The New Neutron Powder Diffractometer with a Multi-Detector System for High-Efficiency and High-Resolution Measurements
The New Neutron Powder Diffractometer with a Multi-Detector System for High-Efficiency and High-Resolution Measurements
复制标题
配备多探测器系统的新型中子粉末衍射仪，可实现高效、高分辨率测量
DOI：
10.1143/jjap.37.3319
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发表时间：
1998
影响因子：
1.5
通讯作者：
Y. Yamaguchi
中科院分区：
文献类型：
--
作者：
K. Ohoyama;T. Kanouchi;K. Nemoto;M. Ohashi;T. Kajitani;Y. Yamaguchi
介绍了一台用于高效率、高分辨率测量的多用途中子粉末衍射仪爱马仕，它已安装在日本原子能研究所的JRR-3 M反应堆上。为了在短计数时间内获得高质量的数据，或用少量的样品，爱马仕有一个多探测器系统，该系统由150个3 He中子探测器和简单的窗口式准直器组成。最佳分辨率为Δ2θ = 18'，Δd/d = 3 ×10-3，其中2θ和d分别为散射角和d间距。在JRR-3 M中，在现有条件下，普通粉末衍射实验的持续时间为1-5小时。本文给出了一些典型的粉末衍射实验结果和性能。我们还展示了自旋玻璃材料的单晶的磁漫散射的二维强度映射的结果。
We describe a multipurpose neutron powder diffractometer for high-efficiency and high-resolution measurements, HERMES, which has been installed at the JRR-3M reactor in Japan Atomic Energy Research Institute. To obtain high-quality data for a short counting time, or with a small sample amount, HERMES has a multi-detector system which consists of 150 3He neutron detectors and simple window type collimation. The best resolution is Δ2θ of 18' and Δd/d of 3 ×10-3, where 2θ and d are scattering-angle and d-spacing, respectively. The duration of an ordinary powder diffraction experiment is 1–5 h under the present conditions in JRR-3M. Some typical results of powder diffraction experiments and performance are given in this paper. We also show a result of 2D intensity mapping of magnetic diffuse scattering from a single crystal of a spin glass material.