The new neutron powder diffractometer with a multi-detector system for high-efficiency and high-resolution measurements

Kenji Ohoyama, Tomonori Kanouchi, Keiji Nemoto, Masayoshi Ohashi, Tsuyoshi Kajitani, Yasuo Yamaguchi

Research output: Contribution to journalArticlepeer-review

287 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3319-3326
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume37
Issue number6 A
DOIs
Publication statusPublished - 1998 Jun
Externally publishedYes

Keywords

  • Crystal structure
  • Diffuse scattering
  • Magnetic structure
  • Neutron powder diffraction
  • Rietveld profile fitting

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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