental Exposure Radiation Dosage Silicon Dioxide Effective dose (radiation) Spectrometry Gamma Health hazard Gamma Rays Radiation Monitoring Air Pollution Indoor Environmental science Humans Radiology Nuclear Medicine and imaging Pakistan Radiometry Natural radioactivity Radium |
| Zdroj: | Radiation protection dosimetry. 158(4) |
| ISSN: | 1742-3406 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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