Major parameters affecting the calculation of equilibrium factor using SSNTD-measured track densities

Abo-Elmagd, M.; Mansy, Muhammad S.; Eissa, H.M.; El-Fiki, M.A.

doi:10.1016/j.radmeas.2005.06.007

Cited by 20 publications

(9 citation statements)

References 10 publications

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“…The track density was determined by using optical microscope at 640× magnification which calibrated before usages [14]. The background of CR-39 track detector was counted by optical microscope and subtracted from the count of all detectors [15,4].…”

Section: Methodsmentioning

confidence: 99%

Measurement of Radium Concentration and Radon Exhalation Rates of Soil Samples Collected from Selected Area of Aden Governorate, Yemen, Using Plastic Track Detectors

AS-Subaihi¹,

Harb²,

Abdulgabar³

2019

IJHEP

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Radon exhalation rate from soil is one of the most important factors for evaluation of the environmental radon level. Solid State Nuclear Track Detectors (CR-39) has been widely used for the study of different aspects of radon emission from soil and others. In this paper, we are presenting the results of radon concentration, its exhalation rate and radium content in soil samples collected from different locations of northern part of Aden governorate, south of Yemen. The outdoor radon levels concentrations were found to vary from 264.59Bq m-3 to 539.72Bq m-3 with a mean value of 369.29Bq m-3. The radon exhalation rate in terms of area and in terms of mass were found to vary from 460.08 mBq.m-2 .h-1 to 938.47mBq.m-2 .h-1 with a mean value of 642.12mBq.m-2 .h-1 and from 25.99mBq.m-2 .h-1 to 53.02mBqkg-1 .h-1 with a mean value of 36.28 mBqkg-1 .h-1. The results of effective radium concentrations in these sites were found to vary from 3.44 Bqkg-1 to 7.01 Bqkg-1 with a mean value of 4.80Bqkg-1. The working level varied from 4.54mWL to 9.26mWL with a mean value of 6.34mWL. The radon annual effective dose was varied from 0.049mSvy-1 to 0.100mSvy-1 with a mean value of (0.068±0.18) mSvy-1 for outdoor and from 0.20mSvy-1 to 0.40mSvy-1 with a mean value of 0.27mSvy-1 for indoor. The results indicate that the soil is quite safe for occupancies and to be used as building materials.

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Section: Methodsmentioning

confidence: 99%

Measurement of Radium Concentration and Radon Exhalation Rates of Soil Samples Collected from Selected Area of Aden Governorate, Yemen, Using Plastic Track Detectors

AS-Subaihi¹,

Harb²,

Abdulgabar³

2019

IJHEP

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“…[9,10], the critical angle was considered the same for all particles resulted from radon and its progeny, but the critical angle based on relation (14) for various nuclei is different. …”

Section: Discussionmentioning

confidence: 99%

“…where K T is the total detection response of the filtered track detector and can be obtained using the following equation: (V/S)e S i is the volume to the internal surface area ratio of the diffusion chamber which is valid for all geometries and K i p is given as follows [3,7,9,10]:…”

Section: Article In Pressmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical calculation on CR-39 response for radon measurements and optimum diffusion chambers dimensions

Argani

Ghandi

Rahimi

et al. 2008

Nuclear Instruments and Methods in Physics Research Section A:

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“…The track density ratio (ρ e /ρ i ) between external (ρ e ) and internal (ρ i ) detectors was used for calculating the equilrium factor (F), where [11] …”

Section: Measuring Proceduresmentioning

confidence: 99%

Seasonal variation of radon level and radon effective doses in the Catacomb of Kom EI-Shuqafa, Alexandria, Egypt

Abd-Elzaher

2011

Pramana - J Phys

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Inhalation of radon has been recognized as a health hazard. In the present work radon concentration was measured, in the atmosphere of the archaeological place, namely Catacomb of Kom El-Shuqafa, in Alexandria, Egypt, which is open to the public, using time-integrated passive radon dosimeters containing LR-115 solid-state nuclear track detector. The measurements were performed throughout winter and summer. Seasonal variation of radon concentration, with the maximum in summer ranging from 243 to 574 Bq m −3 and minimum in winter ranging from 64 to 255 Bq m −3 was observed. Because of the variations of the catacomb ventilation system, the equilibrium factor between radon and its progeny ranges from 0.14 to 0.48. The tour guides are exposed to an average estimated annual effective dose ranging from 0.21 to 0.52 mSv y −1 and the visitors from 0.88 to 2.28 μSv y −1 . The effective doses the catacomb workers are exposed to ranged from 0.20 mSv y −1 in winter to 4.65 mSv y −1 in summer which exceeds the lower bound of the recommended level (3-10 mSv y −1 ) (ICRP, 1993).

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Major parameters affecting the calculation of equilibrium factor using SSNTD-measured track densities

Cited by 20 publications

References 10 publications

Measurement of Radium Concentration and Radon Exhalation Rates of Soil Samples Collected from Selected Area of Aden Governorate, Yemen, Using Plastic Track Detectors

Measurement of Radium Concentration and Radon Exhalation Rates of Soil Samples Collected from Selected Area of Aden Governorate, Yemen, Using Plastic Track Detectors

Theoretical calculation on CR-39 response for radon measurements and optimum diffusion chambers dimensions

Seasonal variation of radon level and radon effective doses in the Catacomb of Kom EI-Shuqafa, Alexandria, Egypt

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