Radyasyon Doz Ölçümleri̇ ve Dozi̇metreler
Yükleniyor...
Dosyalar
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Fen Bilimleri Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Radyasyon doz ölçümleri, iyonlaştırıcı radyasyona maruz kalan canlı dokuların, alınan doz
miktarına göre aldığı hasarların belirlenmesinde hayati önem taşır. Bu nedenle, doz ölçümlerinde
kullanılan dozimetrelerin geliştirilmesi ve sınıflandırılması önemlidir. Doz ölçümleri, sağlık alanında
tedavi amaçlı, radyasyondan korunma amaçlı, arkeolojik kalıntıların ve tarihi materyallerin yaş tayininde
ve uzay araştırmalarında geniş şekilde kullanılmaktadır. Dozimetri kullanımı için, amaca en uygun ve en
doğru kullanımın yapılabilmesi için, yapılan araştırmalar önemlidir. Bu çalışmada, dozimetrelerin
kullanım amacına göre ve fiziksel özelliklerine göre bir sınıflandırılması yapılmıştır. Ayrıca, günümüzde
en çok kullanılan dozimetreler TLD (Termolüminesans Dozimetre) ve OSL (Optiksel Uyarmalı
Dozimetre) dozimetrelerin fiziksel özellikleri ve doz ölçüm metodları ayrıntılı olarak incelenmiştir. Doz
ölçümlerine örnek olarak 5 farklı ISO 4037 standardına sahip yüzük dozimetre (ISO Rad Fantom) ve
RADKOR ext dose OSL dosimetre okuyucusu sistemi kullanılmıştır. Bu çalışmada, ışınlanan yüzük
dozimetrelerinde cilt dozu (Hp(0,07)) ölçümleri test standardı ISO IEC 62387 baz alınarak
gerçekleştirilmiştir. Dozimetrelerin ışınlanma işlemi ISO 4037-3 baz alınarak Cs-137 ve farklı enerjilerde
X-ray (N-40, N-60, N-80, N-100, N-120 ve N-150) ışın setleri kullanılarak gerçekleştiril-miştir. Farklı
foton enerjilerindeki doz okuma sonuçları ISO 62387 stanadrdına göre enerji testi veya ISO 14146
standardına göre performans testlerine göre analiz edilmiştir.
Doz hızı artırıldığında ışınlanma süresinin kısaldığını gözledik. Altı farklı kaynaktan ışınlanan
dozlar beş farklı yüzük dozimetre ile ölçülmüş ve bunlar dozimetre okuyucu sistemi tarafından
okunmuştur. Yüzük dozimetrelerin ışınlanan ve ölçülen dozlar arasında kararlılık ve güvenirlik
belirlenmiştir. Standartlara uygun olarak geliştirilmiş ve kullanıma hazırlanmış kişisel dozimetrelerin
güvenle kullanılabileceği sonucuna varılmıştır.
Dose measurements are vitally important to determine the damage in living tissues exposed to ionizing radiation. Therefore, it is important to develop and classify the dosimeters used in dose measurements. Dose measurements are widely used for therapeutic purposes in the field of health, radiation protection, age determination of archaeological remnants, historical materials, and in space research. For the use of dosimetry, researches are important to make the most appropriate and accurate use. In this study, a classification of dosimeters according to their intended use and their physical properties has been made. In addition, the physical properties and dose measurement methods of the mostly used dosimeters TLD (Thermoluminescence Dosimeter) and OSL (Optically Stimulated Dosimeter) dosimeters were examined in detail. As an example of dose measurements, a ring dosimeter (ISO Rad Phantom) and a RADKOR ext dose OSL dosimeter reader system with 5 different ISO 4037 standards were used for dose measurements. In this study, skin dose (Hp(0,07)) measurements in irradiated ring dosimeters were performed based on the test standard ISO IEC 62387. The irradiation process of the dosimeters was carried out based on ISO 4037-3, using Cs-137 and X-ray (N-40, N-60, N-80, N-100, N-120 and N-150) beam sets of different energies. The dose reading results for different photon energies were analyzed according to the energy test according to ISO 62387 standard or performance tests according to ISO 14146 standard. We observed that, the irradiation time was shortened when the dose rate was increased. The doses irradiated from six different sources were measured with five different ring dosimeters and they were read by the dosimeter reader system. The stability and reliability of the ring dosimeters between the irradiated and the decanted were determined. It was concluded that personal dosimeters developed in accordance with the standards and prepared for use can be used safely.
Dose measurements are vitally important to determine the damage in living tissues exposed to ionizing radiation. Therefore, it is important to develop and classify the dosimeters used in dose measurements. Dose measurements are widely used for therapeutic purposes in the field of health, radiation protection, age determination of archaeological remnants, historical materials, and in space research. For the use of dosimetry, researches are important to make the most appropriate and accurate use. In this study, a classification of dosimeters according to their intended use and their physical properties has been made. In addition, the physical properties and dose measurement methods of the mostly used dosimeters TLD (Thermoluminescence Dosimeter) and OSL (Optically Stimulated Dosimeter) dosimeters were examined in detail. As an example of dose measurements, a ring dosimeter (ISO Rad Phantom) and a RADKOR ext dose OSL dosimeter reader system with 5 different ISO 4037 standards were used for dose measurements. In this study, skin dose (Hp(0,07)) measurements in irradiated ring dosimeters were performed based on the test standard ISO IEC 62387. The irradiation process of the dosimeters was carried out based on ISO 4037-3, using Cs-137 and X-ray (N-40, N-60, N-80, N-100, N-120 and N-150) beam sets of different energies. The dose reading results for different photon energies were analyzed according to the energy test according to ISO 62387 standard or performance tests according to ISO 14146 standard. We observed that, the irradiation time was shortened when the dose rate was increased. The doses irradiated from six different sources were measured with five different ring dosimeters and they were read by the dosimeter reader system. The stability and reliability of the ring dosimeters between the irradiated and the decanted were determined. It was concluded that personal dosimeters developed in accordance with the standards and prepared for use can be used safely.
Açıklama
Anahtar Kelimeler
Radyasyon, Yüzük dozimetre, Rad Fantom, OSL, Radiation, Ring dosimeter, Rad Fantom
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Alsfook, W. K. M., (2022). Radyasyon Doz Ölçümleri̇ ve Dozi̇metreler. (Yüksek Lisans Tezi). Selçuk Üniversitesi, Fen Bilimleri Enstitüsü, Konya.
