Measurement of the thermal neutron capture cross section and resonance integral of Am-241
Measurement of the thermal neutron capture cross section and resonance integral of Am-241
复制标题
Am-241热中子俘获截面和共振积分的测量
DOI：
10.1524/ract.2001.89.7.419
复制
发表时间：
2001
影响因子：
1.8
通讯作者：
M. F. Koskinas
中科院分区：
文献类型：
--
作者：
N. L. Maidana;M. S. Dias;M. F. Koskinas
在2 MW IEA-R1研究堆上进行了~（241）Am（n，γ）~（241）gAm反应的热中子截面和共振积分的测量。采用4πβ-γ符合系统，应用示踪技术测量了放射性活度。进行了有和无镉盖的辐照，并通过蒙特卡罗方法计算了通过该盖的中子透射。进行了高分辨率γ射线能谱测量，以检查结果的一致性并测量中子注量监测器箔的活度。协方差分析已被应用到所有涉及的不确定性。2200 m/s中子的热中子截面和共振积分分别为（602±9）B和（1665±91）B。这些结果进行了讨论，并与以前的测量进行比较。
Measurements of the thermal neutron cross section and resonance integral for the reaction 241Am(n,γ) 241gAm have been performed at the IEA-R1 research reactor operating at 2 MW. A 4πβ-γ coincidence system applying the tracer technique has been used for measuring the activities. Irradiations with and without cadmium cover were performed and the neutron transmission through this cover was calculated by the Monte Carlo method. High resolution γ-ray spectrometry measurements were undertaken in order to check the consistency of the results and to measure activities of the neutron fluence monitor foils. Covariance analysis has been applied to all uncertainties involved. The thermal neutron cross section for 2200 m/s neutrons and the resonance integral resulted (602±9)b and (1665±91)b, respectively. These results are discussed and compared with previous measurements.