scholarly journals Retrospective radon measurements based on implanted 210Po in glass objects using polycarbonate detectors

2018 ◽  
Vol 33 (2) ◽  
pp. 167-173
Author(s):  
Alireza Azadbar ◽  
Dariush Sardari ◽  
Mohamadreza Kardan ◽  
Samaneh Baradaran
Keyword(s):  
Solid State ◽  
Radon Concentration ◽  
Activity Concentration ◽  
Diffusion Chamber ◽  
Average Value ◽  
Nuclear Track Detectors ◽  
210Po Activity ◽  
Cylindrical Diffusion ◽  
Radon Measurements ◽  
First Time

In the present investigation, a surface-deposited polonium was measured in 37 houses in Rasht and Ramsar cities of Iran with the aim of evaluating the retrospective radon concentration. The CR-LR technique is widely used in this regard, but for the first time, Lexan polycarbonate detectors were used to measure the activity of 210Po planted in glassy objects. These detectors were placed on glassy surfaces for 153 to 365 days. A passive cylindrical diffusion chamber was used for the contemporary radon concentration measurements. The diffusion chamber consists of the Lexan polycarbonate films as a solid state nuclear track detectors and filter. The surface-deposited 210Po activity concentration was found to vary from 0.26 to 11.96 mBqcm-2 with average of 2.62 mBqcm-2. The sensitivity of 210Po to polycarbonate was determined to be 0.06456 track per cm2 per mBqhcm-2. Thus, the radon concentration was found to vary from 122 to 4840 Bqm-3 with an average value 1243 Bqm-3 and the contemporary radon concentration in the area was found to vary from 15 to 2420 Bqm-3 with an average 513 Bqm-3. The results indicate that there is a significant correlation between the concentration of the retrospective radon and the concentration of the contemporary radon gas in the indicated areas with a coefficient of 0.80672.

scholarly journals Measurement Radon Concentration in Imported and Local Wood Using Solid State Nuclear Track Detectors

2013 ◽  
Vol 10 (2) ◽  
pp. 296-300
Author(s):  
Baghdad Science Journal
Keyword(s):  
Solid State ◽  
Radon Concentration ◽  
Building Materials ◽  
Detection Technique ◽  
Measurement Device ◽  
Radon Gas ◽  
Nuclear Track Detectors ◽  
Cylindrical Diffusion ◽  
Diffusion Tube ◽  
Radon Concentrations

Abstract: The aim of the present work is to measure radon concentration in wood. Solid state nuclear track detectors of type CR – 39 was used as measurement device. Eight different samples of imported and local wood were collected from markets. Samples were grinded, dried in order to measure radon concentrations in it. Cylindrical diffusion tube was used as detection technique. Results show that the higher concentration was in Iraqi sample 1 which recorded (14.02 ± 0.9) Bq / m3, while the less was in Emirates Sample which recorded (5.35 ± 1.2) Bq / m3. From the present work, all wood samples were with lowest concentrations of radon gas than other building materials.

scholarly journals Measurements of Radon-222 and its Daughters Concentrations in Buildings of Department Physics in College of Sciences of Baghdad University

2008 ◽  
Vol 5 (4) ◽  
pp. 605-611
Author(s):  
Baghdad Science Journal
Keyword(s):  
Solid State ◽  
Radon Concentration ◽  
Indoor Radon ◽  
Radon Level ◽  
Nuclear Track Detectors ◽  
Radioactive Sources ◽  
Radon Concentrations

The present work aims to investigate approaches, measures and detection of indoor radon level in buildings of the department of physics in college of science of Baghdad University. CR-39 solid state nuclear track detectors were used to measure the radon concentrations inside the rooms, including five laboratories and five workplace rooms in ground and first storey of the department. The average radon concentration at first storey was found to be 43.1±13.2 Bq/m3 and 40.1±13.4 Bq/m3 at the ground storey. The highest level of radon concentration at the first storey in the radioactive sources store was 87.5±29 Bq/m3 while at the ground storey in room(2) was 70.2±24 Bq/m3 which is due to the existence radioactive sources in some selected places at the buildings.

scholarly journals COMPARISON OF RADON MASS EXHALATION RATE MEASUREMENTS FROM BUILDING MATERIALS BY TWO DIFFERENT METHODS

2020 ◽  
Vol 191 (2) ◽  
pp. 255-259
Author(s):  
Sandra Soares ◽  
Joaquim Kessongo ◽  
Yoenls Bahu ◽  
Luis Peralta
Keyword(s):  
Solid State ◽  
Building Materials ◽  
Exhalation Rate ◽  
Active Method ◽  
Passive Method ◽  
Nuclear Track Detectors ◽  
Liquid Silicone ◽  
Materials Used ◽  
Radon Measurements ◽  
Good Agreement

Abstract The aim of this study is to measure the radon mass exhalation rate from common granite building materials used in the east and northeast part of Portugal. Twelve cubic shaped samples were measured. Nine of them without any coating and three coated with different materials (varnish, hydrorepellent and liquid silicone). The radon measurements were performed with two different techniques: one using passive detectors and other using an active detector. For the passive method, CR-39 solid-state nuclear track detectors were used. The active method used the RAD7 DURRIDGE detector. Radon mass exhalation rates obtained from both methods present relatively low values in the 11–45 mBq kg−1 h−1 range for the analysed samples. Concerning the coated samples, the measured values are on average four times lower than the ones without coating. Overall, the measured values for both methods present a good agreement.

Advances in Measurement of Indoor 222Rn and 220Rn Gas Concentrations Using Solid State Nuclear Track Detectors

2015 ◽  
Vol 238 ◽  
pp. 116-126 ◽  
Author(s):  
B.K. Sahoo ◽  
B.K. Sapra
Keyword(s):  
Cost Effectiveness ◽  
Solid State ◽  
Field Experiments ◽  
Performance Comparison ◽  
Mode Ii ◽  
New Device ◽  
Nuclear Track Detectors ◽  
Radon Measurements ◽  
Selection Of ◽  
Radon Monitoring

Solid State Nuclear Track Detectors (SSNTDs) have been widely used for time integrated radon measurements due to their cost effectiveness, portability and easy-to-use feature. In order to obtain a proper measurement of radon using SSNTDs, it is necessary to select a proper exposure mode. The various modes in which the SSNTDs can be exposed are: (i) bare mode, (ii) single cup mode, and (iii) twin cup mode. This paper addresses the merits and demerits of SSNTDs used in each type of mode of exposure for radon monitoring. The paper analyses the results of the conventional bare mode as well as the latest twin cup mode of SSNTDs. The paper also analyses the performance comparison of single entrance vis a vis double entrance type twin cup dosimeter. Design and features of the newly developed pinhole based single entrance twin cup dosimeter have been discussed. A protocol has been proposed for the selection of houses and deployment of the dosimeter. Some of the important findings from laboratory and field experiments of the new device have been presented.

Indoor radon measurements in dwellings of Kulu area, Himachal Pradesh, using solid state nuclear track detectors

2001 ◽  
Vol 34 (1-6) ◽  
pp. 505-508 ◽  
Author(s):  
Surinder Singh ◽  
Rajeev Malhotra ◽  
Jatinder Kumar ◽  
Lakhwant Singh
Keyword(s):  
Solid State ◽  
Indoor Radon ◽  
Himachal Pradesh ◽  
Nuclear Track Detectors ◽  
Radon Measurements
Sign in / Sign up

Export Citation Format

Share Document