Fundamental characteristics of the plastic scintillating fiber (PSF) as a detector for electromagnetic radiation (X & γ) are obtained by GEANT4 detector simulation tool package. The detector response to radiation...Fundamental characteristics of the plastic scintillating fiber (PSF) as a detector for electromagnetic radiation (X & γ) are obtained by GEANT4 detector simulation tool package. The detector response to radiation with energy of 10~400 keV is found out. Energy deposition as well as detector efficiency (DE) of the PSF are studied. In order to make linear array of the PSF for imaging purpose, the optimum length of fiber is also estimated.展开更多
The characterization of sulfonated polyetherketone (SPEK-C) films was investigated by using positronannihilation lifetime spectroscopy (PALS) and atomic force microscopy (AFM). It was found that free volume radiusand ...The characterization of sulfonated polyetherketone (SPEK-C) films was investigated by using positronannihilation lifetime spectroscopy (PALS) and atomic force microscopy (AFM). It was found that free volume radiusand intensity depend on the variation of sulfonation degree and solvent evaporation time of the films. Pore size anddistribution determined from PALS and AFM measurements showed reasonable agreement.展开更多
In this paper, we simulate γ -ray energy deposition for different incident energies with four different mod-els using the tool GEANT4(Geant4.7.0, 2005)developed by CERN (the Center of European Research of Nucleus). T...In this paper, we simulate γ -ray energy deposition for different incident energies with four different mod-els using the tool GEANT4(Geant4.7.0, 2005)developed by CERN (the Center of European Research of Nucleus). The results we obtained indicate that there are different peak values for different incident energies. That is, we can differentiate the incident energy accurately if the detector can determine the peak value accurately. This is meaningful for the geometrical configuration of the detector to get the most probable distribution (MPD) of energy deposition for different incident energies. According to the simulation, we can insert certain slices with large absorption coefficient to obtain a better MPD of energy deposition which will not alter the shape of the energy deposition.展开更多
文摘Fundamental characteristics of the plastic scintillating fiber (PSF) as a detector for electromagnetic radiation (X & γ) are obtained by GEANT4 detector simulation tool package. The detector response to radiation with energy of 10~400 keV is found out. Energy deposition as well as detector efficiency (DE) of the PSF are studied. In order to make linear array of the PSF for imaging purpose, the optimum length of fiber is also estimated.
文摘The characterization of sulfonated polyetherketone (SPEK-C) films was investigated by using positronannihilation lifetime spectroscopy (PALS) and atomic force microscopy (AFM). It was found that free volume radiusand intensity depend on the variation of sulfonation degree and solvent evaporation time of the films. Pore size anddistribution determined from PALS and AFM measurements showed reasonable agreement.
文摘In this paper, we simulate γ -ray energy deposition for different incident energies with four different mod-els using the tool GEANT4(Geant4.7.0, 2005)developed by CERN (the Center of European Research of Nucleus). The results we obtained indicate that there are different peak values for different incident energies. That is, we can differentiate the incident energy accurately if the detector can determine the peak value accurately. This is meaningful for the geometrical configuration of the detector to get the most probable distribution (MPD) of energy deposition for different incident energies. According to the simulation, we can insert certain slices with large absorption coefficient to obtain a better MPD of energy deposition which will not alter the shape of the energy deposition.
