Charged-particle spectrometry using a pencil-beam DT neutron source for double-differential cross-section measurement
Charged-particle spectrometry using a pencil-beam DT neutron source for double-differential cross-section measurement
复制标题
使用笔形束 DT 中子源进行双微分截面测量的带电粒子光谱法
DOI：
10.1016/j.nima.2006.08.086
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Nishitani
中科院分区：
文献类型：
--
作者：
K. Kondo;I. Murata;K. Ochiai;H. Miyamaru;N. Kubota;S. Takagi;S. Shido;A. Takahashi;T. Nishitani
14MeV中子引起的带电粒子发射的双微分截面测量对于估计聚变反应堆的核加热和材料损伤非常重要。然而，尽管轻核核反应在聚变反应堆发展中很重要，但可用的实验数据却很少。为了准确测量微分截面，特别是轻核的微分截面，我们提出了一种精细的光谱测量系统和数据处理方法。笔形束中子源的使用克服了测量的根本困难。因此，由硅表面势垒探测器组成的反望远镜系统满足高能量分辨率和角分辨率、较宽的探测能量范围和足够的粒子辨别能力。为了校正样品中发射的带电粒子的能量损失，采用了通过展开过程的严格校正方法。这种光谱测定技术的有效性和能力通过三个基本测量得到证实：特氟龙发射的带电粒子、27Al(n, xα) 反应发射的 α 粒子的测量以及 1H(n,n) 反应反冲的质子。该技术可应用于各种材料（尤其是较轻材料）的详细 DDXc 测量，以进行聚变反应堆建模。
Measurement of double-differential cross-sections of charged-particle emission induced by 14MeV neutrons is quite important for estimating the nuclear heating and material damage of a fusion reactor. However, there are few experimental data available in spite of the importance of the nuclear reactions of light nuclei in fusion reactor development. In order to accurately measure differential cross-sections, especially of light nuclei, we propose a refined spectrometry system and a data processing method. The employment of a pencil-beam neutron source overcomes the fundamental difficulty of the measurement. As a result, a system with a counter telescope consisting of silicon surface barrier detectors satisfies high energy resolution and angular resolution, a wide detection energy range and adequate particle discrimination. To correct the energy loss of the emitted charged particles in the sample, a rigorous correction method by means of the unfolding procedure is applied. The validity and the capability of this spectrometry technique are confirmed from three basic measurements: the measurements of charged particles emitted from Teflon, α-particles emitted from the27Al(n, xα) reaction and the protons recoiling from the1H(n,n) reaction. This technique can be applied to the detailed DDXc measurements of various materials, especially of lighter materials, for fusion reactor modeling.