基于信赖域算法的中子解谱方法研究  

Investigation of Unfolding Neutron Spectrum Based on Trust Region Algorithm

作　　者：林存宝[1] 刘国福[1] 杨俊[1] 

机构地区：[1]国防科学技术大学仪器科学与技术系,湖南长沙410073

出　　处：《原子能科学技术》2012年第12期1480-1485,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(A050508/11175254)

摘　　要：提出了一种新的基于信赖域算法的中子能谱求解方法。使用O5S软件仿真了能量范围为0.25～16MeV、能量间隔为0.25MeV的BC501A液体闪烁体探测器响应函数。利用该响应函数仿真验证了入射中子能谱分别为单峰和多峰情况下算法的解谱效果,并通过D-T单能中子源、241 Am-Be和252 Cf连续中子源对解谱方法进行了实验验证。结果表明,使用信赖域算法求得的能谱与参考谱线具有较好的一致性,初步验证了解谱方法的有效性。A novel method for unfolding neutron spectrum based on trust region algorithm was presented.The response functions of the BC501A liquid scintillation detector in the energy range from 0.25 MeV to 16 MeV with an energy interval of 0.25 MeV were generated by the code O5S.Both the single and multi-peak spectra were simulated to test the capability of the new method with the calculated response functions.Meanwhile,D-T monoenergetic neutron source,241Am-Be continuous neutron source and 252Cf continuous neutron source were also measured to verify the performance of this approach.The results are in good agreement with that of the reference spectra and the effectiveness of the above proposed method is demonstrated.

关 键 词：中子解谱 信赖域算法 O5S 

分 类 号：TL812.2[核科学技术—核技术及应用]