Indoor radon concentrations in urban settlements on the Montenegrin Coast

Computer program for the sensitivity calculation of a CR-39 detector in a diffusion chamber for radon measurements

“…3 and 4 render smallest values, well below experimental results, while functions no. 1 and 5 gave good agreement with Mahlobo and Farid, 32 Garawi, 33 and Antovic et al 34 The result given by Ismail and Jaafar 35 is well above all calculation data.…”

“…where f 1 is the fraction of 218 Po decayed in air and f 4 is the fraction of 214 Po decayed in air. 34 Conical Two extreme cases exist here: (a) all radon progeny decay in the chamber volume (i.e., in air) before deposition when f 1 = f 4 = 1 and (b) all progeny are deposited before decay f 1 = f 4 = 0. Sensitivities are given for both extreme cases, and the real one is between these two values.…”

“…For these reasons it was difficult to perform comparison with experimental results. However, several articles were chosen Mahlobo and Farid, 32 Garawi, 33 Antovic et al, 34 and Ismail and Jaafar. 35 Basic information of the chamber and etching conditions used by these authors are given in Table I. In experiments, rectangular detector was more convenient to use, while in calculation it was circular.…”

Radon Concentration in Buildings in the South Region of Kingdom of Saudi Arabia

“…Exposure to the radon gas which is present naturally in the environment as a daughter of radium-226 can cause a significant health hazard. the poorly ventilated in the dwelling areas like houses, universities, schools and other building in the Saudi Arabia [1][2][3][4] can increase the radon concentration in these areas, therefore the annihilation rate will increase to the level higher than the international levels which we can see in the NCRP reports [5][6][7][8][9][10][11].…”

“…Because of the windows in the King Saudi Arabia are continuously closed (90%) and it was absent in a wide range of rooms, Bad ventilation arise. Because of the high sensitivity of the solid state nuclear track detector CR-39 to alpha energy up to 40MeV it was used in several investigations which were done in different regions in Saudi Arabia and other Arabic and foreign country [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] for a long period through different seasons of the year. In the present work the radon concentration and exhalation rates were measured for different placed inside the Al-Qunfudhah University college which including conference rooms, meeting rooms libraries, and laboratories' and other places.…”