TY  - CONF
AU  - Kržanović, Nikola
AU  - Haralambos Apostolakopoulos, Filip
AU  - Perazić, Luka
AU  - Stanković, Koviljka
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11917
AB  - Following the requirements of radiation protection international standards, passive dosimetry systems are type tested, which includes the angular dependence. As it represents one of the most important dosimeter characteristics, the angular dependence of commercially available optically stimulated luminescent dosimeters has been examined in this paper. The empirically determined air kerma to the personal dose equivalent conversion coefficients decrease as the angle of incidence increases. It was anticipated that the dosimeter response would show a similar behavior. This expectation has been confirmed for all the used angles of incidence and energies of the primary X-ray beam, except for the 80° angle of incidence and the 33 keV and 48 keV mean photon energies, where an increase in the angular response has been observed.
PB  - Belgrade : ETRAN Society
C3  - IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Low-energy X-ray Angular Response of Optically Stimulated Luminescent Dosimeters
SP  - 1005
EP  - 1007
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11917
ER  - 

@conference{
author = "Kržanović, Nikola and Haralambos Apostolakopoulos, Filip and Perazić, Luka and Stanković, Koviljka",
year = "2018",
abstract = "Following the requirements of radiation protection international standards, passive dosimetry systems are type tested, which includes the angular dependence. As it represents one of the most important dosimeter characteristics, the angular dependence of commercially available optically stimulated luminescent dosimeters has been examined in this paper. The empirically determined air kerma to the personal dose equivalent conversion coefficients decrease as the angle of incidence increases. It was anticipated that the dosimeter response would show a similar behavior. This expectation has been confirmed for all the used angles of incidence and energies of the primary X-ray beam, except for the 80° angle of incidence and the 33 keV and 48 keV mean photon energies, where an increase in the angular response has been observed.",
publisher = "Belgrade : ETRAN Society",
journal = "IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Low-energy X-ray Angular Response of Optically Stimulated Luminescent Dosimeters",
pages = "1005-1007",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11917"
}

Kržanović, N., Haralambos Apostolakopoulos, F., Perazić, L.,& Stanković, K.. (2018). Low-energy X-ray Angular Response of Optically Stimulated Luminescent Dosimeters. in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society., 1005-1007.
https://hdl.handle.net/21.15107/rcub_vinar_11917

Kržanović N, Haralambos Apostolakopoulos F, Perazić L, Stanković K. Low-energy X-ray Angular Response of Optically Stimulated Luminescent Dosimeters. in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2018;:1005-1007.
https://hdl.handle.net/21.15107/rcub_vinar_11917 .

Kržanović, Nikola, Haralambos Apostolakopoulos, Filip, Perazić, Luka, Stanković, Koviljka, "Low-energy X-ray Angular Response of Optically Stimulated Luminescent Dosimeters" in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2018):1005-1007,
https://hdl.handle.net/21.15107/rcub_vinar_11917 .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Haralambos Apostolakopoulos, Filip
AU  - Đaletić, Miloš
AU  - Živanović, Miloš
AU  - Stanković, Koviljka
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11918
AB  - —Survey meters represent common radiation protection instruments used for ambient monitoring. They estimate the effective dose of occupationally exposed personnel, by measuring the ambient dose equivalent. A performance testing of a Geiger-Müller tube-based survey meter was realized in this paper. The energy and the dose rate dependence were determined for different thicknesses of lead tube wrappings, in order to achieve the optimal energy compensation. The energy response for higher-energy photons slightly improved by applying these filters, while it significantly worsened for low-energy X-rays. The angular dependence was tested in terms of angular response and its symmetry for different radiation qualities.
PB  - Belgrade : ETRAN Society
C3  - IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Energy, Angular and Dose-rate Dependence of the GM Survey Meter Response
SP  - 1008
EP  - 1011
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11918
ER  - 

@conference{
author = "Kržanović, Nikola and Haralambos Apostolakopoulos, Filip and Đaletić, Miloš and Živanović, Miloš and Stanković, Koviljka",
year = "2018",
abstract = "—Survey meters represent common radiation protection instruments used for ambient monitoring. They estimate the effective dose of occupationally exposed personnel, by measuring the ambient dose equivalent. A performance testing of a Geiger-Müller tube-based survey meter was realized in this paper. The energy and the dose rate dependence were determined for different thicknesses of lead tube wrappings, in order to achieve the optimal energy compensation. The energy response for higher-energy photons slightly improved by applying these filters, while it significantly worsened for low-energy X-rays. The angular dependence was tested in terms of angular response and its symmetry for different radiation qualities.",
publisher = "Belgrade : ETRAN Society",
journal = "IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Energy, Angular and Dose-rate Dependence of the GM Survey Meter Response",
pages = "1008-1011",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11918"
}

Kržanović, N., Haralambos Apostolakopoulos, F., Đaletić, M., Živanović, M.,& Stanković, K.. (2018). Energy, Angular and Dose-rate Dependence of the GM Survey Meter Response. in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society., 1008-1011.
https://hdl.handle.net/21.15107/rcub_vinar_11918

Kržanović N, Haralambos Apostolakopoulos F, Đaletić M, Živanović M, Stanković K. Energy, Angular and Dose-rate Dependence of the GM Survey Meter Response. in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2018;:1008-1011.
https://hdl.handle.net/21.15107/rcub_vinar_11918 .

Kržanović, Nikola, Haralambos Apostolakopoulos, Filip, Đaletić, Miloš, Živanović, Miloš, Stanković, Koviljka, "Energy, Angular and Dose-rate Dependence of the GM Survey Meter Response" in IcETRAN 2018 : 5th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2018):1008-1011,
https://hdl.handle.net/21.15107/rcub_vinar_11918 .

TY  - CONF
AU  - Haralambos Apostolakopoulos, Filip
AU  - Kržanović, Nikola
AU  - Perazić, Luka
AU  - Stanković, Koviljka
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11914
AB  - Determination of the angular dependence of thermoluminescent (TL) and optically stimulated luminescent (OSL) dosimeters is of great importance for their application in poly-energetic multidirectional photon radiation fields. In order to determine the angular dependence of the dosimeter responses for different photon energies, the dosimeters were mounted on an ISO water slab phantom, irradiated in two narrow beam X-ray qualities (N-40 and N-80) and in one gamma ray quality (S-Cs), defined in IAEA SRS 16. The angles of incidence ranged from 0° to 60°, with an increment of 20°. Two types of TL dosimeters were used: MTS-N (LiF:Mg,Ti) and MCP-N (LiF:Mg,Cu,P) and one type of OSL dosimeters, InLight (Al2O3:C). The two types of TL dosimeters have shown a similar deviation from their 0° responses for all the used radiation qualities, while the OSL dosimeters have shown a greater deviation from the reference values for the gamma radiation quality.
PB  - Belgrade : ETRAN Society
C3  - IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Comparison of the Angular Response of Thermoluminescent and Optically Stimulated Luminescent Personal Dosimeters
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11914
ER  - 

@conference{
author = "Haralambos Apostolakopoulos, Filip and Kržanović, Nikola and Perazić, Luka and Stanković, Koviljka",
year = "2017",
abstract = "Determination of the angular dependence of thermoluminescent (TL) and optically stimulated luminescent (OSL) dosimeters is of great importance for their application in poly-energetic multidirectional photon radiation fields. In order to determine the angular dependence of the dosimeter responses for different photon energies, the dosimeters were mounted on an ISO water slab phantom, irradiated in two narrow beam X-ray qualities (N-40 and N-80) and in one gamma ray quality (S-Cs), defined in IAEA SRS 16. The angles of incidence ranged from 0° to 60°, with an increment of 20°. Two types of TL dosimeters were used: MTS-N (LiF:Mg,Ti) and MCP-N (LiF:Mg,Cu,P) and one type of OSL dosimeters, InLight (Al2O3:C). The two types of TL dosimeters have shown a similar deviation from their 0° responses for all the used radiation qualities, while the OSL dosimeters have shown a greater deviation from the reference values for the gamma radiation quality.",
publisher = "Belgrade : ETRAN Society",
journal = "IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Comparison of the Angular Response of Thermoluminescent and Optically Stimulated Luminescent Personal Dosimeters",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11914"
}

Haralambos Apostolakopoulos, F., Kržanović, N., Perazić, L.,& Stanković, K.. (2017). Comparison of the Angular Response of Thermoluminescent and Optically Stimulated Luminescent Personal Dosimeters. in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society..
https://hdl.handle.net/21.15107/rcub_vinar_11914

Haralambos Apostolakopoulos F, Kržanović N, Perazić L, Stanković K. Comparison of the Angular Response of Thermoluminescent and Optically Stimulated Luminescent Personal Dosimeters. in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2017;.
https://hdl.handle.net/21.15107/rcub_vinar_11914 .

Haralambos Apostolakopoulos, Filip, Kržanović, Nikola, Perazić, Luka, Stanković, Koviljka, "Comparison of the Angular Response of Thermoluminescent and Optically Stimulated Luminescent Personal Dosimeters" in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2017),
https://hdl.handle.net/21.15107/rcub_vinar_11914 .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Haralambos Apostolakopoulos, Filip
AU  - Živanović, Miloš
AU  - Vujisić, Miloš
AU  - Stanković, Koviljka
AU  - Lazarević, Đorđe
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11916
AB  - Prior to performing calibrations in the Secondary Standard Dosimetry Laboratory (SSDL), standard radiation qualities must be determined in order to accurately assess the absorbed dose of occupationally exposed personnel and to evaluate the performance of radiation measurement instruments. Due to the energy dependence of the calibration factor and the air kerma to the personal dose equivalent conversion factor, it is of great importance to properly establish standard radiation qualities. Radiation qualities can be characterized by determining their photon energy distributions, or by using the Xray tube voltage and the first and second half-value layers. In this paper, the half-value layers were determined by varying the thicknesses of the additional filtration absorbers. The calculated values show a deviation from the ISO standard values not greater than 6%.
PB  - Belgrade : ETRAN Society
C3  - IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Establishing Standard X-ray Narrow-beam Radiation Qualities in the Secondary Standard Dosimetry Laboratory
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11916
ER  - 

@conference{
author = "Kržanović, Nikola and Haralambos Apostolakopoulos, Filip and Živanović, Miloš and Vujisić, Miloš and Stanković, Koviljka and Lazarević, Đorđe",
year = "2017",
abstract = "Prior to performing calibrations in the Secondary Standard Dosimetry Laboratory (SSDL), standard radiation qualities must be determined in order to accurately assess the absorbed dose of occupationally exposed personnel and to evaluate the performance of radiation measurement instruments. Due to the energy dependence of the calibration factor and the air kerma to the personal dose equivalent conversion factor, it is of great importance to properly establish standard radiation qualities. Radiation qualities can be characterized by determining their photon energy distributions, or by using the Xray tube voltage and the first and second half-value layers. In this paper, the half-value layers were determined by varying the thicknesses of the additional filtration absorbers. The calculated values show a deviation from the ISO standard values not greater than 6%.",
publisher = "Belgrade : ETRAN Society",
journal = "IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Establishing Standard X-ray Narrow-beam Radiation Qualities in the Secondary Standard Dosimetry Laboratory",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11916"
}

Kržanović, N., Haralambos Apostolakopoulos, F., Živanović, M., Vujisić, M., Stanković, K.,& Lazarević, Đ.. (2017). Establishing Standard X-ray Narrow-beam Radiation Qualities in the Secondary Standard Dosimetry Laboratory. in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society..
https://hdl.handle.net/21.15107/rcub_vinar_11916

Kržanović N, Haralambos Apostolakopoulos F, Živanović M, Vujisić M, Stanković K, Lazarević Đ. Establishing Standard X-ray Narrow-beam Radiation Qualities in the Secondary Standard Dosimetry Laboratory. in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2017;.
https://hdl.handle.net/21.15107/rcub_vinar_11916 .

Kržanović, Nikola, Haralambos Apostolakopoulos, Filip, Živanović, Miloš, Vujisić, Miloš, Stanković, Koviljka, Lazarević, Đorđe, "Establishing Standard X-ray Narrow-beam Radiation Qualities in the Secondary Standard Dosimetry Laboratory" in IcETRAN 2017 : 4th International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2017),
https://hdl.handle.net/21.15107/rcub_vinar_11916 .

TY  - CONF
AU  - Haralambos Apostolakopoulos, Filip
AU  - Kržanović, Nikola
AU  - Perazić, Luka
AU  - Živanović, Miloš
AU  - Stanković, Koviljka
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11915
AB  - Determination of the response of thermoluminescent and electronic personal dosimeters as a function of photon energy and angle of incidence has a crucial impact on their application in poly-energetic multidirectional photon radiation fields. In the experimental part of this paper, in order to determine the energy dependence of the dosimeter responses, the dosimeters were mounted on an ISO slab phantom, irradiated in X and gamma ray fields, defined in the IAEA SRS 16, within the energy range of 33 keV - 1,25 MeV. Tested dosimeters have not shown an adequate response in the low photon energies relative to their Cs-137 responses, while in the middle and high energy photon ranges they performed well and have shown a deviation relative to their Cs-137 responses up to ±20%. In order to determine the angular dependence of the dosimeters the N-200 narrow beam radiation quality has been used. The angles of incidence for which the dosimeters were tested range from 0° to 80°, with an increment of 20°. Most of the dosimeters have behaved as expected, except for certain dosimeters due to their significant increase in response caused by the influence of the scattered radiation.
PB  - Belgrade : ETRAN Society
C3  - IcETRAN 2016 : 3rd International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
T1  - Comparison of the Energy and Angular Responses of Thermoluminescent and Electronic Personal Dosimeters
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11915
ER  - 

@conference{
author = "Haralambos Apostolakopoulos, Filip and Kržanović, Nikola and Perazić, Luka and Živanović, Miloš and Stanković, Koviljka",
year = "2016",
abstract = "Determination of the response of thermoluminescent and electronic personal dosimeters as a function of photon energy and angle of incidence has a crucial impact on their application in poly-energetic multidirectional photon radiation fields. In the experimental part of this paper, in order to determine the energy dependence of the dosimeter responses, the dosimeters were mounted on an ISO slab phantom, irradiated in X and gamma ray fields, defined in the IAEA SRS 16, within the energy range of 33 keV - 1,25 MeV. Tested dosimeters have not shown an adequate response in the low photon energies relative to their Cs-137 responses, while in the middle and high energy photon ranges they performed well and have shown a deviation relative to their Cs-137 responses up to ±20%. In order to determine the angular dependence of the dosimeters the N-200 narrow beam radiation quality has been used. The angles of incidence for which the dosimeters were tested range from 0° to 80°, with an increment of 20°. Most of the dosimeters have behaved as expected, except for certain dosimeters due to their significant increase in response caused by the influence of the scattered radiation.",
publisher = "Belgrade : ETRAN Society",
journal = "IcETRAN 2016 : 3rd International Conference on Electrical, Electronic and Computing Engineering; Proceedings book",
title = "Comparison of the Energy and Angular Responses of Thermoluminescent and Electronic Personal Dosimeters",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11915"
}

Haralambos Apostolakopoulos, F., Kržanović, N., Perazić, L., Živanović, M.,& Stanković, K.. (2016). Comparison of the Energy and Angular Responses of Thermoluminescent and Electronic Personal Dosimeters. in IcETRAN 2016 : 3rd International Conference on Electrical, Electronic and Computing Engineering; Proceedings book
Belgrade : ETRAN Society..
https://hdl.handle.net/21.15107/rcub_vinar_11915

Haralambos Apostolakopoulos F, Kržanović N, Perazić L, Živanović M, Stanković K. Comparison of the Energy and Angular Responses of Thermoluminescent and Electronic Personal Dosimeters. in IcETRAN 2016 : 3rd International Conference on Electrical, Electronic and Computing Engineering; Proceedings book. 2016;.
https://hdl.handle.net/21.15107/rcub_vinar_11915 .

Haralambos Apostolakopoulos, Filip, Kržanović, Nikola, Perazić, Luka, Živanović, Miloš, Stanković, Koviljka, "Comparison of the Energy and Angular Responses of Thermoluminescent and Electronic Personal Dosimeters" in IcETRAN 2016 : 3rd International Conference on Electrical, Electronic and Computing Engineering; Proceedings book (2016),
https://hdl.handle.net/21.15107/rcub_vinar_11915 .