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Evaluation of excavation damaged zones(EDZs)in Horonobe Underground research Laboratory(URL)

Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 365-378页

作者： Koji Hata Sumio Niunoya Kazuhei Aoyagi Nobukatsu Miyara Obayashi Corporation Technology Research InstituteTechnology DivisionKiyoseTokyo204-8558Japan Obayashi Corporation Nuclear Facilities DivisionSinagawaTokyo108-8502Japan japan atomic {2. Agency Horonobe Underground Research CenterHoronobeHokkaido098-3224Japan

Excavation of underground caverns,such as mountain tunnels and energy-storage caverns,may cause the damages to the surrounding rock as a result of the stress *** this influenced zone,new cracks and discontinuities are created or propagate in the rock ***,it is effective to measure and evaluate the acoustic emission(AE)events generated by the rocks,which is a small elastic vibration,and permeability *** authors have developed a long-term measurement device that incorporates an optical AE(O-AE)sensor,an optical pore pressure sensor,and an optical temperature sensor in a single multi-optical measurement probe(MOP).japan {2. energy Agency has been conducting R&D activities to enhance the reliability of high-level radioactive waste(HLW)deep geological disposal *** a high-level radioactive disposal project,one of the challenges is the development of methods for long-term monitoring of rock mass ***,in January 2.14,the long-term measurements of the hydro-mechanical behavior of the rock mass were launched using the developed MOP in the vicinity of 350 m below the surface at the Horonobe Underground research *** measurement results show that AEs occur frequently up to 1.5 m from the wall during *** addition,hydraulic conductivity increased by 2.4 orders of *** analysis revealed that the hydraulic behavior of the rock mass affected the pore pressure fluctuations and caused *** on this,a conceptual model is developed to represent the excavation damaged zone(EDZ),which contributes to the safe geological disposal of radioactive waste.

关键词： Excavation damaged zone(EDZ) Optical sensor Long-term monitoring Acoustic emission(AE) Shaft sinking

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Lithium Ion Transport Environment by Molecular Vibrations in Ion-Conducting Glasses

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energy & Environmental Materials 2024年第3期7卷 133-142页

作者： Hiroki Yamada Koji Ohara Satoshi Hiroi Atsushi Sakuda Kazutaka lkeda Takahiro Ohkubo Kengo Nakada Hirofumi Tsukasaki Hiroshi Nakajimai Laszlo Temleitner Laszlo Pusztai Shunsuke Ariga Aoto Matsuo Jiong Ding Takumi Nakano Takuya Kimura Ryo Kobayashi Takeshi Usuki Shuta Tahara Koji Amezawa Yoshitaka Tateyama Shigeo Mori Akitoshi Hayashi Diffraction and Scattering Division Japan Synchrotron Radiation Research Institute(JASRI)1-1-1 KoutoSayo-choSayo-gun Hyogo 679-5198Japan Faculty of Materials for energy Shimane University1060Nishi-Kawatsu-ChoMatsue Shimane 690-8504Japan Department of Applied Chemistry Graduate School of EngineeringOsaka Metropolitan University1-1 Gakuen-choSakaiOsaka 599-8531Japan institute of Materials Structure Science High Energy Accelerator Research Organization(KEK)203-1 ShirakataTokai-muraNaka-gunlbaraki 319-1106Japan Graduate School of Engineering chiba University 1-33 Yayoi-cho Inage-kuChiba 263-8522Japan Department of Materials Science Graduate School of EngineeringOsaka Metropolitan University1-1 Gakuen-choSakaiOsaka 599-8531Japan Wigner research Centre for Physics Konkoly Thegeút 29-33 H-1121Budapest Hungary International research Organisation of Advanced Science and technology(IROAST) Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan Department of Applied Physics Nagoya Institute of TechnologyGokisoShowaNagoya 466-8555Japan Faculty of Science Yamagata University1-4-12 KojirakawaYamagata-shiYamagata 990-5860Japan Faculty of Science University of the Ryukyus1 SenbaruNishihara-choOkinawa 903-0213Japan institute of Multidisciplinary research for Advanced Materials Tohoku University2-1-1 KatahiraAoba-kuSendai 980-8577Japan Center for Green research on energy and Environmental Materials(GREEN)and International Center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)TsukubaIbaraki 305-0044Japan

Controlling Li ion transport in glasses at atomic and molecular levels is key to realizing all-solid-state batteries,a promising technology for electric *** this context,Li_(3)PS_(4)glass,a promising solid electrolyte candidate,exhibits dynamic coupling between the Li^(+)cation mobility and the PS_(4)^(3-)anion libration,which is commonly referred to as the paddlewheel *** addition,it exhibits a concerted cation diffusion effect(i.e.,a cation-cation interaction),which is regarded as the essence of high Li ion ***,the correlation between the Li^(+)ions within the glass structure can only be vaguely determined,due to the limited experimental information that can be ***,this study reports that the Li ions present in glasses can be classified by evaluating their valence oscillations via Bader analysis to topologically analyze the chemical *** is found that three types of Li ions are present in Li_(3)PS_(4)glass,and that the more mobile Li ions(i.e.,the Li3-type ions)exhibit a characteristic correlation at relatively long distances of ***,reverse Monte Carlo simulations combined with deep learning potentials that reproduce X-ray,neutron,and electron diffraction pair distribution functions showed an increase in the number of Li3-type ions for partially crystallized glass structures with improved Li ion transport *** results show order within the disorder of the Li ion distribution in the glass by a topological analysis of their ***,considering the molecular vibrations in the glass during the evaluation of the Li ion valences is expected to lead to the development of new solid electrolytes.

关键词： electrolytes ionic conductors modeling molecular dynamics

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Thermally activated delayed fluorescence carbazole-triazine dendrimer with bulky substituents

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Aggregate 2024年第1期5卷 236-243页

作者： Hiroki Ikebe Kohei Nakao Eri Hisamura Minori Furukori Yasuo Nakayama Takuya Hosokai Minlang Yang Guanting Liu Takuma Yasuda Ken Albrecht Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityFukuokaJapan institute for Materials Chemistry and Engineering Kyushu UniversityKasugaJapan Department of Pure and Applied Chemistry Graduate School of Science and TechnologyTokyo University of ScienceNodaChibaJapan National Metrology institute of japan(NMIJ) National Institute of Advanced Industrial Science and Technology(AIST)TsukubaIbarakiJapan institute for Advanced Study Kyushu UniversityNishi-kuFukuokaJapan

Carbazole-triazine dendrimers with a bulky terminal substituent were synthesized,and the thermally activated delayed fluorescence(TADF)property was *** to unsubstituted carbazole dendrimers,dendrimers with bulky terminal substituents showed comparable to better photoluminescence quantum yields(PLQY)in neat ***(PF)-substituted dendrimers showed the highest PLQY of 81%,a smallΔEst of 0.06 eV,and the fastest reverse intersystem crossing(RISC)rate of∼1×10^(5 )s^(−1) compared to other *** measurements of dendrimers and dendrons(fragments)indicate that the close proximity of the triplet energy of phenylfluorene-substituted carbazole dendrons(^(3)LE)to that of phenylfluorene-substituted dendrimers(^(1)CT,^(3)CT)contributes to RISC promotion and improves TADF *** modification fine-tunes the energy level and suppresses intermolecular interactions,and this study provides a guideline for designing efficient solution-processable and non-doped TADF materials.

关键词： dendrimer OLED TADF 1 INTRODUCTION Thermally activated delayed fluorescence(TADF)materials which are inexpensive and highly efficient alternatives to fluorescent

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Numerical analysis of a projecting wall type oscillating water column(PW-OWC)wave energy converter in regular waves

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Journal of Hydrodynamics 2024年第3期36卷 479-491页

作者： Lei Tan Ruiyuan Chang Tomoki Ikoma Department of Oceanic Architecture and Engineering College of Science and TechnologyNihon UniversityChibaJapan

Oscillating water column(OWC)based wave energy absorption devices are classic which have been widely used for harnessing ocean wave *** paper presents a numerical study on a projecting wall(PW)type OWC wave energy converter in regular *** computational fluid dynamics(CFD)modelling of a stationary floating PW-OWC model in a three-dimensional wave flume is achieved by the software *** analyses are carried out based on CFD simulations and the linear potential flow solutions with modifications to account for turbine-induced *** present numerical solutions are validated against our previous experimental *** is found that both the CFD and modified linear potential flow predictions are in reasonably good agreements with the experimental data in the first order results of OWC and air pressure *** the nonlinear responses are included in the result,the modified linear potential flow solution is found to slightly under-estimate the wave energy conversion performance at long *** the airflows above and below the chamber orifice,the CFD results suggest that they are almost unidirectional,oscillating in not only the base frequency but also subharmonic and ultraharmonic *** evolution of the OWC responses during an entire period and the phase analysis based on CFD simulations are *** phase results provide the crucial evidence to the reasonability of the physics-based modification of the potential flow model in modelling of *** present results and analysis are expected to be beneficial to the understanding on the physical mechanism of OWCs and the design of phase control strategies.

关键词： Computational fluid dynamics(CFD)simulation hydrodynamic analysis oscillating water column(OWC)damping orifice airflow phase difference

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Multi-quasiparticle excitations in ^(145)Tb

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Science China(Physics,Mechanics & Astronomy) 2004年第5期47卷 561-570页

作者： T. Hayakawa M. Oshima T. Toh T. Shizuma J. Katakura Y. Hatsukawa M. Matsuda H. Kusakari M. Sugawara japan atomic {2. research institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanChiba University Inage-ku Chiba 263-8512 JapanChiba Institute of Technology Narashino Chiba 275-0023 Japan

High-spin states in 145Tb have been populated using the 118Sn (32., 1p4n) reaction at beam energy of 165 MeV. The level scheme of 145Tb has been established up to Ex ≈7.4 MeV. The level scheme shows characteristics of a spherical or slightly oblate nucleus. Based on the systematic trends of the level structure in the neighboring N = 80 isotones, the level structure in 145Tb below 2.MeV excitation is well explained by coupling an h11/2.alence proton to the even-even 144Gd core. Above 2.MeV excitation, most of the yrast levels are interpreted with multi-quasiparticle shell-model configurations.

关键词： high-spin states, level scheme, multi-quasiparticle excitations.

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High-spin states in ^(190)Pt

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Chinese Physics C 2008年第1期32卷 31-33页

作者：马龙周小红 M.Oshima Y.Toh 张玉虎郭应祥雷相国 M.Koizumi A.Osa T.Hayakawa Y.Hatsukawa T.Shizuma M.Sugawara institute of Modern Physics Chinese Academy of Sciences japan atomic {2. research institute.Tokai Ibaraki 319-1195 Japan japan atomic {2. research institute Tokai Ibaraki 319-1195Japan chiba institute of {2. Narashino Chiba 275-0023Japan

The level structure of ^19Opt has been studied experimentally using the ^176yb （^18O, 4n） reaction at beam energies of 88 and 95 MeV. γ-γ-t coincidence measurements were carried out. Based on the analysis of T-T coincidence relationships, the level scheme of ^190Pt is extended to high-spin states. A new structure built on the 3413.6 keV 14＋ state has been observed, and the ＂vi13/2.-2.vh9/2.-1 vj （j = P3/2.or f5/2. configuration is tentatively assigned to it.

关键词： γ-γcoincidence γ-ray spectroscopy DCO ratio

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Unveiling the correlation between structural alterations and enhanced high-voltage cyclability in Na-deficient P3-type layered cathode materials via Li incorporation

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Electron 2024年第1期2卷 164-176页

作者： Xiaoxia Yang Suning Wang Hang Li Jochi Tseng Zhonghua Wu Sylvio Indris Helmut Ehrenberg Xiaodong Guo Weibo Hua School of Chemical Engineering and technology Xi'an Jiaotong UniversityXi'anChina School of Chemical Engineering Sichuan UniversityChengduChina institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)Eggenstein‐LeopoldshafenGermany Diffraction and Scattering Division Japan Synchrotron Radiation Research Institute(JASRI)KoutoSayo‐choSayo‐gunHyogoJapan Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina

With exceptional capacity during high-voltage cycling,P3-type Nadeficient layered oxide cathodes have captured substantial ***,they are plagued by severe capacity degradation over *** this study,tuning and optimizing the phase composition in layered oxides through Li incorporation are proposed to enhance the high-voltage *** structural dependence of layered Na_(2.3)LixNi_(0.2.)Mn_(0.75)O_(2.þδoxides on the lithium content(0.0≤x≤1.0)offered during synthesis is investigated systematically on an atomic ***,increasing the Li content triggers the formation of mixed P2.O3-type or P3/P2.O3-type layered *** the voltage window is 1.5-4.5 V,P3-type Na2.3Ni_(0.2.)Mn_(0.75)O_(2.(NL0.0NMO,R3m)material exhibits a sequence of phase transformations throughout the process of(de)sodiation,that is,O3⇌P3⇌O30⇌O3″.Such complicated phase transitions can be effectively suppressed in the Na2.3Li_(0.7)Ni_(0.2.)Mn_(0.75)O_(2.4)(NL_(0.7)NMO)oxide with P2.P3/O3-type mixed ***,cathodes made of NL0.7NMO exhibit a substantially enhanced cyclic performance at high voltages compared to that of the P3-type layered NL0.0NMO ***,NL0.7NMO demonstrates an outstanding capacity retention of 98%after 10 cycles at 1 C within 1.5-4.5 V,much higher than that of NL0.0NMO(83%).This work delves into the intricate realm of bolstering the high-voltage durability of layered oxide cathodes,paving the way for advanced sodium-ion battery technologies.

关键词： high-voltage cycling Li incorporation phase transition sodium ion batteries triphasic composites

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Properties of the πh9/2.× vi13/2.Oblate Band in ^188Tl

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Chinese Physics Letters 2006年第7期23卷 1727-1730页

作者：马龙周小红邢烨炳张玉虎郭应祥雷相国谢成营 Oshima M. Toh Y. Koizumi M. Osa A. Hatsukawa Y. Sugawara M. institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 japan atomic {2. research institute Tokai Ibaraki 319-1195 Japan chiba institute of {2. Narashino Chiba 275-0023 Japan

High spin states in ^188Tl have been investigated via the 157Gd（^35Cl,4n） reaction at beam energy of 170 MeV. A rotational band built on the πh9/2.× vi13/2.configuration with oblate deformation has been established. Considering the similarity between the band structure observed in odd-odd Tl nuclei, spin values have been tentatively proposed for the new band in ^188Tl. The πh9/2.× vi13/2.oblate band in ^188Tl shows low-spin signature inversion, and it can be interpreted qualitatively by the two quasiparticle plus rotor model including a J-dependent p-n residual interaction.

关键词： πh9/2.i13/2.Oblate 188Tl interpreted qualitatively

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Results and Future Plan of JT-60U towards Steady-State Tokamak Reactor

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Plasma Science and technology 2004年第1期6卷 2151-2158页

作者： S.Sakurai the JT-60 Team japan atomic {2. research institute Naka Ibaraki 311-0193 JapanJapan Atomic Energy Research Institute Naka Ibaraki 311-0193 Japan

Recent results of JT-60U towards establishment of physics basis for ITER andadvanced tokamak operation are presented. Progress in high integrated performance is achieved withimprovement of N-NB and ECRF heating systems. In the next experimental campaign 2.03～2.04,discharge duration with 17 MW heating will be extended up to 30s for sustaining high-beta plasmalonger than the current diffusion time. Superconducting modification of JT-60 is planned todemonstrate high-beta plasma sustainment exceeding ideal MHD instability limit without wallstabilization.

关键词： JT-60U confinement study steady-state operation high confinement plasma plan and future plan

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通过Tcc+的研究得到与■强耦合的奇特强子态的新内部图像（英文）

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Science Bulletin 2024年第19期 3036-3041页

作者：王广娟杨智吴佳俊 Makoto Oka 朱世琳 KEK Theory Center Institute of Particle and Nuclear Studies (IPNS) High Energy Accelerator Research Organization (KEK) School of Physics University of Electronic Science and Technology of China School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Southern Center for Nuclear-Science Theory (SCNT) Institute of Modern Physics Chinese Academy of Sciences Advanced Science research Center Japan Atomic Energy Agency Nishina Center for Accelerator-Based Science RIKEN School of Physics and Center of High energy Physics Peking University

We have investigated the internal structure of the open-and hidden-charmed ■ molecules in the unified *** first fit the experimental lineshape of the T+ccstate and extract the DD*interaction,from which the T+ccis assumed to arise *** we obtain the ■interaction by charge *** results show that the ■interaction is attractive but insufficient to form X（3872. as a bound ***,its formation requires the crucial involvement of the coupled channel effect between the ■components,although the ■accounts for approximately 1%*** X（3872.,we have obtained a higher-energy state around 3957.9 MeV with a width of 16.7 MeV,which may be a potential candidate for the X（3940）.In JPC=1+-sector,we have found two states related to the iso-scalar■ and hc（2.）,*** combined study provides valuable insights into the nature of these ■exotic states.

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