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1Development of a spherical tissue equivalent proportional counter for neutron monitoring显示文摘A spherical tissue equivalent proportional counter(TEPC) for neutron monitoring has been developed. It was properly designed to produce a uniform electric field intensity around the anode wire. An internal ^(241)Am alpha source was adopted for lineal energy calibration. The TEPC was characterized in terms of dose equivalent response in a standard ^(252)Cf neutron field, and was tested with 2.45 MeV neutrons. Microdosimetric spectra, frequency mean lineal energy and dose-average mean lineal energy of 2.45 MeV neutrons were obtained and compared with FLUKA Monte Carlo simulation results. The measurement and simulation results agreed well. The mean quality factor and dose equivalent values evaluated from the 2.45 MeV neutron measurement were in good agreement with the recommended effective quality factor and ambient dose equivalent H*(10),respectively. Preliminary results have proved the availability of the developed TEPC for neutron monitoring.姜志刚 袁永刚 王和义 陈华 2015Nuclear Science and Techniques2015,26,6:0
2Optimization study on neutron spectrum unfolding based on the least-squares method显示文摘The response functions and pulse height spectrum(PHS) of a 2''×2'' BC501A detector were obtained through a general-purpose Monte Carlo simulation toolkit,Geant4.A relatively simple but effective method was adopted to unfold the PHS.Recommendations regarding the response matrix were proposed to optimize the unfolding results.The results indicate that the accuracy of the unfolding can be greatly improved using many incident neutrons with a wide energy range,a proper energy interval,and an appropriate channel width of the response matrix.The above-mentioned method was verified by unfolding three different types of simulated spectrum,the results of which are in good accord with the simulated distribution.Hong-Hu Song Yong-Gang Yuan Tai-Ping Peng Yang Yang Yong-Gang Mo Jing Wu 2018Nuclear Science and Techniques2018,29,8:0
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