Nisha Maan - Academia.edu (original) (raw)
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Dr BR Ambedkar National Institute of Technology Jalandhar India
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Papers by Nisha Maan
Indoor and Built Environment, 2017
The presence of radium, thorium and potassium in soil and building materials impose radiological ... more The presence of radium, thorium and potassium in soil and building materials impose radiological hazards to human population. Both alpha and gamma radiation are produced from the decay chain of uranium and thorium while potassium is itself a source of gamma radiation. The measurement of these radionuclides in soil is important to prevent the general public from health hazards. The measurement of radium, thorium and potassium from soil samples collected from some locations of Northern India was carried out to assess the various radiological hazard indices using sodium iodide-based gamma ray spectroscopy. The observed specific activities of radium, thorium and potassium varied from 13 to 175, 141 to 399 and 276 to 1581 Bq/kg with an average of 78, 231 and 525 Bq/kg, respectively. The mean values from soil samples under study are more than the corresponding worldwide average values (35, 30 and 400 Bq kg−1 for 226Ra, 232Th and 40K) but less than the recommended limits. The measured radi...
Radiation protection dosimetry, Jan 3, 2016
Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and th... more Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and their daughters contributes more than 50 % of the total dose from natural sources. One of the important parameters to find out the contribution of soil and building materials towards indoor radon is radon exhalation rates, which can be used for estimation of indoor radon levels. The indoor radon and thoron levels from the air and radon exhalation rates from soil samples collected from two districts (Hisar and Fatehabad) of Western Haryana are measured using pin-hole-based radon-thoron dosimeter and LR-115 solid-state nuclear track detector by canister technique. The results show that the indoor radon and thoron levels from Hisar district varied from 11 to 112 and 11 to 80 Bq m(-3), while for Fatehabad district from 5 to 24 and 59 to 105 Bq m(-3), respectively, in summer season. In winter season, indoor radon and thoron levels from Hisar district varied from 15 to 43 and 32 to 102 Bq m(-3),...
Nuclear Technology and Radiation Protection, 2015
Radon, thoron and their progenies in the indoor environment are considered as one of the health h... more Radon, thoron and their progenies in the indoor environment are considered as one of the health hazards. The alpha emitting nature of these gases made it possible to detect in indoor environment with the help of nuclear track detector techniques. The soil is the main source of indoor radon as it contains varying amounts of uranium and thorium. Thus the exhalation of radon from soil and its environmental activity needs to be studied. In the present study, the measurement of the indoor radon-thoron from the indoor environment and exhalation from soil are carried out using solid state nuclear track detector technique from Sirsa and Bhiwani districts of northern part of India. The canister technique was used to measure the radon ex- halation rate from the soil samples collected from the study area and pinhole based radon-thoron dosimeters were used to measure indoor radon and thoron concentration. The results show that indoor radon concentration varied from 9 to 28 Bq/m3, with an averag...
Indoor and Built Environment, 2017
The presence of radium, thorium and potassium in soil and building materials impose radiological ... more The presence of radium, thorium and potassium in soil and building materials impose radiological hazards to human population. Both alpha and gamma radiation are produced from the decay chain of uranium and thorium while potassium is itself a source of gamma radiation. The measurement of these radionuclides in soil is important to prevent the general public from health hazards. The measurement of radium, thorium and potassium from soil samples collected from some locations of Northern India was carried out to assess the various radiological hazard indices using sodium iodide-based gamma ray spectroscopy. The observed specific activities of radium, thorium and potassium varied from 13 to 175, 141 to 399 and 276 to 1581 Bq/kg with an average of 78, 231 and 525 Bq/kg, respectively. The mean values from soil samples under study are more than the corresponding worldwide average values (35, 30 and 400 Bq kg−1 for 226Ra, 232Th and 40K) but less than the recommended limits. The measured radi...
Radiation protection dosimetry, Jan 3, 2016
Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and th... more Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and their daughters contributes more than 50 % of the total dose from natural sources. One of the important parameters to find out the contribution of soil and building materials towards indoor radon is radon exhalation rates, which can be used for estimation of indoor radon levels. The indoor radon and thoron levels from the air and radon exhalation rates from soil samples collected from two districts (Hisar and Fatehabad) of Western Haryana are measured using pin-hole-based radon-thoron dosimeter and LR-115 solid-state nuclear track detector by canister technique. The results show that the indoor radon and thoron levels from Hisar district varied from 11 to 112 and 11 to 80 Bq m(-3), while for Fatehabad district from 5 to 24 and 59 to 105 Bq m(-3), respectively, in summer season. In winter season, indoor radon and thoron levels from Hisar district varied from 15 to 43 and 32 to 102 Bq m(-3),...
Nuclear Technology and Radiation Protection, 2015
Radon, thoron and their progenies in the indoor environment are considered as one of the health h... more Radon, thoron and their progenies in the indoor environment are considered as one of the health hazards. The alpha emitting nature of these gases made it possible to detect in indoor environment with the help of nuclear track detector techniques. The soil is the main source of indoor radon as it contains varying amounts of uranium and thorium. Thus the exhalation of radon from soil and its environmental activity needs to be studied. In the present study, the measurement of the indoor radon-thoron from the indoor environment and exhalation from soil are carried out using solid state nuclear track detector technique from Sirsa and Bhiwani districts of northern part of India. The canister technique was used to measure the radon ex- halation rate from the soil samples collected from the study area and pinhole based radon-thoron dosimeters were used to measure indoor radon and thoron concentration. The results show that indoor radon concentration varied from 9 to 28 Bq/m3, with an averag...