TY - JOUR AU - AS-Subaihi, Fuad Abdo AU - Salem, Tahir Abdullah Abdulgabar AU - Ahmed, Mahmood Issa PY - 2023/03/31 Y2 - 2024/03/29 TI - ASSESSMENT OF NATURAL RADIOACTIVITY LEVEL AND ASSOCIATED RADIOLOGICAL HAZARDS IN MARINE SEDIMENT SAMPLES COLLECTED FROM ABYAN BEACH, GULF OF ADEN, YEMEN JF - Electronic Journal of University of Aden for Basic and Applied Sciences JA - Electron. J. Univ. Aden Basic Appl. Sci. VL - 4 IS - 1 SE - Articles DO - 10.47372/ejua-ba.2023.1.217 UR - https://ejua.net/index.php/EJUA-BA/article/view/217 SP - 18-30 AB - <p style="text-align: justify;">Twenty three marine sediment samples taken from the side beach from the Abyan beach, Aden Gulf, Yemen to measuring the activity concentration of terrestrial radionuclides radium-226, thorium-232 and potassium-40 and its associated hazard indices using gamma spectrometer with High-Purity Germanium HPGe detector. The average activity concentration of natural radionuclides <sup>226</sup>Ra,<sup> 232</sup>Th and <sup>40</sup>k in marine sediments samples under investigation were 16.25± 0.63Bqkg<sup>-1</sup>, for Ra-226, 23.80± 1.46Bqkg<sup>-1</sup> for Th-232 and 518.54±44.61Bqkg<sup>-1 </sup>for K-40 respectively. The radiation hazard indices which resulting from the presence of natural radionuclides in marine sediment samples were calculated and the obtained results indicate that the average value of radium equivalent activity was 90.21Bqkg<sup>-1</sup>. The average value of External hazard index H<sub>ex</sub> was 0.243 and the average values of internal hazard index H<sub>in</sub> was 0.287. The average value of outdoor absorbed dose rate D<sub>out</sub> was 43.66nGyh<sup>−1</sup> and indoor absorbed dose rate D<sub>in</sub> was 83.13nGyh<sup>−1</sup>. The average values of annual outdoor effective dose AED<sub>out</sub> was 0.053mSvy<sup>-1</sup>and the annual indoor effective dose AED<sub>in</sub> was 0.407mSvy<sup>-1</sup>. The average values of the annual gonadal dose equivalent <em>AGDE</em> were 312.52μSvy<sup>-1</sup>. While the average values of outdoor excess life-time cancer risk <em>ELCR</em><sub>out</sub> was 0.187×10<sup>−3</sup> and the indoor excess life-time cancer risk <em>ELCR</em><sub>in</sub> was 1.427×10<sup>−3</sup>. They are less than worldwide limits.</p> ER -