Neutron induced fission ofPu240,242from 1 eV to 200 MeV
Neutron induced fission ofPu240,242from 1 eV to 200 MeV
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Pu240,242 的中子诱导裂变从 1 eV 到 200 MeV
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
C. Mcgrath
中科院分区：
文献类型：
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作者：
F. Tovesson;T. Hill;M. Mocko;J. Baker;C. Mcgrath
测量了{sup 240，242}Pu的中子感生裂变截面随入射中子能量的变化。这是减少核数据实验不确定性的努力的一部分，以支持下一代核反应堆和嬗变技术。这两种钚同位素是不裂变的，现有的数据仅限于反应阈值以下。目前的数据表明，在{sup 242}钚裂变截面中存在2.67 eV的共振，这是ENDF/B-VII评估中缺少的，并解决了keV区域的差异。测量的横截面进行了比较与核反应代码GNASH的统计模型计算。
The neutron induced fission cross sections of {sup 240,242}Pu have been measured as a function of incident neutron energy from 1 eV to 200 MeV. This is part of an effort to reduce experimental uncertainties of nuclear data in support of next generation nuclear reactors and transmutation technology. These two plutonium isotopes are nonfissile, and the available data are limited below reaction threshold. The present data demonstrate the presence of a 2.67 eV resonance in the {sup 242}Pu fission cross section, which is missing in the ENDF/B-VII evaluation, and resolve discrepancies in the keV region. The measured cross sections are also compared with statistical model calculations made with the nuclear reaction code GNASH.