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RIKEN Nishina Center for Accelerator-Based Science Nuclear Structure Research Group

Director: Hideki Ueno (D.Sc.)

Research Summary

Hideki Ueno

Far-unstable RIs (radioactive isotopes), whose proton/neutron ratios differ significantly from those of naturally-occurring stable nuclei, have been shown to exhibit unique nuclear structures and properties, and their structural studies are one of the central subjects in nuclear physics. The research group has been conducting physics research based on various nuclear spectroscopic techniques, such as β-ray spectroscopy (β-NMR, μSR, etc.), γ-ray spectroscopy (γ-TDPAD, Mössbauer spectroscopy, etc), laser spectroscopy, and TOF mass spectroscopy. In particular, the group is working on the development of the device to control RI spins and the universal low-energy RI-beam device, SLOWRI, aiming at new experimental research using the unique RI beams produced.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Particle/Nuclear/Cosmic ray/Astro physics
  • Quantum Beam Science

Keywords

  • Nuclear Physics
  • Radioactive-Isotope Beam
  • Nuclear Spin Orientation
  • Ion Trapping
  • Muon Science

Selected Publications

  • 1. Go, S., Tsuzuki, Y., Yoneda, H., Ichikawa, Y., Ikeda, T., Imai, N., Imamura, K., Niikura, M., Nishimura, D., Mizuno, R., Takeda, S., Ueno, H., Watanabe, S., Y. Saito, T., Shimoura, S., Sugawara, S., Takamine, A., Takahashi, T.:
    "Demonstration of nuclear gamma-ray polarimetry based on a multi-layer CdTe Compton camera"
    Sci. Rep. 14, 2573 (2024).
  • 2. Xian, W., Chen, S., Nikas, S., Rosenbusch, M., Wada, M., Ishiyama, H., Hou, D., Iimura, S., Nishimura, S., Schury, P., Takamine, A., Yan, S., Browne, F., Doornenbal, P., Flavigny, F., Hirayama, Y., Ito, Y., Kimura, S., M. Kojima, T., Lee, J., Liu, J., Michimasa, H., Y. Moon, J., Naimi, S., Niwase, T., Sonoda, T., Suzuki, D., Watanabe, X. Y., Werner, V., Wimmer, K., and Wollnik, H.:
    "Mass measurements of neutron-rich A ≈ 90 nuclei constrain element abundances"
    Phys. Rev. C 109, 035804 (2024).
  • 3. Ishibashi, Y., Gladkov, A., Ichikawa, Y., Takamine, A., Nishibata, H., Sato, T., Yamazaki, H., Abe, T., M. Daugas, J., Egami, T., Fujita, T., Georgiev, G., Imamura, K., Kawaguchi, T., Kobayashi, W., Nakamura, Y., Ozawa, A., Sanjo, M., Shimizu, N., Tominaga, D., Tao, L. C., Asahi, K., Ueno, H.:
    "Nuclear magnetic moment of the neutron-rich nucleus 21O"
    Phys. Rev. C 107, 024306 (2023).
  • 4. Iimura, S., Rosenbusch, M., Takamine, A., Tsunoda, Y., Wada, M., Chen, S., Hou, D., Xian, W., Ishiyama, H., Yan, S., Schury, P., Crawford, H., Doornenbal, P., Hirayama, Y., Ito, Y., Kimura, S., Koiwai, T., Kojima, T., Koura, H., Lee, J., Liu, J., Michimasa, S., Miyatake, H., Moon, J., Naimi, S., Nishimura, S., Niwase, T., Odahara, A., Otsuka, T., Paschalis, S., Petri, M., Shimizu, N., Sonoda, T., Suzuki, D., Watanabe, Y., Wimmer, K., Wollnik, H.:
    "Study of the N = 32 and N = 34 shell gap for Ti and V by the first high-precision multireflection time-of-flight mass measurements at BigRIPS-SLOWRI"
    Phys. Rev. Lett. 130, 012501 (2023).
  • 5. Otsuka, T., Abe, T., Yoshida, T., Tsunoda, Y., Shimizu, N., Itagaki, N., Utsuno, Y., Vary, J., Maris, P., Ueno, H.:
    "α-Clustering in atomic nuclei from first principles with statistical learning and the Hoyle state character"
    Nat. Commum. 13, 2234 (2022).
  • 6. Ramadhan, M. R., Adiperdana, B., Ramli, I., Sari, D. P., Putri, A. E., Wydiaiswari, U., Rozak, H., Zaharim, W. N., Manaf, A., Kurniawan, B., Mohamed-Ibrahim, M. I., Sulaiman, S., Kawamata, T., Adachi, T., Koike, Y., Watanabe, I.:
    "Estimation of the on-site Coulomb potential and covalent state in La2CuO4 by muon spin rotation and density functional theory calculations"
    Phys. Rev. Research 4, 033044 (2022).
  • 7. Sari, D. P., Asih, R., Hiraki, K., Nakano, T., Nozue, Y., Ishii, Y., Hillier, A. D., Watanabe, I.:
    "Distorted superconducting nodal line on a single Fermi surface in the anisotropic organic superconductor λ-(BETS)2GaCl4"
    Phys. Rev. B 104, 224506 (2021).
  • 8. Tsunoda, N., Otsuka, T., Takayanagi, K., Shimizu, N., Suzuki, T. Utsuno, Y. Yoshida, S., Ueno, H.:
    "The impact of nuclear shape on the emergence of the neutron dripline"
    Nature 587, 66 (2020).
  • 9. Boulay, F., Simpson, G. S., Ichikawa, Y., Kisyov, S., Bucurescu, D., Takamine, A., Ahn, D. S., Asahi, K., Baba, H., Balabanski, D. L., Egami, T., Fujita, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Hass, M., Imamura, K., Inabe, N., Ishibashi, Y., Kawaguchi, T., Kawamura, T., Kim, W., Kobayashi, Y., Kojima, S., Kusoglu, A., Lozeva, R., Momiyama, S., Mukul, I., Niikura, M., Nishibata, H., Nishizaka, T., Odahara, A., Ohtomo, Y., Ralet, D., Sato, T., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Tao, L. C., Togano, Y., Tominaga, D., Ueno, H., Yamazaki, H., Yang, X. F., Daugas, J. M.:
    "g-Factor of the 99Zr (7/2+) isomer: monopole evolution in shape coexisting region"
    Phys. Rev. Lett. 124, 112501 (2020).
  • 10. Ichikawa, Y., Nishibata, H., Tsunoda, Y., Takamine, A., Imamura, K., Fujita, T., Sato, T., Momiyama, S., Shimizu, Y., Ahn, D. S., Asahi, K., Baba, H., Balabanski, D. L., Boulay, Daugas, J.-M., Egami, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Inabe, N., Ishibashi, Y., Kawaguchi, T., Kawamura, T., Kobayashi, Y., Kojima, S., Kusoglu, Mukul, A. I., Niikura, M., Nishizaka, T., Odahara, A., Ohtomo, Y., Otsuka, T., Ralet, D., Simpson, G. S., Sumikama, T., Suzuki, H., Takeda, H., Tao, L. C., Togano, Y., Tominaga, D., Ueno, H., Yamazaki, H., Yang, X. F.:
    "Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu"
    Nat. Phys. 15, 321 (2019).

Recent Research Results

Related Links

Lab Members

Principal investigator

Hideki Ueno
Director

Core members

Isao Watanabe
Senior Research Scientist
Shintaro Go
Research Scientist
Marco Rosenbusch
Research Scientist
Yutaka Tsuzuki
Special Postdoctoral Researcher
Yukari Matsuo
Senior Visiting Scientist
Takaharu Otsuka
Senior Visiting Scientist
Yota Komiyama
Junior Research Associate
Yusuke Fukuzawa
RIKEN Student Researcher M
Muhammad Abdan Syakuur
International Program Associate
Phanthip Jaikaew
International Program Associate
Ken Fui Chin
International Program Associate

Contact Information

315 Nishina RIBF Bldg.,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: ueno@riken.jp

Organization

SLOWRI Team
Hironobu Ishiyama (D.Sc.)

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