Comparison of radon concentrations in soil gas and indoor environment of Afyonkarahisar province

It is well known that radon is the main source of natural radiation exposure to the population. Indoor radon concentrations in an area are affected by ascending radon migration following the convection of groundwater and soil gas along fractures and faults in the bedrock sediments. There are various studies showing that positive radon anomalies in the soil gas are found to coincide with the locations of houses showing the highest concentrations. Moreover, soil gas radon levels and soil permeability are important factors in determining the radon potential of an area, because high permeability enables the increased migration of radon from the soil into houses. Since radon in homes originates mainly from soil gas radon, it is of public interest to study the correlation between soil gas radon and indoor radon in different geographic locations. In the present work, a correlation study was carried in conjunction with radon concentrations in soil gas and indoor environment of Afyonkarahisar Province. The provincial center was assumed to be divided into four regions according to the rock types and tectonic structure to show also the geological structure effect on radon concentrations. The indoor radon concentrations were measured in 74 dwellings using CR-39 passive nuclear track detectors, and the radon concentrations in soil gas were determined in 243 drilled holes using AlphaGUARD detector. The correlation coefficient of 0.97 was obtained between radon concentrations in soil gas and indoor environment of Afyonkarahisar Province.Turkish Atomic Energy Authority Afyon Kocatepe University Science Research Projects Coordination Uni

76Se,78Se ve 80Se (γ,n) Reaksiyon Tesir Kesitlerinin Hesaplanması

Özet: Bu çalışmada, 76Se, 78Se ve 80Se isotoplarının (γ,n) reaksiyon tesir kesitleri TALYS 1.6 kodu kullanılarak güç fonksiyonları hesaplandı. Hesaplanan sonuçların EXFOR'daki deneysel tesir kesitleri ile iyi uyum içerisinde olduğu görüldü. Anahtar kelimeler: Tesir kesiti, reaksiyon, güç fonksiyonu Calculation of the 76Se, 78Se and 80Se (γ,n) reaction cross section Abstract: In this work, the (γ,n) cross section of Se isotopes (76Se, 78Se,80Se) were calculated by using TALYS 1.6 to supply fundamental data for estimating the inverse reaction cross-section. The calculated cross section are in good agreement with available measurements obtained from EXFOR. Key words: Cross-section, reaction, strength functio

Determination of Indoor Radon Concentration and Effective Dose Equivalent at Workplaces of Afyonkarahisar Province

It is commonly known that people are exposed to radon and its progenies since they spend about 35% of daytime at workplaces. This exposure has been reported to be more than 50% of the natural radiation. Therefore, determination of indoor radon concentration has been widely conducted by the scientists. This work presents indoor radon measurements and the associated annual dose equivalentsobtained in 28 public buildings of the Afyonkarahisar province. The survey was conducted using passive nuclear track detectors and repeated quarterly during a year.The investigation focused on the seasonal and regional effects in indoor radon concentration anomalies. The measured values ranged from 13 Bq.m-3to 1932 Bq.m-3, whereas the calculated average values were in the range of 21,75 Bq.m-3and 1032,50Bq.m-3. Moreover, the mean indoor radon concentration and the corresponding annual dose equivalent valueswere obtained as 158,83±13,16Bq.m-3and 1,25±0,10mSv.y-1, respectively

Correlation between soil gas radon concentrations and terrestrial radioactivity (U-238 and Th-232) in Afyonkarahisar

Humans are exposed both to natural radiation from the radioactive elements that have existed in the earth's crust since the formation of the earth and to artificial radiation from medical applications and sparrows after nuclear tests. The most important part in natural radiation affecting human beings is radon derived from terrestrial radioactive elements of Uranium and Thorium. Terrestrial radiation level is strictly related to the contents of Thorium (232Th), Uranium (238U) and Potassium (40K) in rocks which is the origin of the soil in an area, and to the geological composition of the area. The determination of natural background radiation levels is of great importance for all living things. In order to determine whether the living zone is healthy in terms of natural radiation, the concentrations of the radionuclides in the surrounding environment and the effects of radiation on all the living things must be known. In this study, it was aimed to determine the terrestrial background radiation level on the soil surface, and to evaluate the correlation between the Uranium and Thorium concentrations and the soil gas radon activity values in Afyonkarahisar city center.Afyon Kocatepe University Science Research Projects Coordination Uni

Zr, I, Pr, Au and Pb Photoneutron Reaction Cross Sections

Abstract: : In this work, Zr, I, Pr, Au and Pb photoneutron reaction cross sections were calculated by using TALYS 1.6 computer code near the peak of the giant dipole resonance. The calculated results were compared with the measured values available in the literature. Similarities and discrepancies among previous studies were discussed. Key words: Cross section, photoneutron, giant dipole resonance Zr, I, Pr, Au ve Pb Fotonötron Reaksiyon Tesir Kesitleri Özet: Bu çalışmada Zr, I, Pr, Au ve Pb fotonötron reaksiyon tesir kesitleri TALYS 1.6 bilgisayar kodu kullanılarak büyük dipol rezonans piki yakınlarında hesaplandı. Heaplama sonuçları literatürde olan deneysel verilerle karşılaştırıldı. Daha önceki çalışmalarda olan benzerlik ve farklılıklar vurgulandı. Anahtar kelimeler: Tesir kesiti, fotonötron, büyük dipol rezonan

197Au Çekirdeği İçin(γ,n) Tesir Kesitlerinin Reaksiyon Sınırının Altında ve Üstünde Hesaplanması

Özet: Bu çalışmada, 197Au(γ,n)196Au reaksiyonunun tesir kesiti Esınır = 8,071 MeV enerji sınırı civarında hesaplandı. Hesaplamalar daha önceki deneysel veri ve hesaplamalar ile karşılaştırıldı ve genel uyum içerisinde olduğu görüldü. Ayrıca197Au(γ,n)196Au reaksiyon oluşum uygunluğu tartışıldı. Anahtar kelimeler: Tesir kesiti, reaksiyon, sınır Calculation of the (γ,n) reaction cross section around the threshold for 197Au nucleus Abstract: In this work, 197Au(γ,n)196Au reaction cross section haave been calculated around the reaction threshold at Ethr= 8,071 MeV by using TALYS 1.6 computer code. The results are compared with previous measurements and calculations. Moreover the relevance 197Au(γ,n)196Au reaction is discussed. Key words: Cross Section, reaction, threshol

A novel triazine-bearing calix[4]arene: Design, synthesis and gas sensing affinity for volatile organic compounds

WOS: 000465052300008A novel triazine-calix[4]arene conjugate was designed and synthesized with the aim to study gas sensing against volatile organic compounds (VOCs) such as dichloromethane, chloroform and carbon tetrachloride. This novel compound was fully characterized by spectroscopic techniques such as FTIR,H-1 and C-13 NMR along with HRMS and BET analysis. The triazine based calix[4]arene organic materials were fabricated onto quartz glasses and quartz crystal substrates to form a thin film chemical sensor element by using Langmuir-Blodgett (LB) technique. Quartz Crystal Microbalance, UV-Visible Spectroscopy, Atomic Force Microscopy and Scanning Electron Microscopy techniques were employed to characterize all these LB thin film layers. Fick's Equations were used for analyzing the swelling process of LB thin film sensor and diffusion coefficient values of organic vapours for swelling were obtained. The initial experiments have revealed that new triazine appended calix[4]arene derivative exhibited an effective chemical gas sensor characteristic with a large response to dichloromethane vapour. (C) 2019 Elsevier Ltd. All rights reserved.Research Foundation of Usak UniversityUsak University [2018/MF002]The financial support from the Research Foundation of Usak University (Project No: 2018/MF002) is gratefully acknowledged. Additionally, we thank UBATAM (Usak University, Scientific Analysis Technological Application and Research Center) for analyses

Comparison of radon concentrations in soil gas and indoor environment of Afyonkarahisar Province

It is well known that radon is the main source of natural radiation exposure to the population. Indoor radon concentrations in an area are affected by ascending radon migration following the convection of groundwater and soil gas along fractures and faults in the bedrock sediments. There are various studies showing that positive radon anomalies in the soil gas are found to coincide with the locations of houses showing the highest concentrations. Moreover, soil gas radon levels and soil permeability are important factors in determining the radon potential of an area, because high permeability enables the increased migration of radon from the soil into houses. Since radon in homes originates mainly from soil gas radon, it is of public interest to study the correlation between soil gas radon and indoor radon in different geographic locations. In the present work, a correlation study was carried in conjunction with radon concentrations in soil gas and indoor environment of Afyonkarahisar Province. The provincial center was assumed to be divided into four regions according to the rock types and tectonic structure to show also the geological structure effect on radon concentrations. The indoor radon concentrations were measured in 74 dwellings using CR-39 passive nuclear track detectors, and the radon concentrations in soil gas were determined in 243 drilled holes using AlphaGUARD detector. The correlation coefficient of 0.97 was obtained between radon concentrations in soil gas and indoor environment of Afyonkarahisar Province. © 2018, Saudi Society for Geosciences.Khalifa University of Science, Technology and Research, KU Türkiye Atom Enerjisi Kurumu: A5.H1.P1.06Funding information This work was supported by Turkish Atomic Energy Authority with the grant number A5.H1.P1.06 and Afyon Kocatepe University Science Research Projects Coordination Unit with the grant numbers 17.KARİYER.95, 14.FENBİL.08, and 12.FENBİL.14