CAJ | 학술논문

目的研究0～15 MeV中子诱发~(239)Pu裂变产物的累积产额随入射中子能量变化的关系.方法使用加权平均和ZOTT评估的方法对裂变产物核的累积产额实验数据进行评价推荐,通过SPCC程序拟合和多模式模型理论首次得出产额能量关系.结果评价推荐了0～15 MeV中子诱发~(239)Pu裂变的~(85)Kr~m、~(87)Kr、~(88)Kr和~(138)Xe 4个重要气体产物核的累积产额数据,给出了产额能量关系曲线.评价后的数据与国际上ENDF/B-VII、JENDL-3.1、JEF-2.2和CENDL-2等数据库的推荐数据进行了比较,使相关数据得以更新和补充.理论计算结果可以在定性上与实验拟合曲线进行比较.结论 ~(87)Kr和~(88)Kr的累积产额随能量增加呈上升趋势,而~(85)Kr~m和~(138)xe呈现直线型的关系曲线.多模式理论计算结果可以定性地反映实验拟合曲线的趋势.
목적 연구0～15 MeV중자유발~(239)Pu렬변산물적루적산액수입사중자능량변화적관계.방법 사용가권평균화ZOTT평고적방법대렬변산물핵적루적산액실험수거진행평개추천,통과SPCC정서의합화다모식모형이론수차득출산액능량관계.결과 평개추천료0～15 MeV중자유발~(239)Pu렬변적~(85)Kr~m、~(87)Kr、~(88)Kr화~(138)Xe 4개중요기체산물핵적루적산액수거,급출료산액능량관계곡선.평개후적수거여국제상ENDF/B-VII、JENDL-3.1、JEF-2.2화CENDL-2등수거고적추천수거진행료비교,사상관수거득이경신화보충.이론계산결과가이재정성상여실험의합곡선진행비교.결론 ~(87)Kr화~(88)Kr적루적산액수능량증가정상승추세,이~(85)Kr~m화~(138)xe정현직선형적관계곡선.다모식이론계산결과가이정성지반영실험의합곡선적추세.
Objective To study the dependence of cumulative fission yields on incident-neutron energy for~(239)Pu(n,f).Methods The experimental yield data were evaluated by using codes AVERAGE for weighted average and ZOTT for simultaneous evaluation.The multi-modal model was used to calculate the energy dependence of yields.Results The experimental yield data were evaluated at different neutron energies for gas fission products ~(85)Kr~m,~(87) Kr,~(88)Kr and~(138)Xe resulting from the~(239)Pu(n,f) reaction.The energy dependence of the cumulative fission product yields on the incident neutron was presented and recommended.The evaluated curves of product yield versus neutron energy were compared with the results calculated by the TALYS code.Conclusions The energy curves of yield showed the rising trend for~(87)Kr and ~(88)Kr.but the linear functions for~(85)Kr~m and~(138)Xe.The multi.modal model calculation may qualitatively describe the energy dependence of yields for the~(239)Pu(n,f) reaction.