P2O5 Katkılı Lityum Alüminyum Silikat (LAS) Cam Sistemlerinin Nükleer Radyasyon Zırhlamasına Etkisi

Yıl 2019, Sayı: 17, 530 - 538, 31.12.2019

Gülfem Süsoy Doğan

https://doi.org/10.31590/ejosat.638450

Cited By: 1

Öz

Bu çalışmada, XCOM veritabanının Windows sürümü olan WinXCom programı kullanılarak
LAS (lityum-alüminyum-silikat) Li₂O-Al₂O₃-SiO₂
cam örneklerinin zırhlama parametreleri hesaplanmıştır. Kullanılan cam
örneklerinde P₂O₅ konsantrasyonunun artan yüzde oranının zırhlama
parametreleri üzerindeki değişim etkisi incelenmiştir. Gama ışını için
malzemelerin koruyusu etkisi, malzemelerin zırhlama etkilerini anlamada kilit
rol oynayan birkaç farklı zırhlama parametresi yardımıyla yorumlanabilir. µ_m=μ/ρ ile tanımlanan kütle zayıflama katsayısı, zırhlama
parametrelerini hesaplamak için kullanılan en temel katsayıdır. Bu parametreler
ortalama serbest yol (MFP), yarı değer katmanı (HVL), onuncu değer katmanı
(TVL), etkili elektron numarası (N_e) ve eşdeğer atom numarasıdır (Z_eq).
Ayrıca maruz kalma faktörü (EBF) ve GP fitleme parametreleri de Li₂O-Al₂O₃-SiO₂
cam örnekleri için logaritmik enterpolasyon yöntemi ve Z_eq değerinin
kullanılması ile hesaplanmıştır. Li₂O-Al₂O₃-SiO₂
cam örnekleri için EBF değerleri, N_e ile ters bir ilişki
göstermektedir. Ayrıca, P1 cam örneği için EBF değeri maksimum değeri alırken (en
az N_e), P6 cam örneği için minimum
EBF değeri (en yüksek N_e) hesaplanır. Seçilen camlar
için farklı zırhlama parametrelerinde gözlenen değişiklik, madde ile üç
etkileşim göz önünde bulundurularak yorumlanmaktadır bu etkileşimler fotoelektrik
etki, Compton saçılması ve çift oluşumdur. Elde edilen sonuçlar, kütle
zayıflatma katsayısı (µ_m) değerinin fotonun
enerjisine, cam örneklerinin kimyasal bileşimine ve zırhlama malzemelerinin
yoğunluğuna bağlı olduğunu göstermektedir. En yüksek P₂O₅
konsantrasyonuna sahip olan P6 cam numunesinin diğer Li₂O-Al₂O₃-SiO₂
cam örnekleri arasından nükleer radyasyon koruma kabiliyeti bakımından en
etkili cam numunesi olduğunu açıkça görülmektedir.

Anahtar Kelimeler

P2O5; gamma zırhlama; EBF.

Effect of P2O5 Additive on Nuclear Radiation Shielding Behaviors of Lithium Aluminum Silicate (LAS) Glass System

Öz

In this work,
shielding parameters of LAS (lithium-aluminum-silicate) Li₂O-Al₂O₃-SiO₂
glass samples have been reported with the help of the WinXCom code, a Windows
version of the XCOM database. The effect of increasing P₂O₅
concentration on the shielding parameters has been examined in the used Li₂O-Al₂O₃-SiO₂
glass samples. The shielding effectuality
of the materials for
gamma-ray can be interpreted with the
help of several different attenuation parameters which plays key role in
understanding the shielding capabilities of the material. The mass attenuation
coefficient, defined by µ_m=μ/ρ, is the most basic coefficient used to
calculate the shielding parameters. These parameters are the mean free path (MFP),
half value layer (HVL), tenth value layer (TVL), effective electron number (N_e)
and equivalent atomic
number (Z_eq). The exposure buildup factor
(EBF) and GP fitting parameters are also calculated by the method of
logarithmic interpolation using Z_eq of a Li₂O-Al₂O₃-SiO₂
glass system. The EBF values for Li₂O-Al₂O₃-SiO₂
glass samples show an inverse relation with N_e. Further, P1 (least N_e)
offers maximum values of EBF and P6 (highest N_e) offers minimum EBF
values. The change in different shielding parameters for
the selected glasses was interpreted by considering three interactions with the
substance (Photoelectric effect, Compton scattering and pair production). The
obtained results show that the µ_m strongly depends on the photon
energy, chemical composition and density of the shielding materials. It is clear to see that P6 glass
sample having the highest P₂O₅ concentration is the most
effective glass sample among the other glasses of Li₂O-Al₂O₃-SiO₂ system in nuclear radiation shielding ability.   

Anahtar Kelimeler

P2O5; gamma shielding; EBF;

Kaynakça

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