Theoretical Investigation of Gamma Attenuation Properties of Some Metal Oxides with GEANT4-GATE Simulation

Öz

This study investigated some oxide material's gamma radiation shielding properties. For this purpose, gamma radiation attenuation properties of composites formed by metal oxides MoO2, La2O3, PbO, and their mixtures were examined at 50 keV, 80 keV, 120 keV, 662 keV, 1173 keV, and 1332 keV energies. Calculations were made using the Geant4-based GATE simulation and compared with the XCOM program. Using the theoretically calculated mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half-value thickness (HVL), and mean free path (MFP) parameters were found. As a result of the study, it was seen that especially the Mo(80)LaPb mixture showed the best gamma shielding property with high MoO2 content.

Anahtar Kelimeler

• Gamma
• XCOM database
• Gate simulation
• Shielding

Bazı Metal Oksitlerin Gama Absorpsiyon Özelliklerinin GEANT4-GATE Simülasyon ile Teorik İncelenmesi

Öz

Bu çalışmada bazı oksit materyallerin gama radyasyon zırhlama özellikleri incelenmiştir. Bu amaçla; MoO2, La2O3, PbO metal oksitleri ve bunların karışımlarının oluşturduğu kompozitlerin gama radyasyonu zayıflatma özelliklerine, 50 keV, 80 keV, 120 keV, 662 keV, 1173 keV ve 1332 keV enerjilerde bakılmıştır. Hesaplamalar Geant4 tabanlı GATE simülasyon ile yapılarak XCOM programı ile karşılaştırılmıştır. Teorik olarak hesaplanan kütle zayıflatma katsayısından yararlanılarak (MAC), lineer soğurma katsayısı (LAC), yarıdeğer kalınlık (HVL), ortalama serbest yol (MFP) parametreleri bulunmuştur. Çalışma sonucunda özellikle, Mo(80)LaPb karışımında yüksek MoO2 içeriğiyle en iyi gama kalkanlama özelliği gösterdiği görülmüştür.

Anahtar Kelimeler

• Gamma
• XCOM veritabanı
• Gate simülasyon
• Zırhlama

Kaynakça

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