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首页> 外文期刊>Journal of Radioanalytical and Nuclear Chemistry: An International Journal Dealing with All Aspects and Applications of Nuclear Chemistry >Measurements of neutron total cross-sections and resonance parameters of niobium using pulsed neutrons generated by an electron linac
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Measurements of neutron total cross-sections and resonance parameters of niobium using pulsed neutrons generated by an electron linac

机译：用电子直线加速器产生的脉冲中子测量铌的中子总截面和共振参数

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摘要

We measured neutron total cross-sections of natural niobium in the neutron energy region from 0.05 to 300 eV by using the time-of-flight method at the Pohang Neutron Facility, which consists of an electron linear accelerator, a water-cooled tantalum target with a water moderator, and a 12-m long time-of-flight path. A ~6Li-ZnS(Ag) scintillator with a diameter of 12.5 cm and a thickness of 1.6 cm was used as a neutron detector, and a high purity natural niobium metallic disc with a diameter of 8.0 cm and a thickness of 15.0 mm thickness was used for the neutron transmission measurement. Notch filters composed of Co, In, Cd were used to estimate the background level and to calculate the length of neutron flight path. In order to reduce the gamma-ray background from bremsstrahlung and from neutron capture, we used a neutron-gamma separation system based on their different pulse shapes. The present measurement was compared with the existing experimental and the evaluated data. The resonance parameters of ~(93)Nb isotope were obtained from the transmission by using the SAMMY code and were compared with other previous results.
机译：我们在浦项中子工厂使用飞行时间方法测量了中子能量区域从0.05到300 eV的天然铌的中子总截面，该方法由电子线性加速器，水冷钽靶和一个水减速器和一条12米长的飞行时间路径。使用直径为12.5 cm，厚度为1.6 cm的〜6Li-ZnS（Ag）闪烁体作为中子探测器，并使用直径为8.0 cm，厚度为15.0 mm的高纯度天然铌金属圆盘作为中子探测器。用于中子传输测量。由Co，In，Cd组成的陷波滤波器用于估计背景水平并计算中子飞行路径的长度。为了减少致辐射和中子俘获所产生的伽马射线背景，我们根据它们的不同脉冲形状使用了中子-伽马分离系统。将当前的测量结果与现有的实验数据和评估数据进行比较。 〜（93）Nb同位素的共振参数是使用SAMMY代码从传输中获得的，并与其他先前的结果进行了比较。

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