Volcanic Rock Reinforced Epoxy Composites for Gamma Ray Shielding

Yıl 2019, Sayı: 15, 552 - 560, 31.03.2019

Hasret Kara Yaşar Karabul Mehmet Kılıç Orhan İçelli Zeynep Güven Özdemir

https://doi.org/10.31590/ejosat.521516

Cited By: 8

Öz

In the present study, gamma ray shielding capability of
epoxy resin polymer matrix was tried to enhance with three volcanic rock
powders collected from different regions of Van, Turkey. The chemical contents
of the volcanic rocks were determined by X-ray Fluorescence spectroscopy.  The novel epoxy/volcanic rock composites were
prepared with different volcanic rock contents varying from 0 % wt. to 40% wt. The
gamma ray shielding performances of the
samples were measured experimentally by NaI(Tl) detector for the photons with of 81 keV and
356 keV energies emitted from Ba-133 point radioactive source. The abilities of the samples
to shield gamma radiation were evaluated in terms their mass attenuation
coefficient, half layer value thickness and mean free path distance. It was
determined that the low cost epoxy/volcanic rock  composites have a promising potential to be
utilized as a radiation shielding medium for the gamma rays.  In particular, among all volcanic rock
additives the volcanic rock additive having the highest hematite content gained
the best gamma ray shielding ability to pure epoxy for both photon energies.

Anahtar Kelimeler

Epoxy Resin, Volcanic Rock, Composites, Mass attenuation coefficient, HVL

Gama Işını Koruması için Volkanik Kaya İle Güçlendirilmiş Epoksi Kompozitler

Öz

Bu çalışmada, epoksi reçine polimer matrisinin gama ışını
koruma kabiliyeti Van'ın farklı bölgelerinden toplanan üç volkanik kaya tozu
ile arttırılmaya çalışılmıştır. Volkanik kayaçların kimyasal içerikleri X-ışını
Floresans spektroskopisi ile belirlenmiştir. Ağırlıkça % 0’dan 40'a kadar
değişen oranlarda volkanik kaya içeren yeni epoksi / volkanik kaya kompozitler
hazırlanmıştır. Numunelerin gama ışını koruma performansları, Ba-133 nokta
radyoaktif kaynaktan yayılan 81 keV ve 356 keV enerjili fotonlar için deneysel
olarak NaI (Tl) detektörü ile ölçülmüştür. Numunelerin gama radyasyonunu koruma
yetenekleri kütle zayıflama katsayısı, yarı tabaka değeri kalınlığı ve ortalama
serbest yol mesafesi açısından değerlendirilmiştir. Düşük maliyetli epoksi / volkanik
kaya kompozitlerinin, gama ışınları için radyasyon koruyucu bir ortam olarak
kullanılacak umut verici bir potansiyele sahip olduğu tespit edilmiştir.
Özellikle, tüm volkanik kaya katkı maddeleri arasında, en yüksek hematit
içeriğine sahip olan volkanik kaya katkı maddesi, her iki foton enerjisinde saf
epoksiye  en iyi gama ışını koruma
kabiliyetini kazanmıştır.

Anahtar Kelimeler

Epoksi reçine, Volkanik Kaya, Kompozitler, Kütle Zayıflatma Katsayısı, HVL

Kaynakça

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