This study presented the results of measurements of radon gas (Rn222) in the air of soil and water in the villages of Al-Rafid and Aqraba (north of Jordan) by using solid state nuclear track detectors (SSNTDs) that commercially known as (CR-39). About 160 detectors were placed in soil of two villages at 40 cm depth. Soil planted detectors were gathered 17 days past plantation. In addition, the study presented the results of measurements of radon concentration in water of springs, wells and drinking water obtained from networks. We conducted a study of radon concentrations in the water through 220 water samples from the study area (Al-Rafid and Aqraba villages). The retrieved detectors were chemically etched using KOH solution of 30% concentration at temperature of 70 0C for 8 hours. The alpha track density on the surface of (CR -39) detectors was measured using an optical microscope at proper magnification. It was found that the concentrations of radon in Al-Rafid soil were 1.76, 5.0, 4.8 and 2.03 kBq/m3 in the regions of East, West, North and South, respectively, while the average radon concentrations in soil regions of Aqraba village were 2.0, 7.1, 6.01 and 3.7 kBq/m3 in East, West, North and South, respectively. In general we note the relatively high concentrations of radon in the air of soil in the study area and the reason that this study conducted in the winter, which is characterized by a lack of drought, high humidity and low temperatures that reduces the opportunity for good ventilation rates. The study also provided the results of measurements of radon in the waters of Al-Rafid and Aqraba villages. The highest concentration of radon in spring's water of Al-Rafid village was in Busta spring and the lowest concentration in Al-Rafid spring while the average radon in Aqraba spring was 2.6 Bq/L. The radon concentration in water wells of Al-Rafid village was ranged from 1.8 Bq/L in East region to 5.3 Bq/L in West region. However, the results showed that the radon concentrations in wells of Aqraba village were highest from radon concentration in wells of Al-Rafid village, where the concentrations were 2.7, 6.3, 5.5 and 4.0 Bq/L in regions of East, West, North and South, respectively. The average radon concentration in drinking water obtained from networks in Al-Rafid village was 1.8 Bq/L which is less than average radon concentration in water obtained from networks in Aqraba village 2.4 Bq/L. Concentration of radon in the water within the limits of international
This research aimed to study the factors affected in radon levels in buildings of Suwaylih town (altitude about 900 to 1300 above the sea level) as areference to Jordan. The study was started from august, 10, 2012 to October, 10, 2012. Suwaylih Town divided into six districts namely, Al-Kamaliah, Al-Rahmaniah, Al-Sharqy, Al-Fadielah, Maysaloon, Al-Bashaaer districts. About 780 Passive dosimeters containing highly pure CR -39 were distributed randomly in districts of Suwaylih town.The indoor dosimeters were collected after three months. The collected detectors were chemically etched using 30% KOH for 9 hours at 70 ± 0.1 °C. An optical microscope was used to measure the nuclear alpha track density on the detectors surfaces.The research results showed that radon concentration affected by many factors, for example, the average concentration in guest rooms was 83 ± 18 Bq.m -3 and 70 ± 14 Bq.m -3 in bed rooms, while it was 53 ± 10 Bq.m -3 in living rooms. Morever, the concentration was about 97 ± 15 Bq.m -3 in rooms without ventilation while the concentration was about 30 ± 10 Bq.m -3 at rooms ventilated more than 9 hours daily.The study also showed the concentration was relatively high 90 ± 18 Bq.m -3 in buildings made of stones while concentration was low 47 ± 12 Bq.m -3 in the buildings made from blocks. In addition, the concentration was different with increase in age of building, the average were 63 ± 15 Bq.m -3 , 51 ± 13 Bq.m -3 and 39 ± 11 Bq.m -3 in more than 25 years, between 10 -25 years and less than 10 years, respectively. In general the radon concentration in Suwaylih town was found to be about 62 ± 13 Bq.m -3 .
In this research the authors measured radon gas concentration inside Hakama homes and calculated equivalent radiation doses in the study area. The study started from 1 June 2011 to 1 September 2011. Study area was divided into four sectors (H East, H West, H North and H South). About 200 dosimeters containing highly pure CR-39 were distributed randomly among the houses of the different sectors. Two dosimeters were distributed in each house (first in the living room and the second in the guest room). The indoor dosimeters were collected after three months. The collected detectors were chemically etched using 30 % KOH for 8 hours at 70 °C. An optical microscope was used to measure the nuclear alpha track density on the detectors surfaces.The author found that the average radon concentration in the study area was ranged from 30.2 Bq/m 3 in the sector H East to 25.7 Bq/m 3 in the sector H South . Moreover; the average radon concentration in the living rooms in the study area was 18.8 Bq/m 3 which is below that in the guest rooms 37 Bq/m 3 .Radon contributes in increasing of absorption radiation dose. The calculated equivalent radiation dose in the study area was 0.68. The average radon concentration in the study area was below the Jordanian national level.
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