Asian Journal of Research and Reviews in Physics 2020-08-12T03:06:19+00:00 Asian Journal of Research and Reviews in Physics Open Journal Systems <p style="text-align: justify;"><strong>Asian Journal of Research and Reviews in Physics (ISSN: 2582-5992)</strong> aims to publish high-quality papers in all areas of 'physics'. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open access INTERNATIONAL journal.</p> Influence of Meteorological Parameters on the Variations of Atmospheric Radionuclides Concentration in Dar es Salaam, Tanzania 2020-08-12T03:06:19+00:00 Dorice Rashid Seif Yusuf Ismail Koleleni <p>Atmospheric concentrations of <sup>7</sup>Be and <sup>212</sup>Pb were measured for 11 years (2008 – 2018) in Dar es Salaam, Tanzania. The mean activity concentrations of <sup>7</sup>Be and <sup>212</sup>Pb were found to be within the range of 1.29 – 5.71 mBq/m<sup>3</sup> and 10.85 – 50.06 mBq/m<sup>3</sup>, respectively. The annual mean activity concentrations of <sup>7</sup>Be and <sup>212</sup>Pb were 4.72 ± 1.18 mBq/m<sup>3</sup> and 29.76 ± 13.63 mBq/m<sup>3</sup>, respectively. Distinct annual trends were depicted on <sup>7</sup>Be and <sup>212</sup>Pb, suggesting that the two radionuclides were affected differently with atmospheric conditions. Monthly atmospheric concentrations of <sup>7</sup>Be showed a strong seasonal variation trend with the highest in January and February and lowest in April. <sup>212</sup>Pb depicted the highest concentration during June and July and lowest in January and December. The regression analysis for <sup>7</sup>Be and <sup>212</sup>Pb activity concentrations together with number of meteorological parameters revealed that the relative humidity, rainfall, air temperature, absolute humidity and wind speed are the most significant parameters affecting radionuclides activity concentrations in the atmosphere. The sunspot numbers show 66.7% of its variability with <sup>7</sup>Be activity concentration which further suggesting that other parameters may influence its variation. <sup>212</sup>Pb, on the other hand, shows only 27.3% of its variability which clearly indicates that the existence of cosmic rays does not affect its activity concentration in the atmosphere.</p> 2020-07-27T00:00:00+00:00 ##submission.copyrightStatement##