Ladu计数器性能研究

• 作 者: 陈常茂 陈玉华
• 机 构: 中国原子能科学研究院rrrrrrrrn,中国原子能科学研究院
• 出 处: 核电子学与探测技术
• 发表日期: 1987年04期
• 关键词: Ladu 能量响应 径向微分响应 角响应 有效中心 中子束 源距 计数率 响应值 几何中心

测量了角响应、径向微分响应、能量响应及球腔内中子计数率分布,并估算了有效中心。角响应小于5%,径向微分响应与实心球探测器的情况相同。在源距大于5倍计数器半径的情况下,忽略有效中心与几何中心之差异所导入的响应值误差小于0.7％。球腔内超热与热中子计数比小于10％,计数率依赖于热中子探测器所在位置。大约在200eV至5MeV能区,能量响应是平伸的,误差小于±18％。

The angular response, radial differential response, energy response and intracavity neutron count rate distribution were measured and the effective center was estimated. The angular response is less than 5% and the radial differential response is the same as for solid ball detectors. In the case of a source distance greater than 5 times the radius of the counter, the discrepancy of the active center with the geometric center is ignored and the response error introduced is less than 0.7%. The ratio of hypersphere to thermal neutron in the sphere is less than 10%. The counting rate depends on the position of the thermal neutron detector. About 200eV to 5MeV energy region, the energy response is flat, with less than ± 18% error.