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Research Interest

Publication List

  1. [1] "Optimization of basis functions for the multi-configuration mixing using the Replica Exchange Monte-Carlo method and its application to 12C",
    Takatoshi Ichikawa and Naoyuki Itagaki,
    Phys. Rev. C 105, 024314 2022 [14 pages]. [PRC] [arXiv]
  2. [2] "Semiclassical origin of asymmetric nuclear fission: nascent-fragment shell effect in periodic-orbit theory",
    Ken-ichiro Arita, Takatoshi Ichikawa and Kenichi Matsuyanagi,
    Phys. Scr. 95, 024003 2020 [10 pages]. [URL] [arXiv]
  3. [3] "The microscopic mechanism behind the fission-barrier asymmetry (II): The rare-earth region 50 < Z < 82 and 82 < N < 126",
    T. Ichikawa and P. Möller,
    Phys. Lett. B789, 679 2018 [6 pages]. [PLB] [arXiv]
  4. [4] "Nascent fragment shell effects on the nuclear fission processes in semiclassical periodic orbit theory",
    Ken-ichiro Arita, Takatoshi Ichikawa, and Kenichi Matsuyanagi,
    Phys. Rev. C 98, 064311 2018 [12 pages]. [PRC] [arXiv]
  5. [5] "Effect of 12C + α clustering on the E0 transition in 16O",
    H. Matsuno, N. Itagaki, T. Ichikawa, Y. Yoshida, and Y. Kanada-En'yo,
    Prog. Theor. Exp. Phys. 2017, 063D01 2017 [16 pages]. [PTEP] [arXiv]
  6. [6] "New and efficient method for solving the eigenvalue problem for the two-center shell model with finite-depth potentials",
    K. Hagino and T. Ichikawa,
    Phys. Rev. C 95, 054620 2017 [7 pages]. [PRC] [arXiv]
  7. [7] "Nuclear ground-state masses and deformations: FRDM(2012)",
    P. Möller, A. J. Sierk, T. Ichikawa, and H. Sagawa,
    At. Data Nucl. Data Tables 109-110, 1 2016 [204 pages]. [ADNDT] [arXiv]
  8. [8] "Evolution of fusion hindrance for asymmetric systems at deep sub-barrier energies",
    A. Shrivastava, K. Mahata, S.K. Pandit, V. Nanal, T. Ichikawa, K. Hagino, A. Navin, C.S. Palshetkar, V.V. Parkar, K. Ramachandran, P.C. Rout, Abhinav Kumar, A. Chatterjee, S. Kailas,
    Phys. Lett. B755, 332 2016 [5 pages]. [PLB] [arXiv]
  9. [9] "A Method to Calculate Fission-Fragment Yields Y(Z,N) versus Proton and Neutron Number in the Brownian Shape-Motion Model. Application to calculations of U and Pu charge yields",
    Peter Möller and Takatoshi Ichikawa,
    Eur. Phys. J. A 51, 173 2015 [11 pages]. [EPJA] [arXiv]
  10. [10] "Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach",
    Takatoshi Ichikawa,
    Phys. Rev. C 92, 064604 2015 [19 pages]. [PRC] [arXiv]
  11. [11] "Universal damping mechanism of quantum vibrations in deep sub-barrier fusion reactions",
    Takatoshi Ichikawa and Kenichi Matsuyanagi,
    Phys. Rev. C 92, 021602(R) 2015 [4 pages]. [PRC] [arXiv]
    Selected by Editor's Suggestion
  12. [12] "Examination of the stability of a rod-shaped structure in 24Mg",
    Yoritaka Iwata, Takatoshi Ichikawa, Naoyuki Itagaki, Joachim A. Maruhn, and Takaharu Otsuka,
    Phys. Rev. C 92, 011303(R) 2015 [5 pages]. [PRC] [arXiv]
  13. [13] "Fission barriers at the end of the chart of the nuclides",
    Peter Möller, Arnold J. Sierk, Takatoshi Ichikawa, Akira Iwamoto, and Matthew Mumpower,
    Phys. Rev. C 91, 024310 2015 [27 pages]. [PRC]
  14. [14] "High-spin torus isomers and their precession motions",
    T. Ichikawa, K. Matsuyanagi, J. A. Maruhn, N. Itagaki,
    Phys. Rev. C 90, 034314 2014 [13 pages]. [PRC] [arXiv]
  15. [15] "Fission-fragment charge yields: Variation of odd-even staggering with element number, energy, and charge asymmetry",
    Peter Möller, Jørgen Randrup, Akira Iwamoto, and Takatoshi Ichikawa,
    Phys. Rev. C 90, 014601 2014 [5 pages]. [PRC]
  16. [16] "Pure collective precession motion of a high-spin torus isomer",
    T. Ichikawa, K. Matsuyanagi, J. A. Maruhn, and N. Itagaki,
    Phys. Rev. C 89, 011305(R) 2014 [4 pages]. [PRC] [arXiv]
  17. [17] "Damping of quantum vibrations revealed in deep sub-barrier fusion",
    Takatoshi Ichikawa and Kenichi Matsuyanagi,
    Phys. Rev. C 88, 011602(R) 2013 [4 pages]. [PRC] [arXiv]
  18. [18] "Combinatorial nuclear level-density model",
    H. Uhrenholt, S. Åberg, A. Dobrowolski, Th. Døssing, T. Ichikawa, P. Möller,
    Nucl. Phys. A913, 127 2013 [30 pages]. [NPA] [arXiv]
  19. [19] "Character and prevalence of third minima in actinide fission barriers",
    Takatoshi Ichikawa, Peter Möller, and Arnold J. Sierk,
    Phys. Rev. C 87, 054326 2013 [4 pages]. [PRC] [arXiv]
  20. [20] "Ground-state configuration of the N=157 nucleus 259No",
    M. Asai, K. Tsukada, M. Sakama, H. Haba, T. Ichikawa, Y. Ishii, A. Toyoshima, T. Ishii, I. Nishinaka, Y. Nagame, Y. Kasamatsu, M. Shibata, Y. Kojima, and H. Hayashi,
    Phys. Rev. C 87, 014332 2013 [6 pages]. [PRC]
  21. [21] "Existence of an Exotic Torus Configuration in High-Spin Excited States of 40Ca",
    T. Ichikawa, J. A. Maruhn, N. Itagaki, K. Matsuyanagi, P.-G. Reinhard, and S. Ohkubo,
    Phys. Rev. Lett. 109, 232503 2012 [4 pages]. [PRL] [arXiv]
  22. [22] "Search for three-α states around an 16O core in 28Si",
    T. Ichikawa, N. Itagaki, Y. Kanada-En'yo, Tz. Kokalova, and W. von Oertzen,
    Phys. Rev. C 86, 031303(R) 2012 [5 pages]. [PRC] [arXiv]
  23. [23] "Contrasting fission potential-energy structure of actinides and mercury isotopes",
    Takatoshi Ichikawa, Akira Iwamoto, Peter Möller, and Arnold J. Sierk,
    Phys. Rev. C 86, 024610 2012 [8 pages]. [PRC] [arXiv]
    Selected by Rev. Mod. Phys. 85, 1541 (2013).
  24. [24] "Nuclear Shape Isomers",
    P. Möller, A. J. Sierk, R. Bengtsson, H. Sagawa, and T. Ichikawa,
    At. Data Nucl. Data Tables 98, 149 2012 [152 pages]. [ADNDT]
  25. [25] "Linear chain structure of four-α clusters in 16O",
    T. Ichikawa, J. A. Maruhn, N. Itagaki, S. Ohkubo,
    Phys. Rev. Lett. 107, 112501 2011 [4 pages]. [PRL] [arXiv]
    See also Phys. Rev. Focus 28, 10 (2011)
  26. [26] "Three triton states in 9Li",
    K. Muta, T. Furumoto, T. Ichikawa, N. Itagaki,
    Phys. Rev. C 84, 034305 2011 [6 pages]. [PRC] [arXiv]
  27. [27] "Production and Decay Properties of 264Hs and 265Hs",
    Nozomi SATO, Hiromitsu HABA, Takatoshi ICHIKAWA, Daiya KAJI, Yuki KUDOU, Kouji MORIMOTO, Kosuke MORITA, Kazutaka OZEKI, Takayuki SUMITA, Akira YONEDA, Eiji IDEGUCHI, Hiroyuki KOURA, Akira OZAWA, Tsutomu SHINOZUKA, Takayuki YAMAGUCHI, and Atsushi YOSHIDA,
    J. Phys. Soc. Jpn. 80, 094201 2011 [7 pages]. [JPSJ]
  28. [28] "Gas-like state of alpha clusters around a 16O core in 24Mg",
    T. Ichikawa, N. Itagaki, T. Kawabata, Tz. Kokalova, W. von Oertzen,
    Phys. Rev. C 56, 014315(R) 2011 [4 pages]. [PRC] [arXiv]
  29. [29] "Cluster formations in deformed states for 28Si and 32S",
    Takatoshi Ichikawa, Yoshiko Kanada-En'yo, and Peter Möller,
    Phys. Rev. C 83, 054319 2011 [7 pages]. [PRC] [arXiv]
  30. [30] "Neutron one-quasiparticle states in 251Fm151 populated via the α decay of 255No",
    M. Asai, K. Tsukada, H. Haba, Y. Ishii, T. Ichikawa, A. Toyoshima, T. Ishii, Y. Nagame, I. Nishinaka, Y. Kojima, and K. Sueki,
    Phys. Rev. C 83, 014315 2011 [12 pages]. [PRC]
  31. [31] "A New Type of Asymmetric Fission in Proton-Rich Nuclei",
    A. N. Andreyev, J. Elseviers, M. Huyse, P. Van Duppen, S. Antalic, A. Barzakh, N. Bree, T.E. Cocolios, V. F. Comas, J. Diriken, D. Fedorov, V. Fedosseev, S. Franchoo, J.A. Heredia, O. Ivanov, U. Köster, B. A. Marsh, K. Nishio, R.D. Page, N. Patronis, M. Seliverstov, I. Tsekhanovich, P. Van den Bergh, J. Van De Walle, M. Venhart, S. Vermote, M. Veselsky, C. Wagemans, T. Ichikawa, A. Iwamoto, P. Möller, and A. J. Sierk,
    Phys. Rev. Lett. 105, 252502 2010 [5 pages]. [PRL]
    Selected by Editors suggestion.
    See also Nature News and Letter, doi:10.1038/news.2010.642
    See also Science News 179, 1 (2011)
  32. [32] "Calculations of Branching Ratios for Radiative-Capture, One-Proton, and Two-Neutron Channels in the Fusion Reaction 209Bi+70Zn",
    Takatoshi Ichikawa and Akira Iwamoto,
    J. Phys. Soc. Jpn. 79, 074201 2010 [6 pages]. [JPSJ] [arXiv]
    Selected as Research Highlight in 2011 by RIKEN
  33. [33] "Exploring Fusion at Extreme Sub-Barrier Energies with Weakly Bound Nuclei",
    A. Shrivastava, A. Navin, A. Lemasson, K. Ramachandran, V. Nanal, M. Rejmund, K. Hagino, T. Ichikawa, S. Bhattacharyya, A. Chatterjee, S. Kailas, K. Mahata, V. V. Parkar, R. G. Pillay, and P. C. Rout,
    Phys. Rev. Lett. 103, 232702 2009 [4 pages]. [PRL]
  34. [34] "Global Calculation of Nuclear Shape Isomers",
    Peter Möller, Arnold J. Sierk, Ragnar Bengtsson, Hiroyuki Sagawa, and Takatoshi Ichikawa,
    Phys. Rev. Lett. 103, 212501 2009 [4 pages]. [PRL]
  35. [35] "Signature of Smooth Transition from Sudden to Adiabatic States in Heavy-Ion Fusion Reactions at Deep Sub-Barrier Energies",
    Takatoshi Ichikawa, Kouichi Hagino, and Akira Iwamoto,
    Phys. Rev. Lett. 103, 202701 2009 [4 pages]. [PRL] [arXiv]
  36. [36] "Heavy-element fission barriers",
    Peter Möller, Arnold J. Sierk, Takatoshi Ichikawa, Akira Iwamoto, Ragnar Bengtsson, Henrik Uhrenholt, and Sven Åberg,
    Phys. Rev. C 79, 064304 2009 [38 pages]. [PRC]
  37. [37] "Decay Properties of 266Bh and 262Db Produced in the 248Cm + 23Na Reaction",
    Kosuke Morita, Kouji Morimoto, Daiya Kaji, Hiromitsu Haba, Kazutaka Ozeki, Yuki Kudou, Nozomi Sato, Takayuki Sumita, Akira Yoneda, Takatoshi Ichikawa, Yasuyuki Fujimori, Sin-ichi Goto, Eiji Ideguchi, Yoshitaka Kasamatsu, Kenji Katori, Yukiko Komori, Hiroyuki Koura, Hisaaki Kudo, Kazuhiro Ooe, Akira Ozawa, Fuyuki Tokanai, Kazuaki Tsukada, Takayuki Yamaguchi, and Atsushi Yoshida,
    J. Phys. Soc. Jpn. 78, 064201 2009 [6 pages]. [JPSJ]
  38. [38] "Production and Decay Properties of 263Hs",
    Daiya Kaji, Kouji Morimoto, Nozomi Sato, Takatoshi Ichikawa, Eiji Ideguchi, Kazutaka Ozeki, Hiromitsu Haba, Hiroyuki Koura, Yuki Kudou, Akira Ozawa, Takayuki Sumita, Takayuki Yamaguchi, Akira Yoneda, Atsushi Yoshida, and Kosuke Morita,
    J. Phys. Soc. Jpn. 78, 035003 2009 [2 pages]. [JPSJ]
  39. [39] "Chaos and structure of level densities",
    Sven Åberg, Henrik Uhrnholt, Takatoshi Ichikawa, Peter Möller,
    Int. J. Mod. Phys. E 18, 926 2009 [9 pages]. [URL]
  40. [40] "Origin of the narrow, single peak in the fission-fragment mass distribution for 258Fm",
    Takatoshi Ichikawa, Akira Iwamoto, and Peter Möller,
    Phys. Rev. C 79, 014305 2009 [6 pages]. [PRC] [arXiv]
  41. [41] "Axial and reflection asymmetry of the nuclear ground state",
    P. Möller, R. Bengtsson, B.G. Carlsson, P. Olivius, T. Ichikawa, H. Sagawa and A. Iwamoto,
    At. Data Nucl. Data Tables 94, 758 2008 [23 pages]. [ADNDT]
  42. [42] "Systematics of threshold incident energy for deep sub-barrier fusion hindrance",
    Takatoshi Ichikawa, Kouichi Hagino, and Akira Iwamoto,
    Phys. Rev. C 75, 064612 2007 [4 pages]. [PRC] [arXiv]
  43. [43] "Existence of a one-body barrier revealed in deep subbarrier fusion",
    Takatoshi Ichikawa, Kouichi Hagino, and Akira Iwamoto,
    Phys. Rev. C 75, 057603 2007 [4 pages]. [PRC] [arXiv]
  44. [44] "Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid",
    H. Haba, K. Tsukada, M. Asai, A. Toyoshima, Y. Ishii, H. Toume, T. Sato, I. Nishinaka, T. Ichikawa, S. Ichikawa, Yuichi Nagame, W. Sato, K. Matsuo, Y. Kitamoto, Y. Tashiro, Atsushi Shinohara, J. Saito, M. Ito, T. Ikezawa, M. Sakamaki, S. Goto, H. Kudo, H. Kikunaga, M. Arai, S. Kamataki, A. Yokoyama, K. Akiyama, K. Sueki, Y. Oura, M. Schädel, W. Brüchle and J.V. Kratz,
    Radiochim. Acta 95, 1 2007 [6 pages]. [URL]
  45. [45] "Global Calculations of Ground-State Axial Shape Asymmetry of Nuclei",
    Peter Möller, Ragnar Bengtsson, B. Gillis Carlsson, Peter Olivius, and Takatoshi Ichikawa,
    Phys. Rev. Lett. 97, 162502 2006 [4 pages]. [PRL]
  46. [46] "Effect of charge polarization on the Coulomb barrier for cold-fusion reactions",
    Takatoshi Ichikawa and Akira Iwamoto,
    Phys. Rev. C 71, 067601 2005 [4 pages]. [PRC]
  47. [47] "Barrier for cold-fusion production of superheavy elements",
    Takatoshi Ichikawa, Akira Iwamoto, Peter Möller and Arnold J. Sierk,
    Phys. Rev. C 71, 044608 2005 [11 pages]. [PRC]
  48. [48] "Dynamical Calculation of Multi-Modal Nuclear Fission of Fermium Nuclei",
    T. Asano, T. Wada, M. Ohta, T. Ichikawa, S. Yamaji, and H. Nakahara,
    J. Nucl. Radiochem. Sci. 3, 67 2004 [5 pages]. [URL]
  49. [49] "Cluster expression in fission and fusion in high-dimensional macroscopic-microscopic calculations",
    A. Iwamoto, T. Ichikawa, P. Möller and A.J. Sierk,
    Nucl. Phys. A738, 499 2004 [4 pages]. [NPA]
  50. [50] "Dynamics of Fission Modes Studied with the 3-dimensional Langevin Equation",
    T. Ichikawa, T. Asano, T. Wada, and M. Ohta,
    J. Nucl. Radiochem. Sci. 3, 67 2002 [3 pages]. [URL]
  51. [51] "Fission Width of Compound Nuclei Calculated Using the Mean First Passage Time Method",
    Takatoshi Ichikawa, Takahiro Wada and Masahisa Ohta,
    Prog. Theor. Phys. 105, 915 2001 [8 pages]. [PTP]