Skip to main content
Log in

Nuclear physics with RI Beam Factory

  • Review Article
  • Published:
Frontiers of Physics Aims and scope Submit manuscript

Abstract

Research activities of nuclear physics at Radioactive Isotope Beam Factory over 10 years are reviewed and future directions are also discussed. Conceptual ideas in designing the facility as well as experimental devices are introduced. Special emphasis is given to highlighted results obtained at RIBF.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Y. Yano, The RIKEN RI Beam Factory Project: A status report, Nucl. Instrum. Methods Phys. Res. Sect. B 261(1–2), 1009 (2007)

    ADS  Google Scholar 

  2. T. Kubo, M. Ishihara, N. Inabe, H. Kumagai, I. Tanihata, et al., The RIKEN radioactive beam facility, Nucl. Instrum. Methods Phys. Res. Sect. B 70(1–4), 309 (1992)

    ADS  Google Scholar 

  3. K. Morita, K. Morimoto, D. Kaji, T. Akiyama, S. Goto, et al., Experiment on the synthesis of element 113 in the reaction 209Bi(70Zn,n)278113, JPSJ 73(10), 2593 (2004)

    ADS  Google Scholar 

  4. K. Morita, K. Morimoto, D. Kaji, T. Akiyama, S. Goto, et al., Observation of second decay chain from 278113, JPSJ 76(4), 045001 (2007)

    ADS  Google Scholar 

  5. K. Morita, K. Morimoto, D. Kaji, H. Haba, K. Ozeki, et al., New result in the production and decay of an isotope, 278113, of the 113th element, JPSJ 81(10), 103201 (2012)

    ADS  Google Scholar 

  6. H. Okuno, N. Fukunishi, and O. Kamigaito, Progress of RIBF accelerators, Prog. Theor. Exp. Phys. 2012, 03C002 (2012)

    Google Scholar 

  7. T. Kubo, D. Kameda, H. Suzuki, N. Fukuda, H. Takeda, et al., BigRIPS separator and ZeroDegree spectrometer at RIKEN RI Beam Factory, Prog. Theor. Exp. Phys. 2012, 03C003 (2012)

    Google Scholar 

  8. T. Ohnishi, T. Kubo, K. Kusaka, A. Yoshida, K. Yoshida, et al., Identification of new isotopes 125Pd and 126Pd produced by in-flight fission of 345 MeV/nucleon 238U: First results from the RIKEN RI Beam Factory, J. Phys. Soc. Jpn. 77(8), 083201 (2008)

    ADS  Google Scholar 

  9. T. Motobayashi and H. Sakurai, Research with fast radioactive isotope beams at RIKEN, Prog. Theor. Exp. Phys. 2012, 03C001 (2012)

    Google Scholar 

  10. S. Kubono, Y. Yanagisawa, T. Teranishi, et al., New low-energy RIB separator CRIB for nuclear astrophysics, Eur. Phys. J. A 13, 217 (2002)

    ADS  Google Scholar 

  11. Y. Hirayama, Y. Watanabe, N. Imai, et al., Off-line test of the KISS gas cell, Nucl. Instrum. Methods Phys. Res. Sect. B 317, 480 (2013)

    ADS  Google Scholar 

  12. T. Nakamura, H. Sakurai, and H. Watanabe, Exotic nuclei explored at in-flight separators, Prog. Part. Nucl. Phys. 97, 53 (2017)

    ADS  Google Scholar 

  13. T. Kobayashi, N. Chiga, T. Isobe, Y. Kondo, T. Kubo, et al., SAMURAI spectrometer for RI beam experiments, Nucl. Instrum. Methods Phys. Res. Sect. B 317, 294 (2013)

    ADS  Google Scholar 

  14. T. Uesaka, et al. (SHARAQ Collaboration), The SHARAQ spectrometer, Prog. Theor. Exp. Phys. 2012, 03C007 (2012)

    Google Scholar 

  15. A. Ozawa, T. Uesaka, and M. Wakasugi, The rare-RI ring, Prog. Theor. Exp. Phys. 2012, 03C009 (2012)

    Google Scholar 

  16. M. Wakasugi, T. Emoto, S. Ito, S. Wang, T. Suda, Y. Yano, K. Kurita, K. Ishii, T. Tamae, A. Kuwajima, A. Noda, T. Shiari, and H. Tongu, Electron scattering based on a novel internal target technique: SCRIT, Eur. Phys. J. A 42(3), 453 (2009)

    ADS  Google Scholar 

  17. T. Suda, et al., Nuclear physics at the SCRIT electron scattering facility, Prog. Theor. Exp. Phys. 2012, 03C008 (2012)

    Google Scholar 

  18. M. Wada, Genealogy of gas cells for low-energy RI-beam production, Nucl. Instrum. Methods Phys. Res. Sect. B 317, 450 (2013)

    ADS  Google Scholar 

  19. K. Sekiguchi, H. Okamura, N. Sakamoto, H. Suzuki, M. Dozono, et al., Three nucleon force effects in intermediate-energy deuteron analyzing powers for dp elastic scattering, Phys. Rev. C 83(6), 061001 (2011)

    ADS  Google Scholar 

  20. K. Sekiguchi, Y. Wada, J. Miyazaki, H. Witała, M. Dozono, et al., Complete set of deuteron analyzing powers for dp elastic scattering at 250–294 MeV/nucleon and the three-nucleon force, Phys. Rev. C 89(6), 064007 (2014)

    ADS  Google Scholar 

  21. K. Sekiguchi, H. Witala, T. Akieda, D. Eto, H. Kon, et al., Complete set of deuteron analyzing powers from dp elastic scattering at 190 MeV/nucleon, Phys. Rev. C 96(6), 064001 (2017)

    ADS  Google Scholar 

  22. T. Ohnishi, T. Kubo, K. Kusaka, A. Yoshida, K. Yoshida, et al., Identification of 45 new neutron-rich isotopes produced by in-flight fission of a 238U Beam at 345 MeV/nucleon, J. Phys. Soc. Jpn. 79(7), 073201 (2010)

    ADS  Google Scholar 

  23. N. Fukuda, T. Kubo, D. Kameda, N. Inabe, H. Suzuki, et al., Identification of new neutron-rich isotopes in the rare-earth region produced by 345 MeV/nucleon 238U, J. Phys. Soc. Jpn. 87(1), 014202 (2018)

    ADS  Google Scholar 

  24. H. Suzuki, T. Kubo, N. Fukuda, N. Inabe, D. Kameda, et al., Discovery of new isotopes 81,82Mo and 85,86Ru and a determination of the particle instability of 103Sb, Phys. Rev. C 96(3), 034604 (2017)

    ADS  Google Scholar 

  25. O. B. Tarasov, D. S. Ahn, D. Bazin, N. Fukuda, A. Gade, et al., Discovery of 60Ca and implications for the stability of 70Ca, Phys. Rev. Lett. 121(2), 022501 (2018)

    ADS  Google Scholar 

  26. D. Kameda, T. Kubo, T. Ohnishi, K. Kusaka, A. Yoshida, et al., Observation of new microsecond isomers among fission products from in-flight fission of 345 MeV/nucleon 238U, Phys. Rev. C 86(5), 054319 (2012)

    ADS  Google Scholar 

  27. M. Takechi, T. Ohtsubo, M. Fukuda, D. Nishimura, T. Kuboki, et al., Interaction cross sections for Ne isotopes towards the island of inversion and halo structures of 29Ne and 31Ne, Phys. Lett. B 707(3–4), 357 (2012)

    ADS  Google Scholar 

  28. M. Takechi, S. Suzuki, D. Nishimura, M. Fukuda, T. Ohtsubo, et al., Evidence of halo structure in 37Mg observed via reaction cross sections and intruder orbitals beyond the island of inversion, Phys. Rev. C 90(6), 061305 (2014) (R)

    ADS  Google Scholar 

  29. Y. Ichikawa, H. Ueno, Y. Ishii, T. Furukawa, A. Yoshimi, et al., Production of spin-controlled rare isotope beams, Nat. Phys. 8(12), 918 (2012)

    Google Scholar 

  30. T. Nishi, K. Itahashi, G. P. A. Berg, H. Fujioka, N. Fukuda, et al., Spectroscopy of pionic atoms in 122Sn(d, 3He) reaction and angular dependence of the formation cross sections, Phys. Rev. Lett. 120(15), 152505 (2018)

    ADS  Google Scholar 

  31. P. Doornenbal, In-beam gamma-ray spectroscopy at the RIBF, Prog. Theor. Exp. Phys. 2012, 03C004 (2012)

    Google Scholar 

  32. S. Takeuchi, T. Motobayashi, Y. Togano, et al., DALI2: A NaI(Tl) detector array for measurements of γ rays from fast nuclei, Nucl. Instrum. Methods Phys. Res. Sect. A 763, 596 (2014)

    ADS  Google Scholar 

  33. P. Doornenbal, H. Scheit, N. Aoi, S. Takeuchi, K. Li, et al., Spectroscopy of Ne 32 and the “Island of Inversion”, Phys. Rev. Lett. 103(3), 032501 (2009)

    ADS  Google Scholar 

  34. T. Nakamura, N. Kobayashi, Y. Kondo, Y. Satou, N. Aoi, et al., Halo Structure of the Island of Inversion Nucleus Ne 31, Phys. Rev. Lett. 103(26), 262501 (2009)

    ADS  Google Scholar 

  35. P. Doornenbal, H. Scheit, N. Kobayashi, N. Aoi, S. Takeuchi, et al., Exploring the “island of inversion” by in-beam γ-ray spectroscopy of the neutron-rich sodium isotopes 31,32,33Na, Phys. Rev. C 81(4), 041305 (2010)

    ADS  Google Scholar 

  36. K. A. Li, Y. L. Ye, H. Scheit, P. Doornenbal, T. Satoshi, A. Nori, M. Masafumi, T. Eri, M. Tohru, S. Hiroyoshi, and D.Y. Pang, Inelastic scattering of 32Mg at 190 MeV/nucleon from a thick proton target, Chin. Phys. Lett. 29(10), 102301 (2012)

    ADS  Google Scholar 

  37. S. Takeuchi, M. Matsushita, N. Aoi, P. Doornenbal, K. Li, et al., Well developed deformation in 42Si, Phys. Rev. Lett. 109(18), 182501 (2012)

    ADS  Google Scholar 

  38. N. Kobayashi, T. Nakamura, J. A. Tostevin, Y. Kondo, N. Aoi, et al., One-and two-neutron removal reactions from the most neutron-rich carbon isotopes, Phys. Rev. C 86(5), 054604 (2012)

    ADS  Google Scholar 

  39. D. Steppenbeck, S. Takeuchi, N. Aoi, P. Doornenbal, M. Matsushita, et al., Evidence for a new nuclear “magic number” from the level structure of 54Ca, Nature 502(7470), 207 (2013)

    ADS  Google Scholar 

  40. L. Audirac, A. Obertelli, P. Doornenbal, D. Mancusi, S. Takeuchi, et al., Evaporation-cost dependence in heavyion fragmentation, Phys. Rev. C 88(4), 041602 (2013)

    ADS  Google Scholar 

  41. P. Doornenbal, H. Scheit, S. Takeuchi, N. Aoi, K. Li, et al., In-beam γ-ray spectroscopy of 34,36,38Mg: Merging the N = 20 and N = 28 shell quenching, Phys. Rev. Lett. 111(21), 212502 (2013)

    ADS  Google Scholar 

  42. H. Wang, N. Aoi, S. Takeuchi, M. Matsushita, P. Doornenbal, et al., Collectivity evolution in the neutron-rich Pd isotopes toward the N = 82 shell closure, Phys. Rev. C 88(5), 054318 (2013)

    ADS  Google Scholar 

  43. H. Wang, N. Aoi, S. Takeuchi, et al., Structure of 136Sn and the Z = 50 magicity, Prog. Theor. Exp. Phys. 2014, 023D02 (2014)

    Google Scholar 

  44. T. Nakamura, N. Kobayashi, Y. Kondo, Y. Satou, J. A. Tostevin, et al., Deformation-Driven p-Wave Halos at the Drip Line: Ne 31, Phys. Rev. Lett. 112(14), 142501 (2014)

    ADS  Google Scholar 

  45. H. L. Crawford, P. Fallon, A. O. Macchiavelli, R. M. Clark, B. A. Brown, et al., Shell and shape evolution at N = 28: The 40Mg ground state, Phys. Rev. C 89(4), 041303 (2014)

    ADS  Google Scholar 

  46. P. Doornenbal, H. Scheit, S. Takeuchi, et al., Rotational level structure of sodium isotopes inside the “island of inversion”, Prog. Theor. Exp. Phys. 2014, 053D01 (2014)

    Google Scholar 

  47. N. Kobayashi, T. Nakamura, Y. Kondo, J. A. Tostevin, Y. Utsuno, et al., Observation of a p-wave one-neutron halo configuration in 37Mg, Phys. Rev. Lett. 112(24), 242501 (2014)

    ADS  Google Scholar 

  48. P. Doornenbal, S. Takeuchi, N. Aoi, M. Matsushita, A. Obertelli, et al., Intermediate-energy Coulomb excitation of 104Sn: Moderate E2 strength decrease approaching 100Sn, Phys. Rev. C 90(6), 061302 (2014)

    ADS  Google Scholar 

  49. A. Corsi, S. Boissinot, A. Obertelli, P. Doornenbal, M. Dupuis, et al., Neutron-driven collectivity in light tin isotopes: Proton inelastic scattering from 104Sn, Phys. Lett. B 743, 451 (2015)

    ADS  Google Scholar 

  50. D. Steppenbeck, S. Takeuchi, N. Aoi, P. Doornenbal, M. Matsushita, et al., Low-lying structure of 50Ar and the N = 32 subshell closure, Phys. Rev. Lett. 114(25), 252501 (2015)

    ADS  Google Scholar 

  51. K. Li, Y. Ye, T. Motobayashi, H. Scheit, P. Doornenbal, S. Takeuchi, N. Aoi, M. Matsushita, E. Takeshita, D. Pang, and H. Sakurai, Relativistic Coulomb excitation in 32Mg near 200 MeV/nucleon with a thick target, Phys. Rev. C 92(1), 014608 (2015)

    ADS  Google Scholar 

  52. N. Kobayashi, T. Nakamura, Y. Kondo, J. A. Tostevin, N. Aoi, et al., One-neutron removal from 29Ne: Defining the lower limits of the island of inversion, Phys. Rev. C 93(1), 014613 (2016)

    ADS  Google Scholar 

  53. Y. Shiga, K. Yoneda, D. Steppenbeck, N. Aoi, P. Doornenbal, et al., Investigating nuclear shell structure in the vicinity of 78Ni: Low-lying excited states in the neutronrich isotopes 80,82Zn, Phys. Rev. C 93(2), 024320 (2016)

    ADS  Google Scholar 

  54. P. Doornenbal, H. Scheit, S. Takeuchi, N. Aoi, K. Li, et al., Mapping the deformation in the “island of inversion”: Inelastic scattering of 30Ne and 36Mg at intermediate energies, Phys. Rev. C 93(4), 044306 (2016)

    ADS  Google Scholar 

  55. H. Wang, N. Aoi, S. Takeuchi, M. Matsushita, T. Motobayashi, et al., First spectroscopic information from even-even nuclei in the region “southeast” of 132Sn: Neutron-excitation dominance of the 21+ state in 132Cd, Phys. Rev. C 94(5), 051301 (2016)

    ADS  Google Scholar 

  56. H. N. Liu, J. Lee, P. Doornenbal, H. Scheit, S. Takeuchi, et al., Intruder configurations in the ground state of 30Ne, Phys. Lett. B 767, 58 (2017)

    ADS  Google Scholar 

  57. N. Nakatsuka, H. Baba, T. Aumann, R. Avigo, S. R. Banerjee, et al., Observation of isoscalar and isovector dipole excitations in neutron-rich 20O, Phys. Lett. B 768, 387 (2017)

    ADS  Google Scholar 

  58. V. Vaquero, A. Jungclaus, P. Doornenbal, K. Wimmer, A. Gargano, et al., Gamma decay of unbound neutronhole states in 133Sn, Phys. Rev. Lett. 118(20), 202502 (2017)

    ADS  Google Scholar 

  59. P. Doornenbal, H. Scheit, S. Takeuchi, Y. Utsuno, N. Aoi, et al., Low-Z shore of the “island of inversion” and the reduced neutron magicity toward 28O, Phys. Rev. C 95(4), 041301 (2017)

    ADS  Google Scholar 

  60. S. Momiyama, P. Doornenbal, H. Scheit, S. Takeuchi, M. Niikura, et al., In-beam γ-ray spectroscopy of 35Mg via knockout reactions at intermediate energies, Phys. Rev. C 96(3), 034328 (2017)

    ADS  Google Scholar 

  61. A. Corsi, A. Obertelli, P. Doornenbal, F. Nowacki, H. Sagawa, et al., Spectroscopy of nuclei around 100Sn populated via two-neutron knockout reactions, Phys. Rev. C 97(4), 044321 (2018)

    ADS  Google Scholar 

  62. Zs. Vajta, D. Sohler, Y. Shiga, K. Yoneda, K. Sieja, et al., Proton single particle energies next to 78Ni: Spectroscopy of 77Cu via single proton knock-out reaction, Phys. Lett. B 782, 99 (2018)

    ADS  Google Scholar 

  63. H. Wang, N. Aoi, S. Takeuchi, M. Matsushita, P. Doornenbal, T. Motobayashi, D. Steppenbeck, K. Yoneda, K. Kobayashi, J. Lee, H.N. Liu, Y. Kondo, R. Yokoyama, H. Sakurai, and Y.L. Ye, Observation of new isotope 131Ag via the two-step fragmentation technique, Chin. Phys. Lett. 30(4), 042501 (2013)

    ADS  Google Scholar 

  64. A. Obertelli, A. Delbart, S. Anvar, L. Audirac, G. Authelet, et al., MINOS: A vertex tracker coupled to a thick liquid-hydrogen target for in-beam spectroscopy of exotic nuclei, Eur. Phys. J. A 50(1), 8 (2014)

    Google Scholar 

  65. C. Santamaria, C. Louchart, A. Obertelli, V. Werner, P. Doornenbal, et al., Extension of the N = 40 island of inversion towards N = 50: Spectroscopy of 66Cr, 70;72Fe, Phys. Rev. Lett. 115(19), 192501 (2015)

    Google Scholar 

  66. N. Paul, A. Corsi, A. Obertelli, P. Doornenbal, G. Authelet, et al., Are there signatures of harmonic oscillator shells far from stability? First spectroscopy of 110Zr, Phys. Rev. Lett. 118(3), 032501 (2017)

    ADS  Google Scholar 

  67. F. Flavigny, P. Doornenbal, A. Obertelli, J. P. Delaroche, M. Girod, et al., Shape evolution in neutronrich krypton isotopes beyond N = 60: First spectroscopy of 98,100Kr, Phys. Rev. Lett. 118(24), 242501 (2017)

    ADS  Google Scholar 

  68. S. Chen, P. Doornenbal, A. Obertelli, T. R. Rodríguez, G. Authelet, et al., Low-lying structure and shape evolution in neutron-rich Se isotopes, Phys. Rev. C 95(4), 041302 (2017)

    ADS  Google Scholar 

  69. M. Lettmann, V. Werner, N. Pietralla, P. Doornenbal, A. Obertelli, et al., Triaxiality of neutron-rich 84,86,88Ge from low-energy nuclear spectra, Phys. Rev. C 96(1), 011301 (2017)

    ADS  Google Scholar 

  70. C. M. Shand, Zs. Podolyak, M. Gorska, P. Doornenbal, A. Obertelli, et al., Shell evolution beyond Z = 28 and N = 50: Spectroscopy of 81,82,83,84Zn, Phys. Lett. B 773, 492 (2017)

    ADS  Google Scholar 

  71. L. Olivier, S. Franchoo, M. Niikura, Z. Vajta, D. Sohler, et al., Persistence of the Z = 28 shell gap around 78Ni: First spectroscopy of 79Cu, Phys. Rev. Lett. 119(19), 192501 (2017)

    ADS  Google Scholar 

  72. M. L. Cortés, P. Doornenbal, M. Dupuis, S. M. Lenzi, F. Nowacki, et al., Inelastic scattering of neutron-rich Ni and Zn isotopes off a proton target, Phys. Rev. C 97(4), 044315 (2018)

    ADS  Google Scholar 

  73. E. Pollacco, D. Beaumel, P. Roussel-Chomaz, E. Atkin, P. Baron, et al., MUST2: A new generation array for direct reaction studies, Eur. Phys. J. A 25(S1), 287 (2005)

    Google Scholar 

  74. V. Lapoux, S. Boissinot, H. Otsu, H. Baba, R. J. Chen, et al., Spectroscopy of the unbound states of the dripline nucleus 24O, Prog. Theor. Phys. Suppl. 196, 111 (2012)

    ADS  Google Scholar 

  75. S. Nishimura, et al., Beta-gamma spectroscopy at RIBF, Prog. Theor. Exp. Phys. 2012, 03C006 (2012)

    Google Scholar 

  76. S. Nishimura, Z. Li, H. Watanabe, K. Yoshinaga, T. Sumikama, et al., β-decay half-lives of very neutronrich Kr to Tc isotopes on the boundary of the r-process path: An indication of fast r-matter flow, Phys. Rev. Lett. 106(5), 052502 (2011)

    ADS  Google Scholar 

  77. H. Watanabe, T. Sumikama, S. Nishimura, K. Yoshinaga, Z. Li, et al., Low-lying level structure of the neutron-rich nucleus 109Nb: A possible oblate-shape isomer, Phys. Lett. B 696(3), 186 (2011)

    ADS  Google Scholar 

  78. T. Sumikama, K. Yoshinaga, H. Watanabe, S. Nishimura, Y. Miyashita, et al., Structural evolution in the neutron-rich nuclei 106Zr and 108Zr, Phys. Rev. Lett. 106(20), 202501 (2011)

    ADS  Google Scholar 

  79. H. Watanabe, K. Yamaguchi, A. Odahara, T. Sumikama, S. Nishimura, et al., Development of axial asymmetry in the neutron-rich nucleus 110Mo, Phys. Lett. B 704(4), 270 (2011)

    ADS  Google Scholar 

  80. P.A. Soderstrom, S. Nishimura, P. Doornenbal, G. Lorusso, T. Sumikama, et al., Installation and commissioning of EURICA–Euroball-RIKEN cluster array, Nucl. Instrum. Methods Phys. Res. Sect. B 317, 649 (2013)

    ADS  Google Scholar 

  81. P. A. Söderström, G. Lorusso, H. Watanabe, S. Nishimura, P. Doornenbal, et al., Shape evolution in 116,118Ru: Triaxiality and transition between the O(6) and U(5) dynamical symmetries, Phys. Rev. C 88(2), 024301 (2013)

    ADS  Google Scholar 

  82. H. Watanabe, G. Lorusso, S. Nishimura, Z. Y. Xu, T. Sumikama, et al., Isomers in 128Pd and 126Pd: Evidence for a robust shell closure at the neutron magic number 82 in exotic palladium isotopes, Phys. Rev. Lett. 111(15), 152501 (2013)

    ADS  Google Scholar 

  83. J. Taprogge, A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, et al., 1p 3/2 proton-hole state in 132Sn and the shell structure along N = 82, Phys. Rev. Lett. 112(13), 132501 (2014)

    ADS  Google Scholar 

  84. Z. Y. Xu, S. Nishimura, G. Lorusso, F. Browne, P. Doornenbal, et al., β-decay half-lives of 76,77Co, 79,80Ni, and 81Cu: Experimental indication of a doubly magic 78Ni, Phys. Rev. Lett. 113(3), 032505 (2014)

    ADS  Google Scholar 

  85. H. Watanabe, G. Lorusso, S. Nishimura, T. Otsuka, K. Ogawa, et al., Monopole-driven shell evolution below the doubly magic nucleus 132Sn explored with the longlived isomer in 126Pd, Phys. Rev. Lett. 113(4), 042502 (2014)

    ADS  Google Scholar 

  86. G. S. Simpson, G. Gey, A. Jungclaus, J. Taprogge, S. Nishimura, et al., Yrast 6+ seniority isomers of 136,138Sn, Phys. Rev. Lett. 113(13), 132502 (2014)

    ADS  Google Scholar 

  87. J. Taprogge, A. Jungclaus, H. Grawe, S. Nishimura, Z. Y. Xu, et al., Identification of a millisecond isomeric state in 129Cd81 via the detection of internal conversion and Compton electrons, Phys. Lett. B 738, 223 (2014)

    ADS  Google Scholar 

  88. Z. Patel, P.A. Söderström, Z. Podolyák, P. H. Regan, P. M. Walker, et al., Isomer decay spectroscopy of 164Sm and 166Gd: Midshell collectivity around N = 100, Phys. Rev. Lett. 113(26), 262502 (2014)

    ADS  Google Scholar 

  89. G. Lorusso, S. Nishimura, Z. Y. Xu, A. Jungclaus, Y. Shimizu, et al., β-decay half-lives of 110 neutron-rich nuclei across the N = 82 shell gap: Implications for the mechanism and universality of the astrophysical r process, Phys. Rev. Lett. 114(19), 192501 (2015)

    ADS  Google Scholar 

  90. J. Taprogge, A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, et al., β decay of 129Cd and excited states in 129In, Phys. Rev. C 91(5), 054324 (2015)

    ADS  Google Scholar 

  91. R. Lozeva, A. Odahara, C. B. Moon, et al, New decay scheme of the 136 51 Sb85 6- isomer, Phys. Rev. C 92, 024304 (2015)

    ADS  Google Scholar 

  92. F. Browne, A. M. Bruce, T. Sumikama, I. Nishizuka, S. Nishimura, et al., Lifetime measurements of the first 2+ states in 104,106Zr: Evolution of ground-state deformations, Phys. Lett. B 750, 448 (2015)

    ADS  Google Scholar 

  93. G. Benzoni, A. I. Morales, H. Watanabe, S. Nishimura, L. Coraggio, et al., Decay properties of 68,69,70Mn: Probing collectivity up to N = 44 in Fe isotopic chain, Phys. Lett. B 751, 107 (2015)

    ADS  Google Scholar 

  94. P. Lee, C. B. Moon, C. S. Lee, A. Odahara, R. Lozeva, et al., β-delayed γ-ray spectroscopy of non-yrast states in 138Te near the neutron drip line, Phys. Rev. C 92(4), 044320 (2015)

    ADS  Google Scholar 

  95. P. A. Söderström, S. Nishimura, Z. Y. Xu, K. Sieja, V. Werner, et al., Two-hole structure outside 78Ni: Existence of a m s isomer of 76Co and b decay into 76Ni, Phys. Rev. C 92(5), 051305 (2015) (R)

    ADS  Google Scholar 

  96. Z. Patel, Z. Podolyák, P. M. Walker, P. H. Regan, P. A. Söderström, et al., Decay spectroscopy of 160Sm: The lightest four-quasiparticle K isomer, Phys. Lett. B 753, 182 (2016)

    ADS  Google Scholar 

  97. R. Lozeva, H. Naidja, F. Nowacki, J. Dudek, A. Odahara, et al., New isomer found in 140 51 Sb89: Sphericity and shell evolution between N = 82 and N = 90, Phys. Rev. C 93(1), 014316 (2016)

    ADS  Google Scholar 

  98. A. I. Morales, G. Benzoni, H. Watanabe, S. Nishimura, F. Browne, et al., Low-lying excitations in 72Ni, Phys. Rev. C 93(3), 034328 (2016)

    ADS  Google Scholar 

  99. A. Jungclaus, A. Gargano, H. Grawe, J. Taprogge, S. Nishimura, et al., First observation of γ-ray emitted from excited states south-east of 132Sn: The πg -1 9/2νf 7/2 multiplet of 132In83, Phys. Rev. C 93(4), 041301 (2016) (R)

    ADS  Google Scholar 

  100. I. Čeliković, M. Lewitowicz, R. Gernhauser, R. Krücken, S. Nishimura, et al., New isotopes and proton emitters–crossing the drip line in the vicinity of 100Sn, Phys. Rev. Lett. 116(16), 162501 (2016)

    ADS  Google Scholar 

  101. B. Blank, T. Goigoux, P. Ascher, M. Gerbaux, J. Giovinazzo, et al., New neutron-deficient isotopes from 78Kr fragmentation, Phys. Rev. C 93(6), 061301 (2016) (R)

    ADS  Google Scholar 

  102. H. Watanabe, G. X. Zhang, K. Yoshida, P. M. Walker, J. J. Liu, et al., Long-lived K isomer and enhanced γ vibration in the neutron-rich nucleus 172Dy: Collectivity beyond double midshell, Phys. Lett. B 760, 641 (2016)

    ADS  Google Scholar 

  103. A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, G. Lorusso, et al., β decay of semi-magic 130Cd: Revision and extension of the level scheme of 130In, Phys. Rev. C 94(2), 024303 (2016)

    ADS  Google Scholar 

  104. T. Goigoux, P. Ascher, B. Blank, M. Gerbaux, J. Giovinazzo, et al., Two-proton radioactivity of 67Kr, Phys. Rev. Lett. 117(16), 162501 (2016)

    ADS  Google Scholar 

  105. P. A. Söderström, P. M. Walker, J. Wu, H. L. Liu, P. H. Regan, et al., K-mixing in the doubly mid-shell nuclide 170Dy and the role of vibrational degeneracy, Phys. Lett. B 762, 404 (2016)

    ADS  Google Scholar 

  106. J. Taprogge, A. Jungclaus, H. Grawe, I. N. Borzov, S. Nishimura, et al., Proton-hole and core-excited states in the semi-magic nucleus 131In82, Eur. Phys. J. A 52(11), 347 (2016)

    ADS  Google Scholar 

  107. E. Ideguchi, G. S. Simpson, R. Yokoyama, M. Tanaka, S. Nishimura, et al., ms isomers of 158,160Nd, Phys. Rev. C 94(6), 064322 (2016)

    ADS  Google Scholar 

  108. A. I. Morales, G. Benzoni, H. Watanabe, Y. Tsunoda, T. Otsuka, et al., Type II shell evolution in A = 70 isobars from the N ≥ 40 island of inversion, Phys. Lett. B 765, 328 (2017)

    ADS  Google Scholar 

  109. J. Wu, S. Nishimura, G. Lorusso, P. Möller, E. Ideguchi, et al., 94 β-decay half-lives of neutron-rich 55Cs to 67Ho: Experimental feedback and evaluation of the r-process rare-earth peak formation, Phys. Rev. Lett. 118(7), 072701 (2017)

    ADS  Google Scholar 

  110. P. J. Davies, H. Grawe, K. Moschner, A. Blazhev, R. Wadsworth, et al., The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd, Phys. Lett. B 767, 474 (2017)

    ADS  Google Scholar 

  111. B. Moon, C. B. Moon, P. A. Soderstrom, A. Odahara, R. Lozeva, et al., Nuclear structure and β-decay schemes for Te nuclides beyond N = 82, Phys. Rev. C 95(4), 044322 (2017)

    ADS  Google Scholar 

  112. T. Sumikama, S. Nishimura, H. Baba, F. Browne, P. Doornenbal, et al., Observation of new neutron-rich Mn, Fe, Co, Ni, and Cu isotopes in the vicinity of 78Ni, Phys. Rev. C 95(5), 051601 (2017) (R)

    ADS  Google Scholar 

  113. E. Sahin, F. L. Bello Garrote, Y. Tsunoda, T. Otsuka, G. de Angelis, et al., Shell evolution towards 78Ni: Lowlying states in 77Cu, Phys. Rev. Lett. 118(24), 242502 (2017)

    ADS  Google Scholar 

  114. A. I. Morales, A. Algora, B. Rubio, K. Kaneko, S. Nishimura, et al., Simultaneous investigation of the T = 1 (J π = 0+) and T = 0 (J π = 9+) β decays in 70Br, Phys. Rev. C 95(6), 064327 (2017)

    ADS  Google Scholar 

  115. A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, G. Lorusso, et al., Observation of a γ-decaying millisecond isomeric state in 128Cd80, Phys. Lett. B 772, 483 (2017)

    ADS  Google Scholar 

  116. B. Moon, C. B. Moon, A. Odahara, R. Lozeva, P.A. Söderström, et al., b-decay scheme of 140Te to 140I: Suppression of Gamow–Teller transitions between the neutron h 9/2 and proton h 11/2 partner orbitals, Phys. Rev. C 96(1), 014325 (2017)

    ADS  Google Scholar 

  117. F. Browne, A. M. Bruce, T. Sumikama, I. Nishizuka, S. Nishimura, et al., K selection in the decay of the (ν5/2 [32] ⊗ 3/2 [411]) 4- isomeric state in 102Zr, Phys. Rev. C 96(2), 024309 (2017)

    ADS  Google Scholar 

  118. Z. Patel, P. M. Walker, Zs. Podolyak, P. H. Regan, T. A. Berry, et al., Isomer-delayed γ-ray spectroscopy of A = 159–164 midshell nuclei and the variation of Kforbidden E1 transition hindrance factors, Phys. Rev. C 96(3), 034305 (2017)

    ADS  Google Scholar 

  119. J. Park, R. Krucken, D. Lubos, R. Gernhäuser, M. Lewitowicz, et al., Properties of γ-decaying isomers and isomeric ratios in the 100Sn region, Phys. Rev. C 96(4), 044311 (2017)

    ADS  Google Scholar 

  120. H. Suzuki, L. Sinclair, P. A. Soderstrom, G. Lorusso, P. Davies, et al., Discovery of 72Rb: A nuclear sandbank beyond the proton drip line, Phys. Rev. Lett. 119(19), 192503 (2017)

    ADS  Google Scholar 

  121. Y. Shimizu, T. Kubo, N. Fukuda, N. Inabe, D. Kameda, et al., Observation of New Neutron-rich Isotopes among Fission Fragments from In-flight Fission of 345 MeV/nucleon 238U: Search for New Isotopes Conducted Concurrently with Decay Measurement Campaigns, J. Phys. Soc. Jpn. 87(1), 014203 (2018)

    ADS  Google Scholar 

  122. R. Yokoyama, E. Ideguchi, G. S. Simpson, et al., Betagamma spectroscopy of the neutron-rich 150Ba, Prog. Theor. Exp. Phys. 2018, 041D02 (2018)

    Google Scholar 

  123. J. Park, R. Krucken, D. Lubos, R. Gernhäuser, M. Lewitowicz, et al., β decays of the heaviest N = Z - 1 nuclei and proton instability of 97In, Phys. Rev. C 97(5), 051301(R) (2018)

    ADS  Google Scholar 

  124. A. I. Morales, G. Benzoni, H. Watanabe, G. de Angelis, S. Nishimura, et al., Is seniority a partial dynamic symmetry in the first ng 9/2 shell? Phys. Lett. B 781, 706 (2018)

    ADS  Google Scholar 

  125. J. L. Tain, J. Agramunt, D. S. Ahn, A. Algora, J. M. Allmond, et al., The BRIKEN Project: Extensive measurements of β-delayed neutron emitters for the astrophysical r process, Acta Phys. Pol. B 49(3), 417 (2018)

    ADS  Google Scholar 

  126. H. Wang, H. Otsu, H. Sakurai, D. S. Ahn, M. Aikawa, et al., Spallation reaction study for fission products in nuclear waste: Cross section measurements for 137Cs and 90Sr on proton and deuteron, Phys. Lett. B 754, 104 (2016)

    ADS  Google Scholar 

  127. H. Wang, H. Otsu, H. Sakurai, et al., Spallation reaction study for the long-lived fission product 107Pd, Prog. Theor. Exp. Phys. 2017, 021D01 (2017)

    Google Scholar 

  128. S. Kawase, K. Nakano, Y. Watanabe, et al., Study of proton-and deuteron-induced spallation reactions on the long-lived fission product 93Zr at 105 MeV/nucleon in inverse kinematics, Prog. Theor. Exp. Phys. 2017, 093D03 (2017)

    Google Scholar 

  129. Y. Kondo, T. Nakamura, R. Tanaka, R. Minakata, S. Ogoshi, et al., Nucleus 26O: A barely unbound system beyond the drip line, Phys. Rev. Lett. 116(10), 102503 (2016)

    ADS  Google Scholar 

  130. Y. Togano, T. Nakamura, Y. Kondo, J. A. Tostevin, A. T. Saito, et al., Interaction cross section study of the two-neutron halo nucleus 22C, Phys. Lett. B 761, 412 (2016)

    ADS  Google Scholar 

  131. J. W. Hwang, S. Kim, Y. Satou, N. A. Orr, Y. Kondo, et al., Single-neutron knockout from 20C and the structure of 19C, Phys. Lett. B 769, 503 (2017)

    ADS  Google Scholar 

  132. J. Yasuda, M. Sasano, R. G. T. Zegers, et al., Inverse kinematics (p, n) reactions studies using the WINDS slow neutron detector and the SAMURAI spectrometer, Nucl. Instrum. Methods Phys. Res. Sect. B 376, 393 (2016)

    ADS  Google Scholar 

  133. R. Shane, A. B. Mclntosh, T. Isobe, et al., SπRIT: A π time-projection chamber for symmetry-energy studies, Nucl. Instrum. Methods Phys. Res. Sect. A 784, 513 (2015)

    ADS  Google Scholar 

  134. K. Miki, H. Sakai, T. Uesaka, H. Baba, C. L. Bai, et al., Identification of the β + isovector spin monopole Resonance via the 208Pb and 90Zr (t, 3He) Reactions at 300 MeV/u, Phys. Rev. Lett. 108(26), 262503 (2012)

    ADS  Google Scholar 

  135. K. Kisamori, S. Shimoura, H. Miya, S. Michimasa, S. Ota, et al., Candidate resonant tetraneutron state populated by the 4He (8He, 8Be) reaction, Phys. Rev. Lett. 116(5), 052501 (2016)

    ADS  Google Scholar 

  136. S. Noji, H. Sakai, N. Aoi, H. Baba, G. P. A. Berg, et al., Excitation of the isovector spin monopole resonance via the exothermic 90Zr (12N, 12C) reaction at 175 MeV/u, Phys. Rev. Lett. 120(17), 172501 (2018)

    ADS  Google Scholar 

  137. S. Kawase, T. Uesaka, T. L. Tang, et al., Exclusive quasi-free proton knockout from oxygen isotopes at intermediate energies, Prog. Theor. Exp. Phys. 2018, 021D01 (2018)

    Google Scholar 

  138. S. Michimasa, M. Kobayashi, Y. Kiyokawa, S. Ota, D. S. Ahn, et al., Magic nature of neutrons in 54Ca: First mass measurements of 55-57Ca, Phys. Rev. Lett. 121(2), 022506 (2018)

    ADS  Google Scholar 

  139. K. Tsukada, A. Enokizono, T. Ohnishi, K. Adachi, T. Fujita, et al., First elastic electron scattering from 132Xe at the SCRIT facility, Phys. Rev. Lett. 118(26), 262501 (2017)

    ADS  Google Scholar 

  140. K. Morita, et al., RIKEN isotope separator on-line GARIS/IGISOL, Nucl. Instrum. Methods Phys. Res. Sect. B 70, 220 (1992)

    ADS  Google Scholar 

  141. D. Kaji, K. Morimoto, N. Sato, et al., Gas-filled recoil ion separator GARIS-II, Nucl. Instrum. Methods Phys. Res. Sect. B 317, 311 (2013)

    ADS  Google Scholar 

  142. Y. Ito, P. Schury, M. Wada, F. Arai, H. Haba, et al., First direct mass measurements of nuclides around Z = 100 with a multireflection time-of-flight mass spectrograph, Phys. Rev. Lett. 120(15), 152501 (2018)

    ADS  Google Scholar 

  143. T. Otsuka, R. Fujimoto, Y. Utsuno, B. A. Brown, M. Honma, and T. Mizusaki, Magic numbers in exotic nuclei and spin-isospin properties of the NN interaction, Phys. Rev. Lett. 87(8), 082502 (2001)

    ADS  Google Scholar 

Download references

Acknowledgements

Prof. Akito Arima was the President of RIKEN from October 1993 to May 1998, and during the period, Prof. Arima supported the “Radioactive Isotope Beam Factory” (RIBF) project and gave us an ignition key to start the project. At this special occasion of Prof. Akito Arima’s 88th birthday anniversary, this paper is dedicated to him due to his great support and encouragement for RIBF.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Hiroyoshi Sakurai.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Sakurai, H. Nuclear physics with RI Beam Factory. Front. Phys. 13, 132111 (2018). https://doi.org/10.1007/s11467-018-0849-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s11467-018-0849-0

Keywords

Navigation