PULSE HEIGHT TALLY RESPONSE EXPANSION METHOD FOR APPLICATION IN DETECTOR PROBLEMS

作     者：TRAVIS ZIPPERER FARZAD RAHNEMA DINGKANG ZHANG 

作者机构：Nuclear and Radiological Engineering Program Georgia Institute of Technology 770 State Street Atlanta Georgia 30332-0745 USA 

出 版 物：《International Journal of Modern Physics: Conference Series》 

年 卷 期：2014年第ijmpcs卷第27期

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Detector modeling pulse height tally hybrid response method 

摘      要：A new i ncident fl ux r e sponse e x pansion method (IFLEX) is developed to perform on-the-fly detector pulse height spectra calculations with Monte Carlo accuracy. Given the flux incident on the detector window, the method uses pre-computed continuous energy Monte Carlo based response functions to generate the pulse height tallies. B-spline functions are selected for the expansion of the incident flux in the energy phase space. Response functions are generated for a CsI(Na) crystal using an energy dependent B-spline form of the IFLEX method. The method is verified for two incident flux spectra on the crystal. Results of the energy dependent B-spline form of the method are compared to the solutions generated using the direct Monte Carlo code MCNP5. The method is shown to be several orders faster than MCNP5 while maintaining paralleled accuracy.