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RIKEN Nishina Center for Accelerator-Based Science Nuclear Spectroscopy Laboratory

Director: Hideki Ueno (D.Sci.)

Research Summary

Hideki  Ueno(D.Sci.)

It has been revealed that far-unstable RIs (radioactive isotopes), which have an extremely high or low proton/neutron ratio as compared with naturally occurring stable nuclei, show various unique properties.
The understanding of the nuclear-structure changes and their mechanism by which such properties appear is one of the most important subjects in nuclear physics. The research group has conducted physics studies utilizing RI beams mainly at the RIBF facility. These studies are based on the technique of nuclear spectroscopy such as β-ray-detected NMR, γ-PAD (Perturbed Angular Distribution), laser, and Mössbauer among other methods. In particular, based on our own techniques and devices for the production of spin-controlled RI beams, anomalous nuclear structures and properties of far unstable nuclei are investigated through the determination of intrinsic nuclear properties such as nuclear spins, electromagnetic moments.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering

Keywords

  • Experimental Nuclear Physics
  • Accelerator-Use Experiment
  • Radioactive-Isotope Beam
  • Radiation Measurement
  • Nuclear Spin Orientation

Selected Publications

  • 1. 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).
  • 2. 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, F., Daugas, J. M., Egami, T., Fukuda, N., Funayama, C., Furukawa, T., Georgiev, G., Gladkov, A., Inabe, N., Ishibashi, Y., Kobayashi, Y., Kojima, S., Kusoglu, A., Kawaguchi, T., Kawamura, T., Mukul, 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., Tomonaga, D., Ueno, H., Yamazaki, H., Yang, X. F.:
    "Measurement of the magnetic moment of 75Cu reveals the interplay between nuclear shell evolution and shape deformation"
    Nat. Phys. 15, pp. 321–325 (2019).
  • 3. Ahn, D. S., Fukuda, N., Geissel, H., Inabe, N., Iwasa, N., Kubo, T., Kusaka, K., Morrissey, D. J., Murai, D., Nakamura, T., Ohtake, M., Otsu, H., Sato, H., Sherrill, B. M., Shimizu, Y., Suzuki, H., Takeda, H., Tarasov, O. B., Ueno, H., Yanagisawa, Y., Yoshida, K.:
    "Location of the neutron dripline at fluorine and neon"
    Phys. Rev. Lett. 123, 212501 (2019).
  • 4. Tarasov, O. B., Ahn, D. S., Bazin, D., Fukuda, N., Gade, A., Hausmann, M., Inabe, N., Ishikawa, S., Iwasa, N., Kawata, K., Komatsubara, T., Kubo, T., Kusaka, K., Morrissey, D. J., Ohtake, M., Otsu, H., Portillo, M., Sakakibara, T., Sakurai, H., Sato, H., Sherrill, B. M., Shimizu, Y., Stolz, A., Sumikama, T., Suzuki, H., Takeda, H., Thoennessen, M., Ueno, H., Yanagisawa Y., Yoshida, K.:
    "Discovery of 60Ca and implifications for the stability of 70Ca"
    Phys. Rev. Lett. 121, 022501 (2018).
  • 5. Ito, Y., Schury, P., Wada, M., Arai, F., Haba, H., Hirayama, Y., Ishizawa, S., Kaji, D., Kimura, S., Koura, H., MacCormick, M., Miyatake, H., Moon, J. Y., Morimoto, K., Morita, K., Mukai, M., Murray, I., Niwase, T., Okada, K., Ozawa, A., Rosenbusch, M., Takamine, A., Tanaka, T., Watanabe, Y. X., Wollnik, H., Yamaki, S.:
    "First mass measurements of nuclides around Z = 100 with a multireflection time-of-flight mass spectrograph"
    Phys. Rev. Lett. 120, 152501 (2018).
  • 6. Xu, Z. Y., Heylen, H., Asahi, K., Boulay, F., Daugas, J. M., Groote, R. P. de, Gins, W., Kamalou, O., Koszorús, Á., Lykiardopoulou, M., Mertzimekis, T. J., Neyens, G., Nishibata, H., Otsuka, T., Orset, R., Poves, A., Sato, T., Stodel, C., Thomas, J .C., Tsunoda, N., Utsuno, Y., Vandebrouck, M., Yang, X. F.:
    "Nuclear moments of the low-lying isomeric 1 + state of 34Al: Investigation on the neutron 1p1h excitation across N = 20 in the island of inversion"
    Phys. Lett. B 782, pp. 619–626 (2018).
  • 7. Heylen, H., Rydt, M. De, Neyens, G., Bissell, M. L., Caceres, L., Chevrier, R., Daugas, J. M., Ichikawa, Y., Ishibashi, Y., Kamalou, O., Mertzimekis, T. J., Morel, P., Papuga, J., Poves, A., Rajabali, M. M., St¨odel, C., Thomas, J. C., Ueno, H., Utsuno, Y., Yoshida, N., Yoshimi, and A.:
    "High-precision quadrupole moment reveals significant intruder component in 33Al ground state"
    Phys. Rev. C 94, 034312 (2016).
  • 8. Kusoglu, A., Georgiev, G., Sotty, C., Balabanski, D. L., Goasduff, A., Ishii, Y., Abe, Y., Asahi, K., Bostan, M., Chevrier, R., Chikamori, M., Daugas, J. M., Furukawa, T., Nishibata, H., Ichikawa, Y., Ishibashi, Y., Lozeva, R., Miyatake, H., Nagae, D., Nanao, T., Niikura, M., Niwa, T., Okada, S., Ozawa, A., Saito, Y., Shirai, H., Ueno, H., Yordanov, D. T., Yoshida, N.:
    "Magnetic moment of the 13/2 + isomeric state in 69Cu: Spin alignment in the one-nucleon removal reaction"
    Phys. Rev. C 93, 054313 (2016).
  • 9. Ueno, H., Miyatake, H., Yamamoto, Y., Tanimoto, S., Shimoda, T., Aoi, N., Asahi, K., Ideguchi, E., Ishihara, M., Izumi, H., Kishida, T., Kubo, T., Mitsuoka, S., Mizoi, Y., Notani, M., Ogawa, H., Ozawa, A., Sasaki, M., Shirakura, T., Takahashi, N., Yoneda, and K.:
    "Beta-delayed neutron and gamma-ray spectroscopy of 17C utilizing spin-polarized 17B"
    Phys. Rev. C 87, 034316 (2013).
  • 10. Ichikawa, Y., Ueno, H., Ishii, Y., Furukawa, T., Yoshimi, A., Kameda, D., Watanabe, H., Aoi, N., Asahi, K., Balabanski, D. L., Chevrier, R., Daugas, J. M., Fukuda, N., Georgiev, G., Hayashi, H., Iijima, H., Inabe, N., Inoue, T., Ishihara, M., Kubo, T., Nanao, T., Ohnishi, T., Suzuki, K., Tsuchiya, M., Takeda, H., Rajabali, M. M.:
    "Production of spin-controlled rare isotope beams"
    Nat. Phys. 8, pp. 918−922 (2012).

Related Links

Lab Members

Principal investigator

Hideki Ueno
Director

Core members

Hiroki Yamazaki
Senior Research Scientist
Aiko Takamine
Research Scientist
Tetsu Sonoda
Research & Development Scientist
Takashi Abe
Contract Researcher
Minori Tajima
Postdoctoral Researcher
Momo Mukai
Special Postdoctoral Researcher
Aleksey Gladkov
Research Associate
Yukari Matsuo
Senior Visiting Scientist
Takaharu Otsuka
Senior Visiting Scientist
Yoshio Kobayashi
Visiting Scientist

Contact Information

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

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