Publications

Program A01-5 Quantum electrodynamics of highly charged heavy ions studied with state-of-the-art cosmic X-ray detectors
Principal Investigator NAKAMURA, Nobuyuki (The University of Electro-Communications)

Refereed scientific articles

  1. FY2022
  2. FY2021

FY2022

  • N. Nakamura, N. Nalamura, N. Numadate,. S. Oishi, X. Tong, X. Gao, H. Odaka, T. Takahashi, Y. Tsuzuki, Y. Uchida, H. Watanabe, S. Watanabe, H. Yoneda, and N. Nakamura, “Strong polarization of a J = 1/2 to 1/2 transition arising from unexpectedly large quantum interference,” Phys. Rev. Lett. 130, 113001 (2023). DOI: 10.1103/PhysRevLett.130.113001 .
  • N. Kimura, Piriti, S. Kuma, T. Azuma, and N. Nakamura, “Electric-quadrupole transition-rate measurement of a highly charged ion in an electron-beam ion trap using pulsed laser excitation from a metastable state,” Phys. Rev. A 107, 022805 (2023). DOI: 0.1103/PhysRevA.107.022805 .
  • N. Kimura, Priti, Y. Kono, P. Pipatpakorn, K. Soutome, N. Numadate, S. Kuma, T. Azuma, and N. Nakamura, “Hyperfine-structure-resolved laser spectroscopy of many-electron highly charged ions,” Commun. Phys. 6, 8 (2023).
  • H. A. Sakaue, D. Kato, N. Yamamoto, I. Murakami, H. Hara, and N. Nakamura, “Energy dependence of the line ratio I(233.9 Å)/I(243.8 Å) in Fe xv observed with an electron beam ion trap,” Astrophys. J. 943, 14 (2023).

FY2021

  • Y. Tsuzuki, S. Watanabe, S. Oishi, N. Nakamura, N. Numadate, H. Odaka, Y. Uchida, H. Yoneda, and T. Takahashi, “An application of a Si/CdTe Compton camera for the polarization measurement of hard x rays from highly charged heavy ions,” Rev. Sci. Instrum. 92, 063101 (2021). DOI: 10.1063/5.0050826 .
  • N. Numadate, S. Oishi, H. Odaka, Priti, M. Sakurai, T. Takahashi, Y. Tsuzuki, Y. Uchida, H. Watanabe, S. Watanabe, H. Yoneda, and N. Nakamura, “Polarization measurement of L-shell radiative recombination x rays from highly charged bismuth ions,” Phys. Rev. A 105, 023109 (2022). DOI: 10.1103/PhysRevA.105.023109 .
  • Z. Hu, G. Xiong, Z. He, Z. Yang, N. Numadate, C. Huang, J. Yang, K. Yao, B. Wei, Y. Zou, C. Wu, Y. Ma, Y. Wu, X. Gao, and N. Nakamura, “Giant retardation effect in electron-electron interaction,” Phys. Rev. A 105, L030801 (2022). DOI: 10.1103/PhysRevA.105.L030801 .

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Non-refereed scientific articles

  1. 2022年
  2. 2021年

FY2022

  • N/A

FY2021

  • N/A

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Presentations (international)

  1. FY2022
  2. FY2021

FY2022

  • N. Nakamura (invited), “Atomic physics of highly charged heavy ions studied at the Tokyo electron beam ion trap,” 15th Asia Pacific Physics Conference (APPC15), Hybrid (Gyeongju, South Korea), August 21–26, 2022.
  • Z. Hu (invited), X. Gao, K. Yao, C. Wu, N. Numadate, Y. Ma, Y. Wu, B. Wei, Y. Zou, and N. Nakamura, “Relativistic effects on radiative properties and electronic collisions of highly charged heavy ions,” 20th International Conference on the Physics of Highly Charged Ions (HCI 2022), Matsue, Japan, August 29–September 3, 2022.
  • N. Nakamura (invited), “Polarization measurements for recombination X-rays,” Workshop on Physics with Trapped Charged Particle (WPTCP 2022), New Delhi, India, October 27–28, 2022.
  • N. Nakamura (invited), “Plasma atomic processes studied with two complementary electron beam ion traps in Tokyo,” The 31st International Toki Conference on Plasma and Fusion Research (ITC31), Online, November 8–11, 2022.

FY2021

  • N. Nakamura, “Polarization of recombination X-rays studied with a state-of-the-art polarimeter installed at the Tokyo-EBIT,” 18th SPARC Topical Workshop, Online, September 6–9, 2021.

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Presentations (domestic)

  1. 2022年
  2. 2021年

FY2022

  • 中村信行, 「二電子性再結合 X 線の偏光度測定: J = 1/2-1/2 遷移に大きな偏光度を生じたメカニズムについて」, 核融合科学研究所素過程研究会, 岐阜県土岐市 (核融合科学研究所), 2022 年 12 月 22 日.

FY2021

  • N. Nakamura, “Spectroscopic studies of heavy ions relevant to astrophysics,” RIKEN r-EMU workshop 2021, Online, October 18–19, 2021.
  • 中村信行, 大石晋平, 沼館直樹, 内田悠介, 小高裕和, Xiang Gao, 加藤太治, 高橋忠幸, 都築豊, Xiaomin Tong, 米田浩基, 渡辺伸, 渡邉裕文, 「二電子性再結合X線の偏光度測定 III」, 日本物理学会第 77 回年次大会, オンライン開催, 2022 年 3 月 15–19 日.

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Others

  1. 2022年
  2. 2021年

FY2022

  • プレスリリース: 「X 線偏光で捉えた特異な量子干渉効果」, 電気通信大学, 東京大学 Kavli IPMU, 筑波大学, 自然科学研究機構核融合科学研究所共同プレスリリース, 2023 年 3 月 17 日.

FY2021

  • N/A

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