neutron energy

Measurement of neutron energy spectrum at thermal column of heavy water reactor

重水反应堆热柱中子能谱测量

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Based on the neutron energy, the value of weighting factor was given.

根据中子能量给出了相应的辐射权重因子的数值.

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The neutron energy spectrum at the thermal column of the heavy water reactor of China Institute of Atomic Energy has been measured by using a mechanical chopper by time-of-flight method. The result shows that the energy spectrum deviates from Maxwell distribution.

利用飞行时间法，用机械选择器测量了中国原子能科学研究院重水反应堆热柱的中子能谱.结果表明，该热柱能谱和理论Maxwel谱有偏离。

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Neutron capture cross sections of W and Gd were measured relative to that of Au at six neutron energy values by using a large liquid scintillator tank and time-of-flight technique. The accelerator used was a 2.5 MV pulsed van de Graff.

本工作是在2.5MV脉冲化质子静电加速器上，使用大液体闪烁探测器和飞行时间法，相对于金的俘获截面测量了钨和钆六个能量点的中子俘获截面。

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A mathematic-physical equation that describes the natural neutron radiation field is theoretically established, in which the natural neutron flux is considered for the fast neutron group ( E-n> 0.1MeV) and slow-thermal neutron group according to neutron energy.

将天然中子按能量分为快中子组（En>0.1MeV）与慢热中子组，建立了地-空界面上天然快中子流与慢热中子流粒子注量率随空间分布的数理方程。

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The result shows that the neutron energy spectrum is quite different from a typical Maxwell distribution. This is because that there is a silicon filter of 50 cm long inside the hole of the thermal column.

由于热柱孔道内有一个50cm长的硅过滤器，所以中子能谱偏离典型的麦克斯韦分布。

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