使用高精度角度编码器进行绝对X射线能量测量。

Absolute X-ray energy measurement using a high-accuracy angle encoder.

作者信息

Masuda Takahiko, Watanabe Tsukasa, Beeks Kjeld, Fujimoto Hiroyuki, Hiraki Takahiro, Kaino Hiroyuki, Kitao Shinji, Miyamoto Yuki, Okai Koichi, Sasao Noboru, Seto Makoto, Schumm Thorsten, Shigekawa Yudai, Tamasaku Kenji, Uetake Satoshi, Yamaguchi Atsushi, Yoda Yoshitaka, Yoshimi Akihiro, Yoshimura Koji

机构信息

Research Institute for Interdisciplinary Science, Okayama University, Okayama, Japan.

National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.

出版信息

J Synchrotron Radiat. 2021 Jan 1;28(Pt 1):111-119. doi: 10.1107/S1600577520014526.

DOI:10.1107/S1600577520014526

PMID:33399559

Abstract

This paper presents an absolute X-ray photon energy measurement method that uses a Bond diffractometer. The proposed system enables the prompt and rapid in situ measurement of photon energies over a wide energy range. The diffractometer uses a reference silicon single-crystal plate and a highly accurate angle encoder called SelfA. The performance of the system is evaluated by repeatedly measuring the energy of the first excited state of the potassium-40 nuclide. The excitation energy is determined as 29829.39 (6) eV, and this is one order of magnitude more accurate than the previous measurement. The estimated uncertainty of the photon energy measurement was 0.7 p.p.m. as a standard deviation and the maximum observed deviation was 2 p.p.m.

摘要

本文介绍了一种使用邦德衍射仪的绝对X射线光子能量测量方法。所提出的系统能够在宽能量范围内快速原位测量光子能量。该衍射仪使用一块参考硅单晶板和一个名为SelfA的高精度角度编码器。通过反复测量钾-40核素第一激发态的能量来评估该系统的性能。确定激发能为29829.39 (6) eV，这比之前的测量精度提高了一个数量级。光子能量测量的估计不确定度为标准偏差0.7 ppm，观察到的最大偏差为2 ppm。