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Yilmaz Ayberk,Alan Hatice Yilmaz,Susam Lidya Amon,Akkus Baki,ALMisned Ghada,Ilhan Taha Batuhan,Tekin H.O. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.12
The purpose of this comprehensive research is to observe the impact of scintillator crystal type on entire detection process. For this aim, MCNPX (version 2.6.0) is used for designing of a physical plastic scintillation detector available in our laboratory. The modelled detector structure is validated using previous studies in the literature. Next, different types of plastic scintillation crystals were assessed in the same geometry. Several fundamental detector properties are determined for six different plastic scintillation crystals. Additionally, the deposited energy quantities were computed using the MCNPX code. Although six scintillation crystals have comparable compositions, the findings clearly indicate that the crystal composed of PVT 80% þ PPO 20% has superior counting and detecting characteristics when compared to the other crystals investigated. Moreover, it is observed that the highest deposited energy amount, which is a result of the highest collision number in the crystal volume, corresponds to a PVT 80% þ PPO 20% crystal. Despite the fact that plastic detector crystals have similar chemical structures, this study found that performing advanced Monte Carlo simulations on the detection discrepancies within the structures can aid in the development of the most effective spectroscopy procedures by ensuring maximum efficiency prior to and during use.
Structural, Thermodynamic and Phonon Properties of SbSI and SbSBr Single Crystals
E. Kilit Dogan,M. Aycibin,S. Erden Gulebaglan,M. N. Secuk,B. Erdinc,H. Akkus 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.11
The structural, dynamical and thermodynamic properties of antimony sulfoiodide (SbSI) and antimonysulfobromide (SbSBr) are investigated by using an ab-initio pseudopotential method applyingdensity functional theory (DFT) within the local density approximation (LDA). The dynamicalproperties, such as the phonon dispersion and the phonon density of states, are calculated. Makinga factor group analysis we classify the phonon modes. Moreover, the thermodynamic properties,such as the entropy and the constant-volume specific heat, as functions of temperature and thephonon contribution to the free energy and the internal energy are calculated.