NATURAL RADIOACTIVITY MEASUREMENTS IN LOCAL AND IMPORTED COMMERCIAL GRANITES USED AS ORNAMENTAL STONES | ||
| Nuclear Sciences Scientific Journal | ||
| Article 3, Volume 4, Issue 1, 2015, Pages 37-45 PDF (1.21 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/nssj.2015.30836 | ||
| Authors | ||
| ABDEL MOEZ A. SADEK; ABDEL HADI A. ABBAS; ANAS M. EL-SHERIF | ||
| Nuclear Materials Authority,Cairo, Egypt | ||
| Abstract | ||
| 238U, 232Th, 226Ra, and 40K radioactivities were determined in commercial granite samples collected from local market using a NaI (Tl) gamma-ray spectroscopy system. 238 U, 232Th, 226 Ra, and 40 K activity concentrations of the studied commercial granites range between 31 and 351.33 BqKg-1, 22.2 to 102.35 BqKg-1, 22.2 to168.35 BqKg-1 and 881.49 to 1460.67 BqKg-1, respectively. The highest values of activity concentrations of 238U, 226Ra and 40K were recorded in Lahm Mafroum commercial granites. High radioactivity of Lahm Mafroum is attributed to the presence of meta-autonite, zircon, allanite, monazite, sphene and apatite. Absorbed Dose Rate (D), annual effective dose equivalent (AEDE), radium equivalent activity (Raeq), external (Hex) and internal (Hin) hazard index, in addition to activity gamma index (I!) caused by gamma emitting natural radionuclide are determined from the obtained values of 226Ra, 232Th and 40K. Fairly, many of the studied commercial granites do not satisfy the universal standards. | ||
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