Long-term measurements of radon progeny concentrations with solid-state nuclear track detectors

Yu, K.N.; Nikezić, D.; Ng, F.; Leung, J.K.C.

doi:10.1016/j.radmeas.2005.03.007

Cited by 46 publications

(29 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The instrument features a built-in detector, ZnS (Ag) adhered to plastic cintillation material, tube 5 …”

Section: Ludlum3030mentioning

confidence: 99%

“…The minimum radon concentration is recorded at location (Phy20a2), Optical Physics Laboratory, with a value 35.964±5.997Bq/m 3 , and the maximum radon concentration recorded at location (Phy12a2), teaching staff room no. 5 [29]. The indoor annual effective dose vary from 0.378mSv/y in (Phy20a2) to 0.599mSv/y in (Phy12a2) with an average value 0.495mSv/y which is less than the lower limit of the admissible range 3-10mSv/y (ICRP, 1993) [31].…”

Section: The Measurements At 175 Meter For Department Of Physicsmentioning

confidence: 99%

“…If its concentration in indoor air becomes high, radon and its decay products can be inhaled and couse lung cancer. Many privious studies of indoor radon concentration have been performed with widely used of solid state nuclear track detectors (SSNTDs) [4,5,6,7,8,9,10]. However, in this work the indoor radon gas concentrations using CR-39 detctors have been measured in the department of physics in college of science of Al-Mustansiriyah University, at which a radioactive sources are usualy used in their laboratories.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

Al-Alawy

Fadhil

2015

ILCPA

View full text Add to dashboard Cite

ABSTRACT. Measurements of radon gas concentrations with their progeny and the annual effective dose indoor the building of Al-Mustansiriyah University College of Science-Physics Department have been carried out by using time-integrated passive radon dosimeters solid state nuclear track detector CR-39 technique. The detectors with 1cm x1cm have been distributed over 70 places and suspended for sitting (1m) and standing (1.75m) positions in each location under study. The dosimetric measurements are made over a period of 90 days from 30 January 2014 to 30 April 2014. The calibration process has been done using radium-226 source with known activity radiation. It has found that the indoor radon gas concentrations varing from 37. (ICRP, 2009). The annual effective dose of the inhalation exposure to radon gas has been estimated and this vary from 0.394mSv/y to 0.617mSv/y with an average value 0.540mSv/y at 1m, and varing from 0.378mSv/y to 0.599mSv/y with an average value 0.495mSv/y at 1.75m which are within the worldwide permissible limist 3-10mSv/y (ICRP, 1993). The potential alpha energy concentration found to vary from 4.053mWL to 6.343mWL with an average value 5.557mWL at 1m and vary from 3.888mWL to 6.162mWL with an average value 5.087mWL at 1.75m which are less than the recommended value 53.33mWL (UNSCEAR, 1993). The lung cancer cases per million person per year vary from 7.093 to 11.101 per million person per year with an average value 9.725 per million person per year at 1m and vary from 6.805 to 10.784 per million person per year with an average value 8.904 per million person per year which are less than the recommended range 170-230 per million person per year (ICRP, 1993). The number of decays per-minute using swabs measurements technique have been used for selected units within two swabs from building materials walls for each unite, with area of 100cm 2 using Ludlum 3030, the average of three swabs measurements have been calculated. Hence, the effectiveness of emitted alpha particles from the walls has been calculated to be varied from 0.00000 to 0.02222Bq/cm 2 with an average value 0.01169Bq/cm 2 at 1m and 0.01015Bq/cm 2 at 1.75m respectevily which are within the permissible limit 0.04Bq/cm 2 (Danial, 2010).

show abstract

“…The instrument features a built-in detector, ZnS (Ag) adhered to plastic cintillation material, tube 5 …”

Section: Ludlum3030mentioning

confidence: 99%

Section: The Measurements At 175 Meter For Department Of Physicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

Al-Alawy

Fadhil

2015

ILCPA

View full text Add to dashboard Cite

show abstract

“…This procedure brings the supposition that one measurement of the equilibrium factor between radon and its progenies can picture properly what happens in a period of some months. But long term radon progeny measurements had already been proposed for LR-115 and Makrofol [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on the influence of CR-39 detector size on radon progeny detection in indoor environments

Pereira¹,

Hadler²,

Guedes³

et al. 2014

AIP Conference Proceedings

View full text Add to dashboard Cite

“…In the present work, we will develop a method based on the sensitivity of the LR 115 SSNTD, i.e., the number of etched tracks completely penetrating the active cellulose nitrate layer. The method will make use of the proxy equilibrium factor (F p ) developed by Nikezic et al (2004) and Yu et al (2005) (see Section 2 below), and the experiments involve the determination of the sensitivities of the bare LR 115 SSNTD to 222 Rn and its short-lived progeny for different removed active layer thickness.…”

Section: Introductionmentioning

confidence: 99%

Derivation of V function for LR 115 SSNTD from its partial sensitivity to 222Rn and its short-lived progeny

Leung

Nikezić

2007

Journal of Environmental Radioactivity

Self Cite

View full text Add to dashboard Cite

Solid-state nuclear track detectors (SSNTDs) have been widely applied for measurements of environmental concentrations of 222Rn and its progeny. The V function for an SSNTD is important for understanding the track development in the SSNTD as well as for real life applications. The partial sensitivity rhoi of the LR 115 detector applied in the bare mode to 222Rn and its short-lived progeny is related to the equilibrium factor F through the proxy equilibrium factor Fp. On the other hand, rhoi is also dependent on the removed active layer thickness during chemical etching, which is related to the V function for the LR 115 detector. In the present paper, the experimentally obtained rhoi values of the LR 115 detector for different removed active layer thickness are used to derive the V function for the LR 115 SSNTD, which took the form of the Durrani--Green's function, i.e., [formula: see text] , with the best-fitted constants as a1=14.23; a2=0.48; a3=5.9 and a4=0.077 (a5=1).

show abstract

Long-term measurements of radon progeny concentrations with solid-state nuclear track detectors

Cited by 46 publications

References 20 publications

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

Study on the influence of CR-39 detector size on radon progeny detection in indoor environments

Derivation of V function for LR 115 SSNTD from its partial sensitivity to 222Rn and its short-lived progeny

Contact Info

Product

Resources

About