| 马立勇,孙吉宁,郑娜,等.0～15MeV中子诱发239Pu裂变产额能量关系的评价研究[J].中华放射医学与防护杂志,2010,30(2):120-123.MA Li-yong,SUN Ji-ning,ZHENG Na,et al.Evaluation of dependence of cumulative fission yields on incident-neutron energy for 239Pu (n, f)[J].Chin J Radiol Med Prot,2010,30(2):120-123 |
| 0～15MeV中子诱发239Pu裂变产额能量关系的评价研究 |
| Evaluation of dependence of cumulative fission yields on incident-neutron energy for 239Pu (n, f) |
| 投稿时间：2009-03-19 |
| DOI： |
| 中文关键词: 239Pu 气体产物核 累积产额 产额能量关系 |
| 英文关键词:239Pu Gas nuclides Cumulative yield Energy dependence of yield |
| 基金项目:国家973项目(2009GB107001,2008CB717803);高等学校博士点专项科研基金(200610001023) |
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| 中文摘要: |
| 目的 研究0～15 MeV中子诱发 239Pu 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 239Pu 裂变的 85Krm 、 87Kr 、 88Kr 和 138Xe 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 87Kr 和 88Kr 的累积产额随能量增加呈上升趋势,而 85Krm 和 138Xe 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。 |
| 英文摘要: |
| Objective To study the dependence of cumulative fission yields on incident-neutron energy for 239Pu (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 85Krm, 87Kr, 88Kr and 138Xe resulting from the 239Pu (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 87Kr and 88Kr, but the linear functions for 85Krm and 138Xe. The multi-modal model calculation may qualitatively describe the energy dependence of yields for the 239Pu (n,f) reaction. |
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