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1

Synthesis, Characterization and Luminescence Properties οf Sr_3WO_6:Eu^{3+} Phosphor

100%

Emen F., Altinkaya R., Sonmez, S., Kulcu N.

Acta Physica Polonica A

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2012

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vol. 121

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issue 1

249-250

EN

Sr_3WO_6:Eu^{3+} phosphor was prepared at high temperature by solid state method. The phase structure of phosphor was characterized as double perovskite structure. The cell parameters of Sr_3WO_6:Eu^{3+} were determined as a = 8.361 Å, b = 8.288 Å, c = 8.211 Å, α = β = γ = 89.78°. The luminescence properties were studied. The results revealed that Eu^{3+} ions show red emission about 616 nm.

2

Comparison of Radiation Properties of Tungsten and Additive Metal Coatings on 321 Stainless Steel Substrate

76%

Demir E., Karabas M., Sonmez S., Tugrul A., Ovecoglu M., Buyuk B.

Acta Physica Polonica A

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2017

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vol. 131

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issue 1

71-73

EN

In the present work, the gamma and neutron attenuation behaviors of tungsten, tungsten copper, and tungsten boron-carbide coatings on 321 stainless steel substrate were investigated against Cs-137 and Co-60 gamma radioisotopes and Pu-Be neutron source. The experimental results were compared and evaluated with pure 321 stainless steel to obtain gamma and neutron shielding properties of the coating materials. Tungsten, tungsten copper, and tungsten boron-carbide coatings on 321 stainless steel substrate were fabricated by atmospheric plasma spraying technique. Gamma and neutron transmission technique were used in this study to investigate the radiation behaviors of the coated materials. Linear attenuation coefficients of coated samples were carried out for Pu-Be neutron source. Transmittance values for each specimen were calculated at 0.662 MeV and 1.25 MeV gamma energies. The experimental results were evaluated for radiation shielding properties of the coated samples against gamma and neutron source with pure 321 stainless steel.

3

Assessment on Gamma Attenuation Behavior of W-VC-C and W-VC-TiC-C Composites for Co-60 Radioisotope

76%

Demir E., Tugrul A., Sonmez S., Ovecoglu L., Buyuk B., Yilmaz O.

Acta Physica Polonica A

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2017

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vol. 132

|

issue 3

830-832

EN

In this study, tungsten-vanadium carbide-graphite (W-VC-C) and tungsten-vanadium carbide-titanium carbide-graphite composite (W-VC-TiC-C) materials were investigated against Co-60 gamma radioisotope. The composite materials which are used in advanced technological studies and high temperature applications in many various fields especially in the areas of fission and fusion armor materials were produced by mechanical alloying method as in two groups. One of them include 93% tungsten (W), 6% vanadium carbide (VC) and 1% graphite (C) also which has three different alloying times (6-12-24 h). Other group of the samples was composed of 91% tungsten, 6% vanadium carbide (VC), 2% titanium carbide (TiC) and 1% graphite (C) also which has three different alloying times (6-12-24 h) and sintered at 1750°C. Co-60 gamma radioisotope source and gamma transmission technique were used in the experiments to investigate the properties of the composite materials. The mass attenuation coefficients of the samples were determined by using experimental results and theoretical mass attenuation coefficients were calculated from XCOM computer code. It can be concluded that increasing the tungsten ratio causes higher mass attenuation coefficient and the composite materials have provided us benefits better than lead for radiation gamma shielding.

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3 Acta Physica Polonica A

2 2017

1 2012

2 Buyuk B.

2 Demir E.

2 Sonmez S.

2 Tugrul A.

1 Altinkaya R.

1 Emen F.

1 Karabas M.

1 Kulcu N.

1 Ovecoglu L.

1 Ovecoglu M.

1 Sonmez, S.

1 Yilmaz O.

Synthesis, Characterization and Luminescence Properties οf Sr_3WO_6:Eu^{3+} Phosphor

Comparison of Radiation Properties of Tungsten and Additive Metal Coatings on 321 Stainless Steel Substrate

Assessment on Gamma Attenuation Behavior of W-VC-C and W-VC-TiC-C Composites for Co-60 Radioisotope