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Walter, H.*; Colonna, M.*; Cozma, D.*; Danielewicz, P.*; Ko, C. M.*; Kumar, R.*; Ono, Akira*; Tsang, M. Y. B*; Xu, J.*; Zhang, Y.-X.*; et al.
Progress in Particle and Nuclear Physics, 125, p.103962_1 - 103962_90, 2022/07
Times Cited Count：51 Percentile：96.94(Physics, Nuclear)Transport models are the main method to obtain physics information on the nuclear equation of state and in-medium properties of particles from low to relativistic-energy heavy-ion collisions. The Transport Model Evaluation Project (TMEP) has been pursued to test the robustness of transport model predictions to reach consistent conclusions from the same type of physical model. To this end, calculations under controlled conditions of physical input and set-up were performed by the various participating codes. These included both calculations of nuclear matter in a periodic box, which test individual ingredients of a transport code, and calculations of complete collisions of heavy ions. Over the years, five studies were performed within this project. They show, on one hand, that in box calculations the differences between the codes can be well understood and a convergence of the results can be reached. These studies also highlight the systematic differences between the two families of transport codes, known under the names of Boltzmann-Uehling-Uhlenbeck (BUU) and Quantum Molecular Dynamics (QMD) type codes. On the other hand, there still exist substantial differences when these codes are applied to real heavy-ion collisions. The results of transport simulations of heavy-ion collisions will have more significance if codes demonstrate that they can verify benchmark calculations such as the ones studied in these evaluations.
Takahashi, Hidefumi*; Aono, Kai*; Nambu, Yusuke*; Kiyanagi, Ryoji; Nomoto, Takuya*; Sakano, Masato*; Ishizaka, Kyoko*; Arita, Ryotaro*; Ishiwata, Shintaro*
Physical Review B, 102(17), p.174425_1 - 174425_6, 2020/11
Times Cited Count：9 Percentile：52.47(Materials Science, Multidisciplinary)The competing magnetic ground states of the itinerant magnet EuCuSb, which has a hexagonal layered structure, were studied via magnetization, resistivity, and neutron-diffraction measurements on single-crystal samples. EuCuSb has a three-dimensional semimetallic band structure as confirmed by band calculation and angle-resolved photoelectron spectroscopy, consistent with the nearly isotropic metallic conductivity in the paramagnetic state. However, below the antiferromagnetic transition temperature of 
(8.5 K), the resistivity, especially along the hexagonal axis, increases significantly. This implies the emergence of anisotropic magnetic ordering coupled to the conducting electrons. Neutron-diffraction measurements show that the Eu spins, which order ferromagnetically within each layer, are collinearly modulated (up-up-down-down) along the hexagonal axis below , followed by the partial emergence of helical spin modulation below 
(6 K). Based on the observation of anomalous magnetoresistance with hysteretic behavior, we discuss the competing nature of the ground state inherent in a frustrated Heisenberg-like spin system with a centrosymmetric structure.
Mihara, Morihiro; Hirano, Fumio; Takayama, Yusuke; Kyokawa, Hiroyuki*; Ono, Shintaro*
Genshiryoku Bakkuendo Kenkyu (CD-ROM), 24(1), p.15 - 25, 2017/06
A computer program MACBECE has been developed to provide rigorous calculations of the long-term mechanical behavior of a TRU waste geological repository. Consideration is given to the expected chemical alteration of repository components, including cementitious materials and bentonite, and the mechanical interactions between repository and host rock. The long-term mechanical behavior of a TRU waste repository was evaluated in a deep soft rock site, where creep deformation is likely to occur from the initial construction phase to 10
years after repository closure. It was found that the stress didn't fall into a singularity of yield surface of the EC model applied to the mechanical behavior model of bentonite. The calculated displacement of the inner diameter of the repository, considering mechanical interaction between repository and host rock, was about half that of a result in 2nd progress report on R&D for TRU waste disposal in Japan.
Ogata, Kazuyuki*; Matsumoto, Takuma*; Hashimoto, Shintaro; Minomo, Kosho*; Egami, Tomoaki*; Iseri, Yasunori*; Kono, Michio*; Chiba, Satoshi; Bertulani, C. A.*; Shimizu, Yoshifumi*; et al.
Journal of Physics; Conference Series, 312, p.082008_1 - 082008_10, 2011/09
Times Cited Count：1 Percentile：47.48(Physics, Nuclear)Recent studies on breakup reactions with the continuum-discretized coupled channels method are reviewed. The topics covered are: four-body breakup processes for 
He induced reaction, dynamical relativistic effects on coulomb breakup, microscopic description of projectile breakup processes, description of ternary processes (new triple-
reaction rate) and new approach to inclusive breakup processes.
Mihara, Morihiro; Sato, Nobuyuki; Ono, Shintaro*; Morikawa, Seiji*
JAEA-Data/Code 2009-026, 114 Pages, 2010/03
JAEA-Data-Code-2009-026.pdf:15.21MB
This report shows the capability, incorporated mechanical model and sample calculation of MACBECE. MACBECE incorporated the non-liner elastic model for cement-based material, the elasto- viscoplastic model considering swelling of bentonite-based material and the visco-elastic model reported by Okubo for host-rock. Furthermore, MACBECE can consider chemical transition of bentonite-based and cement-based materials.
-nucleus potential and (
,
) inclusive spectrum at 
production threshold regionKono, Michio*; Hashimoto, Shintaro
Progress of Theoretical Physics, 123(1), p.157 - 167, 2010/01
Times Cited Count：10 Percentile：55.25(Physics, Multidisciplinary)The (,) production inclusive spectrum is reinvestigated in view of the very weak -nucleus potential predicted by microscopic calculations with the SU
quark-model baryon-baryon interaction. The inclusive spectrum is evaluated by the semiclassical distorted wave (SCDW) method. The explicit comparison of the strength function with that of the Green function method demonstrates the quantitative reliability of the SCDW approximation. It is presumed that the presently available data at the production threshold region does not necessarily imply the attractive strength of the order of 
MeV for the -nucleus potential in a conventional Woods-Saxon form. Instead, an almost zero potential is preferable.
inclusive spectrum with semiclassical distorted wave modelHashimoto, Shintaro; Kono, Michio*; Ogata, Kazuyuki*; Kawai, Mitsuji*
Progress of Theoretical Physics, 119(6), p.1005 - 1027, 2008/06
Times Cited Count：7 Percentile：46.78(Physics, Multidisciplinary)The inclusive 
momentum spectrum in the 
C reaction is calculated by the semiclassical distorted wave (SCDW) model, including the transition to the 
bound state. We compare the calculated results with those of the previous analysis with Green's function method and that with the intra-nuclear cascade (INC) model, and examine the validity of the assumptions made in those analyses. The calculated spectra with the strength of the -nucleus potential 
, 
and 
MeV are compared with the experimental data measured at High Energy Accelerator Research Organization (KEK) with 
. The shape of the spectrum is reproduced by the calculation, and the inclusive spectrum changes systematically with the assumed strength of the -nucleus potential, but no useful constraint on the strength is obtained from the present analysis.
inclusive spectrum with semiclassical distorted wave modelChiba, Satoshi; Hashimoto, Shintaro; Kono, Michio*; Ogata, Kazuyuki*; Kawai, Mitsuji*
no journal, ,
The data on the production of a hyperon 
in strangeness exchange reactions 
, 
, etc. have been principal sources of information on the single-particle potential of hyperon that reflects the properties of the underlying -
interaction. In the present paper, we calculate the inclusive spectrum in the C reaction at a beam momentum of 1.65 GeV/c with the semiclassical distorted wave (SCDW) model, and aim to clarify the reaction mechanisms in detail. We will also discuss the role of multi-step processes, which can easily be included in the SCDW model analysis, in the study of the hyperon single-particle potential.
reaction on heavy targets with semiclassical distorted wave modelHashimoto, Shintaro; Kono, Michio*; Ogata, Kazuyuki*; Kawai, Mitsuji*
no journal, ,
The data on the production of a hyperon in strangeness exchange reactions , , etc. have been principal sources of information on the single-particle potential of hyperon that reflects the properties of the underlying - interaction. We calculated the inclusive spectrum in the reaction on some heavy targets at a beam momentum of 1.65 GeV/c with the semiclassical distorted wave (SCDW) model. In the present paper, we show the dependence of the spectrum on the target nucleus, and discuss the reaction mechanism in detail.
reaction and potential with semiclassical distorted wave modelHashimoto, Shintaro; Kono, Michio*
no journal, ,
no abstracts in English
Shimizu, Hiroyuki*; Hirano, Fumio; Ono, Shintaro*; Takase, Hiroyasu*; Honda, Akira
no journal, ,
no abstracts in English
