Sülfür hekzaflorür molekülünün elektron etkisi ile iyonlaşma ikili diferansiyel tesir kesitlerinin ölçümü

Sulfur hexafluoride (SF6) is a widely used insulator in the industry, but it also has a high global warming potential. Studying electron impact ionization of SF6, particularly measuring the energy and angular distributions of the collision products, can provide valuable information about the underlying physics of the collision process and the nature of SF6 molecule. In this study, double differential cross sections (DDCSs) for electron impact ionization of SF6 have measured using a crossed beam experimental setup. The incident electron beam, with an energy range of 50-350 eV, was directed towards a target gas composed of SF6, and scattered electrons were detected as a function of the energy and scattering angle. The findings of this study offer significant insights into the molecular structure of SF6 and will contribute to enhancing the understanding of charged particle interactions involving SF6Sülfür heksaflorür (SF6), küresel ısınma potansiyeli olmasına rağmen yalıtkanlık özellikleri nedeniyle endüstride sık kullanılan bir gazdır. SF6'nın elektron etkisi ile iyonlaşma çalışmaları, özellikle çarpışma sonucu açığa çıkan parçacıkların enerji ve açısal dağılımlarının ölçülmesi, iyonlaşma sürecinin temel fiziksel özellikleri ve SF6 molekülünün yapısı hakkında değerli bilgiler sağlamaktadır. Bu çalışmada, SF6'nın elektron etkisi ile iyonlaşma olayı için ikili diferansiyel tesir kesiti (DDCS) ölçümleri yapılmıştır. SF6 molekülü 50-350 eV enerjili elektronlar ile çarpıştırılarak ortaya çıkan elektronlar enerji ve saçılma açısının fonksiyonu olarak dedekte edilmiştir. Bu çalışmanın bulguları, SF6'ın moleküler yapısı hakkında önemli bilgiler sunmakta olup, molekülün yüklü parçacıklar ile olan etkileşimlerinin anlaşılmasına katkı sağlayacaktır

Determination of ındoor radon concentrations and annual effective dose equivalents at Afyon Kocatepe University Ahmet Necdet Sezer Campus

İnsanlar genelde zamanlarının %90’dan daha büyük bir kısmını kapalı ortamlarda geçirmektedirler. Kapalı ortamlarda radona maruz kalma sağlık açısından önemli bir problem olabilmektedir. Bu çalışmada Afyon Kocatepe Üniversitesi Ahmet Necdet Sezer Kampüsü’nde 6 fakülte binasında, çalışanların ve öğrencilerin sağlık risklerini değerlendirmek ve yıllık etkin doz eşdeğerlerini hesaplamak için radon konsantrasyonları ölçülmüştür. Ölçümler aktif ölçüm metoduyla ölçüm yapan Genitron marka AlphaGUARD PQ2000 PRO Radon Detektör Sisteminde gerçekleştirilmiştir. Fakülte binalarının radon konsantrasyonu değerleri 4.48-82.00 Bqm-3; ortalama radon konsantrasyonları ise 20.64-30.91 Bqm-3 aralığında belirlenmiştir. Tüm binaların ortalama radon konsantrasyonu 24.79 Bqm-3 olarak hesaplanmıştır. 6 fakülte binasının yıllık etkin doz eşdeğerleri 0.16-0.24 mSvy-1 aralığında belirlenmiş, ortalama yıllık etkin doz eşdeğeri ise 0.20 mSvy-1 olarak hesaplanmıştır. Elde edilen sonuçlar, kapalı ortamlarda radon gazı konsantrasyonları için Uluslararası Radyolojik Koruma Komisyon (ICRP) ve Türkiye Atom Enerjisi Kurumu (TAEK) tarafından tavsiye edilen limit değerlerle karşılaştırılmıştır. ANS Kampüsü’ndeki 6 fakülte binasının radon konsantrasyonlarının ölçüm sonuçları ve yıllık etkin doz eşdeğerleri, kuruluşlar tarafından izin verilen limit değerlerinin altında belirlenmiştir.People generally spend more than 90% of their time indoors. Exposure to radon in indoor environments can be a significant health problem. In this study, radon concentrations were measured to evaluate the health risks of employees and students in 6 faculty buildings in Afyon Kocatepe University Ahmet Necdet Sezer Campus and to calculate annual effective dose equivalents. Measurements were carried out in the Genitron AlphaGUARD PQ2000 PRO Radon Detector System which measures with active measurement method. The radon concentration values of the faculty buildings are 4.48-82.00 Bqm-3; mean radon concentrations were determined in the range of 20.64-30.91 Bqm-3. The average radon concentration of all buildings was calculated as 24.79 Bqm-3. The annual effective dose equivalents of 6 faculty buildings were determined in the range of 0.16-0.24 mSvy-1, and the average annual effective dose equivalent was calculated as 0.20 mSvy-1. The results were compared with the limit values recommended by the International Commission on Radiological Protection (ICRP) and the Turkish Atomic Energy Authority (TAEK) for radon gas concentrations in indoor environments. The measurement results of the radon concentrations and annual effective dose equivalents of the 6 faculty buildings on the ANS Campus were determined below the limit values allowed by the institutions

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

Electron-Photon Coincidence Technique for Atomic Collisions

A brief review is given on development of electron-photon coincidence studies from electron impact of atoms. The theory of electron-photon correlations is outlined in detail in terms of cross sections of excited atoms and excited state charge clouds. The state of a target atom is determined by the various orientation and alignment parameters and the multipole moments of the excited atom. General considerations, such as coherence effects in impact excitation, the influence of fine and hyperfine structures in correlations are taken into account. The relationship between scattering amplitudes (including their phases) and target parameters is worked out for singlet and doublet transitions

Electron-Photon Coincidence Technique for Atomic Collisions

A brief review is given on development of electron-photon coincidence studies from electron impact of atoms. The theory of electron-photon correlations is outlined in detail in terms of cross sections of excited atoms and excited state charge clouds. The state of a target atom is determined by the various orientation and alignment parameters and the multipole moments of the excited atom. General considerations, such as coherence effects in impact excitation, the influence of fine and hyperfine structures in correlations are taken into account. The relationship between scattering amplitudes (including their phases) and target parameters is worked out for singlet and doublet transitions

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

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