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arXiv · 2010.00953

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

Takahiko Masuda·Tsukasa Watanabe·Kjeld Beeks·Hiroyuki Fujimoto·Takahiro Hiraki·Hiroyuki Kaino·Shinji Kitao·Yuki Miyamoto·Koichi Okai·Noboru Sasao·Makoto Seto·Thorsten Schumm·Yudai Shigekawa·Kenji Tamasaku·Satoshi Uetake·Atsushi Yamaguchi·Yoshitaka Yoda·Akihiro Yoshimi·Koji Yoshimura
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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 in a wide energy range. The diffractometer uses a reference silicon single crystal plate and a highly accurate angle encoder called SelfA. We evaluate the performance of the system 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. It is one order of magnitude more precise than the previous measurement. The estimated uncertainty of the photon energy measurement was 0.7 ppm as a standard deviation and the maximum observed deviation was 2 ppm.

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Takahiko Masuda, Tsukasa Watanabe, Kjeld Beeks, Hiroyuki Fujimoto, Takahiro Hiraki, Hiroyuki Kaino, Shinji Kitao, Yuki Miyamoto, Koichi Okai, Noboru Sasao, Makoto Seto, Thorsten Schumm, Yudai Shigekawa, Kenji Tamasaku, Satoshi Uetake, Atsushi Yamaguchi, Yoshitaka Yoda, Akihiro Yoshimi, Koji Yoshimura. 2020-10-02. Absolute X-ray energy measurement using a high-accuracy angle encoder. https://doi.org/10.1107/s1600577520014526

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