scholarly journals Radon indoor concentrations and activity of radionuclides in building materials in Serbia

2006 ◽  
Vol 4 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Dragana Popovic ◽  
Dragana Todorovic
Keyword(s):  
Effective Dose ◽  
20Th Century ◽  
Gamma Spectrometry ◽  
Relative Efficiency ◽  
Hpge Detector ◽  
Building Materials ◽  
Public Institutions ◽  
Closed Space ◽  
Content Determination

The paper presents the results of radon indoor concentrations measurements in homes and public institutions (kindergardens) in Belgrade, as well as the results of the radionuclides content determination in building materials from Serbia, during the eighties and up to the mid-nineties of the 20th century. The activity of the radionuclides was determined on an HPGe detector (ORTEC relative efficiency 20%) by standard gamma spectrometry. Radon indoor concentrations on the grab samples of air were determined by alpha scintillation technique (Lucas scintilation cell with ZnS/Ag). Mean effective dose equivevalents of radon and its progenies in closed space were estimated at 0.074 mSv for radon and 1.22 mSv for its short-lived daughters, in total 1.3 mSv.

scholarly journals Assessment of Equivalent Radium Activity and Annual Effective Dose Due to Building Materials in Côte D’Ivoire by Gamma Spectrometry: Cases of Cement

2019 ◽  
Vol 09 (10) ◽  
pp. 774-783 ◽  
Author(s):  
Monnehan G. Alain ◽  
Gogon B. D. L. Huberson ◽  
Braffo A. Florentin ◽  
Djagouri Koudou ◽  
Koua A. Antonin ◽  
...  
Keyword(s):  
Effective Dose ◽  
Gamma Spectrometry ◽  
Building Materials ◽  
Annual Effective Dose ◽  
Radium Activity

scholarly journals Study of Araucaria angustifolia nuts by Gamma-ray and X-Rays Fluorescence spectrometry

2019 ◽  
Vol 24 (2) ◽  
pp. 262-273
Author(s):  
Edher Zacarías Herrera ◽  
Avacir Casanova Andrello ◽  
Carlos Roberto Appoloni
Keyword(s):  
Gamma Spectrometry ◽  
Relative Efficiency ◽  
Hpge Detector ◽  
Gamma Ray ◽  
Gamma Ray Spectrometry ◽  
Average Dose ◽  
X Rays ◽  
Araucaria Angustifolia ◽  
Annual Consumption ◽  
Per Capita

The seed of Araucaria angustifolia is largely produced and consumed in Parana state, Brazil. It has an estimated annual consumption of approximately 0.167 kg per capita. The samples of seeds were acquired in 8 different commercial points of Londrina city in the state of Paraná, Brazil. To determine the natural level of radiation and elemental composition were analysed the seed pulp and peels, to determine the level of radiation in these samples and to calculate the effective dose per intake, the gamma ray spectrometry was applied using the HPGe detector with a 60% relative efficiency, and the X-rays Fluorescent by Dispersive Energy (EDXRF) was applied for elemental identification of the composition with a spectrometer from Shimadzu EDX-720 model. The samples were qualitatively analyzed by EDXRF, where the elements K, Fe, Cu, Zn, Rb, Ca, P, Mg and Sr were found in pulp and peels of seed, however, the elements Mg and Sr were detected only in the peel samples. The results obtained by gamma spectrometry showed that the radioactive activities in the Araucaria angustifolia pulp per kilogram in nature, for 226Ra ranged from 0.691 to 2.269 Bq/kg, the interval activity measured for the 228Ra were 0.386 to 1.767 Bq/kg and the 40K were 283.405 to 1,536.820 Bq/kg. Activities of 137Cs were detected in the pulp and peels of seed. The average dose per intake was 0.68 µSv/year for 226Ra and 0.35 µSv/year for 228Ra.

scholarly journals Experimental and Simulated Effective Dose for Some Building Materials in France

2013 ◽  
Vol 03 (02) ◽  
pp. 41-45 ◽  
Author(s):  
Samir Dziri ◽  
Abdellatif Nachab ◽  
Abdelmjid Nourreddine ◽  
Addil Sellam ◽  
Dominique Gelus
Keyword(s):  
Effective Dose ◽  
Building Materials

scholarly journals Study on analyzing overlaped peaks using the Gold algorithm of unfolding

2016 ◽  
Vol 19 (2) ◽  
pp. 71-79
Author(s):  
Loan Thi Hong Truong ◽  
Hoa Phuc Long Cao ◽  
Phuong Dang Nguyen ◽  
My Thi Thao Dang ◽  
Huy Quang Ngo
Keyword(s):  
Gamma Spectrometry ◽  
Environmental Samples ◽  
Hpge Detector ◽  
Gamma Spectrum ◽  
Low Level ◽  
Continuum Region ◽  
Gamma Spectra

In this work, we initially applied the Gold unfolding algorithm to deconvolute continuum region in the gamma spectra and to analyze its overlaped peaks for the gamma spectrometry using HPGe detector. The results could be used to analyse overlaped peaks of low level gamma spectrum for environmental samples.

scholarly journals Determination of 226Ra in TENORM Sample Considering Radon Leakage Correction

2021 ◽  
Vol 46 (3) ◽  
pp. 127-133
Author(s):  
Sooyeon Lim ◽  
Nur Syamsi Syam ◽  
Seongjin Maeng ◽  
Sang Hoon Lee
Keyword(s):  
Gamma Spectrometry ◽  
Building Materials ◽  
Activity Concentration ◽  
Indoor Radon ◽  
Radioactive Material ◽  
Activity Measurement ◽  
Calculated Concentration ◽  
Natural Concentration ◽  
226Ra Activity ◽  
226Ra Activity Concentration

Background: Phosphogypsum is material produced as a byproduct in fertilizer industry and is generally used for building materials. This material may contain enhanced radium-226 (226Ra) activity concentration compared to its natural concentration that may lead to indoor radon accumulation. Therefore, an accurate measurement method is proposed in this study to determine 226Ra activity concentration in phosphogypsum sample, considering the potential radon leakage from the sample container.Materials and Methods: The International Atomic Energy Agency (IAEA) phosphogypsum reference material was used as a sample in this study. High-purity germanium (HPGe) gamma spectrometry was used to measure the activity concentration of the 226Ra decay products, i.e., 214Bi and 214Pb. Marinelli beakers sealed with three different sealing methods were used as sample containers. Due to the potential leakage of radon from the Marinelli beaker (MB), correction to the activity concentration resulted in gamma spectrometry is needed. Therefore, the leaked fraction of radon escaped from the sample container was calculated and added to the gamma spectrometry measured values.Results and Discussion: Total activity concentration of 226Ra was determined by summing up the activity concentration from gamma spectrometry measurement and calculated concentration from radon leakage correction method. The results obtained from 214Bi peak were 723.4 ± 4.0 Bq· kg-1 in MB1 and 719.2 ± 3.5 Bq· kg-1 in MB2 that showed about 5% discrepancy compared to the certified activity. Besides, results obtained from 214Pb peak were 741.9 ± 3.6 Bq· kg-1 in MB1 and 740.1 ± 3.4 Bq· kg-1 in MB2 that showed about 2% difference compared to the certified activity measurement of 226Ra concentration activity.Conclusion: The results show that radon leakage correction was calculated with insignificant discrepancy to the certified values and provided improvement to the gamma spectrometry. Therefore, measuring 226Ra activity concentration in TENORM (technologically enhanced naturally occurring radioactive material) sample using radon leakage correction can be concluded as a convenient and accurate method that can be easily conducted with simple calculation.

Sign in / Sign up

Export Citation Format

Share Document