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RISS 인기검색어
- 검색키워드
- 저자 : Limkitjaroenporn, P. (검색결과 5 건)
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Pruittipol Limkitjaroenporn,Kittisak Sriwongsa,Wiraporn Hongtong,Wuttichai Chaiphaksa,Jakrapong Kaewkhao,HongJoo Kim 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.75 No.9
The present research work focuses on a comparative study of the non-proportionality of the elec- tron response and the electron energy resolution for LaBr3:Ce and LuYAP:Ce scintillating crystals in the energy range from 97.8 keV to 437.0 keV by using the Compton coincidence technique (CCT). The results reveal that the LaBr3:Ce crystal shows the higher yield than the LuYAP:Ce crystal. Non-proportional electron responses at 97.8 keV were 6% higher and 2% lower for the LaBr3:Ce and the LuYAP crystals, respectively. The percentage proportionality of the electron response decreases with increasing electron energy. The proportionality of the electron response has higher values at energies beyond 374.5 keV for the LaBr3:Ce crystal and 260.4 keV for the LuYAP:Ce crystal. The electron energy resolution of the LaBr3:Ce crystal is better than that of the LuYAP:Ce crystal in the energy range from 97.8 keV to 437.0 keV. However, at low electron energy the resolutions of the electron responses for both scintillating crystal show similar values. Both the LaBr3:Ce and the LuYAP scintillating crystals show electron energy resolutions proportional to 1= p E.
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Shamshad, L.,Rooh, G.,Limkitjaroenporn, P.,Srisittipokakun, N.,Chaiphaksa, W.,Kim, H.J.,Kaewkhao, J. Elsevier 2017 Progress in nuclear energy Vol.97 No.-
<P><B>Abstract</B></P> <P>The Gadolinium based oxide and oxyfluoride glass systems were prepared using conventional melt quenching method and studied for their radiation shielding properties. The mass attenuation coefficients (μ<SUB>m</SUB>), effective atomic numbers (Z<SUB>eff</SUB>) and effective electron densities (N<SUB>e</SUB>) of the glasses at different photon energies were calculated theoretically by WinXcom program and experimentally determined by the transmission method. Moreover, the mass attenuation coefficient was investigated using Geant4 Monte Carlo code and compared with each other. The gamma ray energies were varied by Compton scattering technique. The values of attenuation parameters of both the glass systems have been found to be decrease with the increase in gamma ray photon energy. The results show that, the experimental values of mass attenuation coefficients, effective atomic numbers and effective electron densities are in good agreement with the theoretical values. It seems that Geant4 values are systematically lower than WinXCom. It could be caused by the simplification of geometry in Geant4. Although, the oxide glass system have superior shielding properties than oxyfluoride glass system, but, still, it has better shielding properties than commercial window glass and some existing concretes indicating the potential of this glass to be used as gamma ray shielding material. Moreover, there is no effect of fluoride component on the optical spectra. The optical absorption spectra of the glass systems under investigation have been shown with light transparency which is an edge to be used as radiation shielding material.</P>
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Interaction of 662 keV Gamma-rays with Bismuth-based Glass Matrices
J. Kaewkhao,K. Kirdsiri,P. Limkitjaroenporn,P. Limsuwan,박정민,김홍주 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.22
In this work, the Bi_2O_3-SiO_2 glass system was synthesized by using the melt-quenching method. The radiation shielding properties of the glass samples at various levels of bismuth content were measured at 662 keV by usage a ^(137)Cs radioactive source, and comparisons were made with values theoretically calculated by usage WinXCom. The experimentally obtained values were generally in good agreement with the theoretical ones. Furthermore, a comparison was made to a lead-borate glass system with the same level of additive. The radiation shielding properties were found to be improved with increasing Bi_2O_3 concentration. The different values of Compton scattering yielded a higher total mass attenuation coefficient for the bismuth-silicate glass than for the bismuth-borate glass. These results reflect the potential usefulness of bismuth-based glasses as new materials for lead-free radiation-shielding glasses.
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New gadolinium based glasses for gamma-rays shielding materials
Kaewjang, S.,Maghanemi, U.,Kothan, S.,Kim, H.J.,Limkitjaroenporn, P.,Kaewkhao, J. North-Holland Pub. Co 2014 Nuclear engineering and design Vol.280 No.-
In this work, Gd<SUB>2</SUB>O<SUB>3</SUB> based glasses in compositions (80-x)B<SUB>2</SUB>O<SUB>3</SUB>-10SiO<SUB>2</SUB>-10CaO-xGd<SUB>2</SUB>O<SUB>3</SUB> (where x=15, 20, 25, 30 and 35mol%) have been fabricated and investigated for their radiation shielding, physical and optical properties. The density of the glass was found to increase with the increasing of Gd<SUB>2</SUB>O<SUB>3</SUB> concentration. The experimental values of mass attenuation coefficients (μ<SUB>m</SUB>), effective atomic number (Z<SUB>eff</SUB>) and effective electron densities (N<SUB>e</SUB>) of the glasses were found to increase with the increasing of Gd<SUB>2</SUB>O<SUB>3</SUB> concentration and also with the decreasing of photon energy from 223 to 662keV. The glasses of all Gd<SUB>2</SUB>O<SUB>3</SUB> compositions studied have been shown with lower HVL values in comparison to an X-rays shielding window, ordinary concrete and commercial window; indicating their potential as radiation shielding materials with Pb-free advantage. Optical spectra of the glasses in the present study had been shown with light transparency; an advantage when used as radiation shielding materials.
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