Fizik Mühendisliği Bölümü Koleksiyonu
https://hdl.handle.net/20.500.12440/99
2024-03-29T10:13:24Z
2024-03-29T10:13:24Z
Addressing student misconceptions about atoms and examining instructor strategies for overcoming them
Kaya, Ali
https://hdl.handle.net/20.500.12440/6079
2023-11-09T06:46:05Z
2023-01-01T00:00:00Z
Addressing student misconceptions about atoms and examining instructor strategies for overcoming them
Kaya, Ali
This paper is twofold. First, it examines the misconceptions held by students about atoms. Second, it determines the suggestions of the instructors (academics and teachers) to overcome these misconceptions. The study adopted a case study research method. A questionnaire was administered to 288 students and a semi-structured interview was conducted with 20 educators, including 10 teachers and 10 academics from the fields of physics and chemistry. A number of students were observed to have misconceptions about atoms, and they were unable to grasp the concept. This situation may have resulted from teaching students the theories of the atoms in a historically chronological order and ineffective methods of teaching. It was recommended that atomic models not be taught in primary school education, and that three new methods could be used in teaching this subject. © 2023, Duzce University, Faculty of Education. All rights reserved
2023-01-01T00:00:00Z
Calculation of radiation shielding parameters of YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors for the energies from 122 to 1332 keV using EGS4 code
Kaya, Selim
https://hdl.handle.net/20.500.12440/6047
2023-10-10T06:13:24Z
2023-01-01T00:00:00Z
Calculation of radiation shielding parameters of YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors for the energies from 122 to 1332 keV using EGS4 code
Kaya, Selim
This Study aims to evaluate the radiation shielding efficiency of YBa2Cu3O7 and Y3Ba5Cu8O18 superconducting ceramics. In the current study, the radiation shielding efficiency of YBa2Cu3O7 and Y3Ba5Cu8O18 superconducting ceramics were calculated using the EGS4 code and discussed experimentally and theoretically by comparing with XCOM data. The mass attenuation coefficients (μ/ρ) for YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors and their contents was investigated theoretically (EGS4 and WinXcom) and experimentally at gamma-ray energies from 122 to 1332 keV. The theoretical values have been computed in the energy range from 1 keV to 100 MeV using WinXcom program. Then, using the mass attenuation coefficients, it was determined some shielding parameters such as mean free path (MFP), half value layer (HVL), effective atomic number (Zeff), radiation protection efficiency (RPE) and gamma–ray kerma coefficients ((kγ). It has been seen that the theoretical and the empirical results were in agreement. The data and findings from this study can guide further research and development of shielding materials for gamma-ray and neutron shielding applications. © 2023 Elsevier B.V.
2023-01-01T00:00:00Z
Calculation of radiation shielding parameters of YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors for the energies from 122 to 1332 keV using EGS4 code
Kaya, Selim
https://hdl.handle.net/20.500.12440/6046
2023-10-10T06:11:28Z
2023-01-01T00:00:00Z
Calculation of radiation shielding parameters of YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors for the energies from 122 to 1332 keV using EGS4 code
Kaya, Selim
This Study aims to evaluate the radiation shielding efficiency of YBa2Cu3O7 and Y3Ba5Cu8O18 superconducting ceramics. In the current study, the radiation shielding efficiency of YBa2Cu3O7 and Y3Ba5Cu8O18 superconducting ceramics were calculated using the EGS4 code and discussed experimentally and theoretically by comparing with XCOM data. The mass attenuation coefficients (μ/ρ) for YBa2Cu3O7 and Y3Ba5Cu8O18 superconductors and their contents was investigated theoretically (EGS4 and WinXcom) and experimentally at gamma-ray energies from 122 to 1332 keV. The theoretical values have been computed in the energy range from 1 keV to 100 MeV using WinXcom program. Then, using the mass attenuation coefficients, it was determined some shielding parameters such as mean free path (MFP), half value layer (HVL), effective atomic number (Zeff), radiation protection efficiency (RPE) and gamma–ray kerma coefficients ((kγ). It has been seen that the theoretical and the empirical results were in agreement. The data and findings from this study can guide further research and development of shielding materials for gamma-ray and neutron shielding applications. © 2023 Elsevier B.V.
2023-01-01T00:00:00Z
Effect of detector crystal size on Compton suppression factors
Kaya, Selim
https://hdl.handle.net/20.500.12440/6045
2023-09-28T07:25:11Z
2023-01-01T00:00:00Z
Effect of detector crystal size on Compton suppression factors
Kaya, Selim
The geometrical parameters which affect the suppression factor for an HPGe (High Purity Germanium)-NaI Compton suppression spectrometer were studied by a Monte Carlo simulation with the EGS4 system. The spectrums were crated for 5 energy values ranging from 200 keV to 2 MeV. Compton suppression factors (CSFs), the parameters characterizing the system performance, were calculated for different HPGe crystal parameters. It was observed that to obtain better Compton suppressed factors, a laboratory must choose as small HPGe crystal as possible for energy values up to 400 keV. However, for higher energies up to 2 MeV, larger HPGe crystals provide better Compton suppression systems. These findings suggest that the choice of HPGe crystal size can significantly impact the performance of a Compton suppression spectrometer and should be carefully considered in its design and optimization. © 2023 Informa UK Limited, trading as Taylor & Francis Group.
2023-01-01T00:00:00Z