TY - JOUR AU - Pervin, Shikha AU - Dewan, Md Jafor AU - Apon, Ashif Mahamud AU - Siraz, MM Mahfuz AU - Yeasmin, Selina PY - 2021/07/15 Y2 - 2024/03/28 TI - Measurement of natural radioactivity and its health hazards associated with the use of different branded cement samples collected from different manufactures in Dhaka city using gamma spectrometry JF - Journal of Bangladesh Academy of Sciences JA - J Bangladesh Acad Sci VL - 45 IS - 1 SE - Research Articles DO - 10.3329/jbas.v45i1.54433 UR - https://www.banglajol.info/index.php/JBAS/article/view/54433 SP - 95-104 AB - <p>The radioactivity of naturally occurring radionuclides <sup>226</sup>Ra, <sup>232</sup>Th, and <sup>40</sup>K was determined in thirteen cement samples collected from different manufactures of Dhaka city. The measurement was performed by gammaray spectrometry system using high purity germanium (HPGe) detector. The average activity of <sup>226</sup>Ra, <sup>232</sup>Th, and <sup>40</sup>K in cement samples are fon und to be 30.23±15.04 Bqkg<sup>-1</sup>, 20.10±11.76 Bqkg<sup>-1</sup> and 145.27±24.14 Bqkg<sup>-1</sup>, respectively. The average values of radium equivalent activity (Raeq), absorbed dose rates (<em>D</em>), internal hazard and external hazard index (<em>H</em>ex), and annual effective dose equivalent are 370 Bqkg<sup>-1</sup>, 0.27, 0.18, and 27.99 nGyh<sup>-1</sup>, respectively. The average annual effective dose is found 0.13 mSvy<sup>-1</sup>, which is less than the recommended value (1 mSvy<sup>-1</sup>) by the International Commission on Radiological Protection (ICRP-60, 1990), as the maximum permissible annual effective dose to the members of the public. The present study results are discussed and compared with those reported in similar studies and with internationally recommended values. No artificial radioactivity was found in the present study. The results show that the analyzed cement samples do not pose any significant radiation hazard from naturally occurring radionuclides <sup>226</sup>Ra, <sup>232</sup>Th and <sup>40</sup>K reported here and also considered safe for use in buildings construction.</p><p>J. Bangladesh Acad. Sci. 45(1); 95-104: June 2021</p> ER -