搜索结果: 1-6 共查到“理学 235U n, f”相关记录6条 . 查询时间(0.045 秒)
核数据协方差是评估核装置设计不确定度和核数据调整的重要输入，直接影响设计不确定度量化评估和核数据调整的结果。为测试基于不确定度源项分析和线性最小二乘法评价的235U平滑区协方差数据的合理性，采用OECD/NEA WPEC/SG33提出的核数据调整基准例题和自主研发的核数据调整程序NDAC，开展了以JENDL-4.0库为基础的核数据调整测试，得到了应用了235U cov版235U数据的调整结果。测试...
Multi-modal analysis for low energy neutron-induced fission of 235U
235U (n, f) multi-model prompt neutron fragment property
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2009/12/24
Low energy neutron induced fission of 235U is studied in the framework of the multi-modal fission model. The fission fragment properties, such as the yields, the average total kinetic energy distribut...
Systematics on fission fragment mass distribution of neutron induced 235U fission
235U fission fission fragment mass distribution systematics 5 Gaussian model
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2009/8/14
Based on the neutron induced fission fragment mass distribution data up to
neutron energy 20MeV measured with the double kinetic energy method (KEM) and the radio active method (RAM), the systematics...
235U(n,f)裂变的三通道理论研究
多通道模型 无规颈断裂模型 235U(n,f)
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2009/7/6
将裂变的多通道模型和无规颈断裂模型相结合,系统地计算了0≤En≤6.0MeV中子诱发235U裂变的碎片质量分布和平均总动能分布.通过最小二乘法与实验数据拟合,得到了235U(n,f)裂变的三个通道道概率随中子能量变化的规律.理论计算结果与实验数据符合得较好.
基体分离/MC-ICP-MS测定树皮表层235U/238U同位素比率
树皮 铀 同位素比率 多接收器电感耦合等离子体质谱仪
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2009/5/6
分别从日本广岛和京都采集了香樟树(Cinnamomum camphora)树皮样品共12份，用X射线能谱仪研究了树皮表层基体元素组成，并用扫描电镜观察了树皮表层微观形貌。将树皮表层样品进行干灰化法处理后，采用DOWEX® 1-X8型阴离子交换树脂分离基体元素，然后用多接收器电感耦合等离子体质谱仪(MC-ICP-MS)测定了树皮表层235U/238U同位素比率。研究结果表明： 树皮表层主要基...
Surface Charge Density Determination of Micaceous Minerals by 235U Fission Particle Track Method
Micaceous Minerals 235U Fission surface charge density mica
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2012/2/13
The surface charge density of mica (001) cleavages was determined by counting the number of fission particle tracks in a given area of a 6-mm muscovite disc replica with optical and scanning electron ...