Epoksi Polimerlerin Gama Işını Zırhlama Performanslarına PbO ve BaO Katkılarının Etkisinin Deneysel Olarak Karşılaştırılması.

Yıl 2019, Sayı: 16, 256 - 266, 31.08.2019

Mehmet Kılıç , Yaren Ergin Yaşar Karabul Zeynep Güven Özdemir

https://doi.org/10.31590/ejosat.553952

Cited By: 2

Öz

Bu
çalışma, iki farklı katkı malzemesi (baryum oksit ve kurşun oksit) kullanılarak
hazırlanan epoksi kompozitlerinin gama ışını zırhlama yeteneklerini araştırmaya
yöneliktir. Düşük ağırlıklı radyasyon zırhlayıcısı elde etmek için Epoksi / PbO
ve Epoksi / BaO kompozitler, ağırlık olarak % 10, % 20 ve % 40 katkı malzemeleri
kullanılarak üretilmiştir. Hazırlanan numunelerin ağırlığı kurşun, çelik, beton
vb. bazı geleneksel zırhlayıcı malzemelerle karşılaştırılmıştır. Saf epoksi ve
kompozitlerin gama ışını zırhlama performansı deneysel olarak NaI (Tl)
detektörü kullanılarak ölçülmüştür. Deneylerde, gama ışını kaynağı olarak 81
keV ve 356 keV enerjili Ba-133 nokta radyoaktif kaynağı kullanılmıştır.
Kompozitlerin gama ışını zırhlama parametreleri olarak kütle azaltma katsayısı,
yarı kalınlık değeri, onda bir kalınlık değeri ve ortalama serbest yol mesafesi
dikkate alınmıştır. PbO ve BaO ilaveli epoksi kompozitlerinin ilgili
parametrelerinin sonuçları karşılaştırıldığında, PbO katkılı epoksi
kompozitinin gama ışını zırhlama performansının, BaO katkısıyla da elde
edilebileceğini ortaya çıkarmıştır. Bununla birlikte, PbO katkılı epoksi ile aynı
performansı elde etmek için, epoksiye PbO’ya göre iki katı kadar fazla BaO
katkılanmalıdır. Öte yandan, ağırlıkça % 40 BaO katkılı epoksi kompozitin, 81
keV ve 356 keV enerjili fotonlar için çelik, beton ve Gd₂O₃
nanoparçacık katkılanmış epoksi kompozitlerden daha iyi bir radyasyon zırhlama
performansı sergilediği tespit edilmiştir. Bu nedenle, bir epoksi/BaO kompoziti
kullanılarak düşük ağırlıklı ve toksik olmayan bir gama ışını zırhlama malzemesi
üretilebilir.

Anahtar Kelimeler

Kütle azaltma katsayısı, Epoksi Kompozit, PbO, BaO, HVL, TVL

Experimental Comparison of PbO and BaO Addition Effect on Gamma Ray Shielding Performance of Epoxy Polymer

Öz

This study was devoted to investigate the gamma ray
shielding abilities of the epoxy composites prepared by using two different
reinforcing materials: barium oxide and lead oxide.  The Epoxy/PbO and Epoxy/BaO composites were
produced by using 10 wt.%, 20 wt.%, and 40 wt.% reinforcing materials to obtain
low weight radiation shielders. The heaviness of the samples were compared with
some conventional shielding materials such as lead, steel, concrete etc. The
gamma ray shielding performance of the pure epoxy and the composites were
measured experimentally by using NaI(Tl) detector. In the experiments, Ba-133
point radioactive source was also utilized as a gamma ray source with the 81
keV and 356 keV energies. As the gamma ray shielding parameters of the
composites, the mass attenuation coefficient, half layer value and tenth layer
value thicknesses and mean free path distance were considered. After comparison
of the related parameters of the PbO and BaO added epoxy composites, it was
revealed that the gamma radiation shielding performance of the PbO added epoxy
composite can also be obtained by adding BaO to the epoxy. However, to achieve
the same performance, BaO should be added twice as much as the PbO additive
percentage. On the other hand, it was determined that 40 wt.% BaO added epoxy
composite exhibits a better radiation shielding performance than steel,
concrete and Gd₂O₃ nanoparticle added epoxy composite for
the photons with 81 keV and 356 keV energies. Thus, a lightweight and non-toxic
gamma-ray shielding material can be produced by using an epoxy/BaO composite.

Anahtar Kelimeler

Epoxy Composite, PbO, BaO, Mass attenuation coefficient, HVL, TVL

Kaynakça

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