论文标题
$^{235} $ u（n，f）相对于h（n，n）h的$^{235} $ u（n，f）$^{235} $ u（n，f）的后坐力质子望远镜和平行板雪崩计数
Recoil Proton Telescopes and Parallel Plate Avalanche Counters for the $^{235}$U(n,f) cross section measurement relative to H(n,n)H between 10 and 450 MeV neutron energy
论文作者
论文摘要
为了测量$^{235} $ u（n，f）在CERN的N \ _TOF设施的横截面上，在广泛的中子能量范围内，实现了一个由两个裂变探测器和三个用于中子通量确定的检测系统组成的检测系统。中子通量检测器是基于闪烁体和固态检测器的后坐力质子望远镜（RPT），它构想从中子 - 蛋白质弹性散射反应中检测后方质子。该系统与裂变室和一系列平行板雪崩柜台进行裂变事件检测，在2018年在CERN的N \ _TOF设施进行了测量。 本文介绍了两个RPT的性能（尤其是用于此测量）以及平行板雪崩计数器的概述。特别是，据报道，通过蒙特卡洛模拟和对中子束的响应，背景，死亡时间校正和样品表征的响应的检测效率表征。本研究的结果表明，这些检测器的性能适用于在10到450 meV范围内的裂变反应截面的准确测量。
With the aim of measuring the $^{235}$U(n,f) cross section at the n\_TOF facility at CERN over a wide neutron energy range, a detection system consisting of two fission detectors and three detectors for neutron flux determination was realized. The neutron flux detectors are Recoil Proton Telescopes (RPT), based on scintillators and solid state detectors, conceived to detect recoil protons from the neutron-proton elastic scattering reaction. This system, along with a fission chamber and an array of parallel plate avalanche counters for fission event detection, was installed for the measurement at the n\_TOF facility in 2018, at CERN. An overview of the performances of two RPTs - especially developed for this measurement - and of the parallel plate avalanche counters are described in this article. In particular, the characterization in terms of detection efficiency by Monte Carlo simulations and response to neutron beam, the study of the background, dead time correction and characterization of the samples, are reported. The results of the present investigation show that the performances of these detectors are suitable for accurate measurements of fission reaction cross sections in the range from 10 to 450~MeV.
