원문정보
초록
영어
The concentration of the naturally occurring radionuclides 226Ra, 232Th and 40K have been measured in Clay (C), gypsum (G), limestone (L), sand (S), brick (B), soil (So), cement (Ce), which are used as building materials in Assiut, Egypt, using gamma spectrometry employing a 3×3 inch scintillation NaI (Tl) detector. The radium equivalent activity (Raeq), indoor gamma absorbed dose rate (D), annual effective dose (An), (AUI), alpha index (Iα), gamma index (Iγ), external radiation hazard index (Hex), internal radiation hazard index (Hin), representative level index (RLI), excess lifetime cancer risk (ELCR) and annual gonadal dose equivalent (AGDE) associated with the natural radionuclides are calculated to assess the radiation hazard of the natural radioactivity in the building materials. Basic statistics (skewness and Kurtosis) and frequency distributions for all radionuclides were used to describe the statistical characteristics of the radionuclide activities.
목차
1. Introduction
2. Materials and Methods
2.1. Sampling and Sample Preparation
2.2. Gamma-Ray Spectroscopic Technique
3. Results and Discussion
3.1. Radionuclide Activity Concentrations
3.2. Radium Equivalent Activities (Raeq)
3.3. Representative Level Index (RLI)
3.4. Absorbed Gamma Dose Rate (D)
3.5. Annual Effective Dose (E)
3.6. Alpha Index (Iα) and Gamma Index (Iγ)
3.7. External and Internal Hazard Indices
3.8. Excess lifetime cancer risk (ELCR)
3.9. Annual Gonadal Dose Equivalent (AGDE)
4. Statistical Analysis
4.1 Principal Component Analysis (PCA)
4.2 Cluster Analysis (CA)
4.3 Pearson’s Correlation Coefficient Analysis
4. Conclusion
References