Evaluation of the molar volume of silicon crystals for a determination of the Avogadro constant. - Kenichi Fujii; Atsushi Waseda; Naoki Kuramoto; Shigeki Mizushima; Mitsuru Tanaka; Staf Valkiers; Philip Taylor 001; Rüdiger Kessel; Paul De Bievre (IEEE Trans. Instrum. Meas., 2003)

Interferometric determination of the diameter of a silicon sphere using a direct optical frequency tuning system. - Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2003)

Present State of the avogadro constant determination from silicon Crystals with natural isotopic compositions. - Kenichi Fujii; Atsushi Waseda; Naoki Kuramoto; Shigeki Mizushima; Peter Becker 003; Horst Bettin; R. Arnold Nicolaus; Ulrich Kuetgens; Staf Valkiers; Philip Taylor 001; Paul De Bievre; Giovanni Mana; et al. (IEEE Trans. Instrum. Meas., 2005)

Volume determination of a silicon sphere using an improved interferometer with optical frequency tuning. - Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2005)

Density Determination of Silicon Spheres Using an Interferometer With Optical Frequency Tuning. - Naoki Kuramoto; Kenichi Fujii; Yasushi Azuma; Shigeki Mizushima; Yasutake Toyoshima (IEEE Trans. Instrum. Meas., 2007)

Improvement in the Volume Determination for Si Spheres With an Optical Interferometer. - Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2009)

Diameter Comparison of a Silicon Sphere for the International Avogadro Coordination Project. - Naoki Kuramoto; Kenichi Fujii; R. Arnold Nicolaus; Guido Bartl; Malcolm Gray; Peter Manson; Walter Giardini (IEEE Trans. Instrum. Meas., 2011)

Improvements to the Volume Measurement of 28Si Spheres to Determine the Avogadro Constant. - Naoki Kuramoto; Yasushi Azuma; Hajime Inaba; Feng-Lei Hong; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2015)

Mass Measurement of 1-kg Silicon Spheres for Determination of the Avogadro and Planck Constants. - Shigeki Mizushima; Naoki Kuramoto; Kazunaga Ueda; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2015)

Homogeneity Characterization of Lattice Spacing of Silicon Single Crystals. - Atsushi Waseda; Hiroyuki Fujimoto; Xiao-Wei Zhang; Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2015)

Surface Layer Analysis of Si Sphere by XRF and XPS. - Lulu Zhang 002; Yasushi Azuma; Akira Kurokawa; Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2015)

Surface Layer Analysis of a 28Si-Enriched Sphere Both in Vacuum and in Air by Ellipsometry. - Kazuaki Fujita; Naoki Kuramoto; Yasushi Azuma; Shigeki Mizushima; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2017)

Realization of the Kilogram Based on the Planck Constant at NMIJ. - Naoki Kuramoto; Lulu Zhang 002; Shigeki Mizushima; Kazuaki Fujita; Yasushi Azuma; Akira Kurokawa; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2017)

Mass Measurement of 28Si-Enriched Spheres at NMIJ for the Determination of the Avogadro Constant. - Shigeki Mizushima; Naoki Kuramoto; Lulu Zhang 002; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2017)

Uniformity Evaluation of Lattice Spacing of 28Si Single Crystals. - Atsushi Waseda; Hiroyuki Fujimoto; Xiao-Wei Zhang; Naoki Kuramoto; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2017)

Thickness Measurement of Oxide and Carbonaceous Layers on a 28Si Sphere by XPS. - Lulu Zhang 002; Naoki Kuramoto; Yasushi Azuma; Akira Kurokawa; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2017)

Volume Measurement of a 28Si-Enriched Sphere for a Determination of the Avogadro Constant at NMIJ. - Naoki Kuramoto; Lulu Zhang 002; Kazuaki Fujita; Sho Okubo; Hajime Inaba; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2019)

Electron Paramagnetic Resonance Study on 28Si Single Crystal for the Future Realization of the Kilogram. - Shigeki Mizushima; Naoki Kuramoto; Kenichi Fujii; Takahide Umeda (IEEE Trans. Instrum. Meas., 2019)

Verifying the Reliability of a Voltage Balance Apparatus to Measure Small Mass and Force Standards at NMIJ. - Kazuaki Fujita; Kenichi Fujii; Yasuyuki Yamamoto; Yuichi Ota; Naoki Kuramoto (IEEE Trans. Instrum. Meas., 2021)

Reproducibility of the Realization of the Kilogram Based on the Planck Constant by the XRCD Method at NMIJ. - Naoki Kuramoto; Shigeki Mizushima; Lulu Zhang 002; Kazuaki Fujita; Sho Okubo; Hajime Inaba; Yasushi Azuma; Akira Kurokawa; Yuichi Ota; Kenichi Fujii (IEEE Trans. Instrum. Meas., 2021)

Determination of Defect Concentrations in ²⁸Si Crystals Using EPR for the Realization of the Kilogram. - Shigeki Mizushima; Naoki Kuramoto; Takahide Umeda (IEEE Trans. Instrum. Meas., 2021)

Volume Measurement of a 28Si-Enriched Sphere to Realize the Kilogram Based on the Planck Constant at NMIJ. - Yuichi Ota; Sho Okubo; Hajime Inaba; Naoki Kuramoto (IEEE Trans. Instrum. Meas., 2021)

XPS Analysis of a 28Si-Enriched Sphere for Realization of the Kilogram. - Lulu Zhang 002; Naoki Kuramoto; Akira Kurokawa (IEEE Trans. Instrum. Meas., 2021)

Investigating Stability of Si Sphere Surface Layer in Ambient-Vacuum Cyclic Measurements Using Ellipsometry. - Kazuaki Fujita; Kenichi Fujii; Lulu Zhang 002; Yasushi Azuma; Shigeki Mizushima; Naoki Kuramoto (IEEE Trans. Instrum. Meas., 2022)

Finite-Element Simulation of Effect of Surface Roughness of Coaxial Cylindrical Electrodes on Small Mass and Force Measurements Using Voltage Balance Apparatus. - Kazuaki Fujita; Naoki Kuramoto (IEEE Trans. Instrum. Meas., 2022)

Effects of Shielding and Guarding Electrodes on Electrostatic-Force Balance Measurements in a Coaxial Cylindrical Capacitor. - Kazuaki Fujita; Nobu-hisa Kaneko; Atsushi Domae; Yasutaka Amagai; Takayasu Fujino; Naoki Kuramoto (IEEE Trans. Instrum. Meas., 2025)