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-curing condition on phase assemblage and mechanical response of C
S pastes; Insights from atomic, crystallographic, and macroscopic deformationsCho, S.*; Im, S.*; 冨永 亜希; 菖蒲 敬久; Bae, S.*; 他5名*
Journal of Building Engineering, 128, p.116694_1 - 116694_31, 2026/06
被引用回数：0 パーセンタイル：0.00(Construction & Building Technology)This study investigates the microstructural characteristics of CS pastes subjected to various CO
- curing regimes and their deformation mechanics at atomic, crystallographic, and macroscopic scales. Specifically, the effects of CO delivery methods and curing pressure are compared. In this studies conditions resulted in severe oscillation in the crystal and atomic scale stress-strain curves due to significant inhomogeneity in the matrix, as evaluated based on the radial distribution of pores. Enclosed CO with atmospheric pressure induced the formation of homogeneous and interlocked structures imparting constant strain propagation. This multiscale stress-strain analyses suggest that a uniform phase distribution facilitates load transfer between reaction products, thereby possibly improving mechanical performance. Additionally, these findings provide advanced insights into the relationships between CO-curing conditions, phase assemblage, and mechanical response.
S and 
SBegala, M.*; Elekes, Z.*; 宇都野 穣; 他75名*
Physical Review C, 113(6), p.064312_1 - 064312_9, 2026/06
被引用回数：0理化学研究所RIBFにて、いくつかの反応チャネルを用いたノックアウト反応によって、SとSの励起状態を生成し、そこからの脱励起ガンマ線の測定によって励起状態を得た。この結果を殻模型計算と比較した結果、実験データをよく説明することがわかった。特にSにおける低い
状態は、この原子核が三軸非対称変形をもっている可能性を示唆している。
Prestwood, D.*; 吉川 貴史; 齊藤 英治; 他15名*
Physical Review B, 113(13), p.134410_1 - 134410_12, 2026/04
被引用回数：2 パーセンタイル：78.36(Materials Science, Multidisciplinary)We study a thin-film yttrium iron garnet sample that exhibits magnetic stripe domains due to a small perpendicular magnetic anisotropy. Using wide-field magneto-optic Kerr effect measurements we reveal the domain pattern evolution as a function of applied field and discuss the role of cubic anisotropy in the domain formation. Rich magnon spectra are observed in the stripe domain states, with a range of excitation conditions providing distinct spectra. The measurements are interpreted using micromagnetic simulations to provide the spatial profiles of each resonance mode. We further simulate domain patterns and resonance spectra accounting for the cubic anisotropy, with good correlation to experiment. This study highlights how noncollinear magnetic domain structures can host complex resonant behavior in a low-damping magnetic material, with potential use in future magnonic applications.
Yates, D.*; Geerlof, E.*; Smallcombe, J.; Hackman, G.*; 他5名*
Journal of Instrumentation (Internet), 21(3), p.P03028_1 - P03028_8, 2026/03
被引用回数：0 パーセンタイル：0.00(Instruments & Instrumentation)TRIFIC, the TRIUMF Fast Ion Counter, is a downstream ionization chamber which provides beam composition monitoring and recoil tagging for in-beam reaction experiments. TRIFIC has been commissioned and deployed for use with radioactive isotope beams at the TRIUMF-ISAC facility. Recently, the detector has been upgraded to include an improved gas window that can accommodate higher beam rates and position-sensitive electrode grids for better position reconstruction.
Lu-DOTATATE therapy in Japan宮司 典明*; 三輪 建太*; 佐藤 達彦; 他25名*
Radiological Physics and Technology, 19(1), p.165 - 175, 2026/03
This study evaluated inter-institutional variability in kidney dosimetry using common Lu-SPECT/CT datasets from the SNMMI Dosimetry Challenge. Ten Japanese centers calculated kidney volumes and absorbed doses with various organ- and voxel-based software. Manual VOI contouring caused large variability (CV up to 16.9%), reduced to 7.4% using common VOIs. Voxel-based dosimetry yielded higher doses but reduced variability, highlighting the need for algorithm standardization to ensure reliable Lu-DOTATATE kidney dosimetry in Japan.
松村 大樹; 辻 卓也; 瀬古 典明*; 他5名*
Journal of Radioanalytical and Nuclear Chemistry, 335(2), p.1543 - 1552, 2026/02
被引用回数：0 パーセンタイル：0.00(Chemistry, Analytical)The COVID-19 pandemic has underscored the need for protective materials with rapid and durable antiviral properties. We developed silver (Ag)-immobilized fabrics via radiation-induced graft polymerization and tested their activity against SARS-CoV-2. The fabrics reduced 40,000 viral particles to below detection within one hour, showed no Ag leaching after 24 h in water, and retained complete antiviral performance after one year of storage. These findings demonstrate the long-term stability and strong potential of Ag-immobilized fabrics for industrial use in protective equipment.
柴崎 千枝; 奥 隆之; 他5名*
Bioengineering (Internet), 12(9), p.981_1 - 981_19, 2025/09
被引用回数：1 パーセンタイル：27.37(Biotechnology & Applied Microbiology)タンパク質およびペプチドは生命維持に不可欠な生体分子であり、重水素化アミノ酸は創薬、代謝トレーシング、中性子散乱研究などの分野でその利用が拡大している。本研究では、側鎖を含む全20種類のタンパク質構成アミノ酸の重水素化を試み、そのうち13種類について効率的な重水素化手法を確立した。Pt/C触媒を用いた水素-重水素交換反応により、反応条件を最適化し、選択的かつ安定的な重水素導入を実現した。さらに、得られた重水素化化合物のうちトリプトファンに焦点を当て、物理化学的特性を評価した。重水素化反応によりアミノ酸がラセミ化したため、キラル分離法を用いて重水素化D/L-トリプトファンを単離した。その結果、重水素化トリプトファンの光安定性が著しく向上する一方、耐酸性については明確な同位体効果は認められなかった。さらに、X線結晶構造解析により、水素から重水素への置換による構造変化は最小限であることが確認された。これらの成果は、重水素化アミノ酸の安定供給に向けた堅牢な基盤を提供し、創薬研究、構造解析、さらには高機能性バイオマテリアル創製への応用を可能にするものである。
Peng, S. Y.*; Gong, W.; Tian, Y. Z.*; Harjo, S.; 他5名*
International Journal of Plasticity, 191, p.104401_1 - 104401_15, 2025/08
被引用回数：23 パーセンタイル：98.19(Engineering, Mechanical)Quantifying the contributions of various strengthening mechanisms is essential for manipulating these mechanisms and designing novel alloys. Although CoCrNi alloys demonstrate exceptional mechanical properties, their strengthening characteristics remain to be investigated. In this work, we conducted in situ neutron diffraction tensile tests and characterized deformation microstructures for CoCrNi alloys with different stacking fault energies (SFEs). The dislocation strengthening characteristics and the role of planar faults were systematically investigated. A reduction in SFE restricts cross slip, thereby increasing the dislocation multiplication rate while decreasing the dislocation strengthening coefficient 
. Additionally, a lower SFE facilitates the simultaneous activation of dislocations and planar faults, with dislocation strengthening consistently playing a dominant role. This work quantifies reasonable values for CoCrNi alloys and identifies cross slip as a critical factor potentially influencing value in face-centered cubic (FCC) alloys.
mesons at finite density using a transport approach in 12 GeV pA reactions市川 真也; Gubler, P.; 成木 恵; KEK-PS E325 Collaboration*; 他25名*
Progress of Theoretical and Experimental Physics (Internet), 2025(9), p.093D01_1 - 093D01_21, 2025/08
被引用回数：5 パーセンタイル：76.34(Physics, Multidisciplinary)The hadron spectrum at finite density is an important observable for exploring the origin of hadron masses. In the KEK-PS E325 experiment, the di-electron decays of mesons inside and outside nuclei were measured using 12 GeV pA reactions. In the previous analysis, a significant excess was observed on the low-mass side of the meson peak in the data for slow-moving mesons (
= 
/
1.25) with the Cu target, and in-medium vector meson spectral modification was verified. We newly employed the PHSD transport approach to take into account the time evolution of spatial density distribution of the target nuclei. Consistent with the previous analysis, a significant excess was observed in the present analysis as well. It was found that incorporating momentum dependence into the spectral modification leads to better agreement with the experimental results. For the slow-moving mesons with the Cu target, the newly obtained modification parameters are consistent with those from the previous analysis within the uncertainties.
SgMosat, P.*; Khuyagbaatar, J.*; D
llmann, Ch. E.*; 佐藤 哲也; Yakushev, A.*; 他15名*
Physical Review Letters, 134(23), p.232501_1 - 232501_6, 2025/06
被引用回数：6 パーセンタイル：76.34(Physics, Multidisciplinary)GSIガス充填反跳分離装置TASCAにおいて、中性子欠損Sg同位体の崩壊特性を、
Cr+
Pb反応を用いて調べた。新同位体Sgの発見について報告する。基底状態は暫定的に9/2
[734]配置とされ、自発核分裂と
粒子放出の両方によって崩壊し、半減期は12.6msであった。この高スピン状態からの崩壊の11
s後に
Rfの核分裂が起こった。
Sgにおいて、陽子数が106の超重核において初めて異性体状態の発生を示す強力な証拠を観測した。今回の実験結果は、核分裂過程における殻効果においてまだ知られていない特徴が中性子不足の超重核において発見される可能性があることを示唆している。
神長 輝一*; 廣瀬 エリ; 他5名*
Journal of Radiation Research (Internet), 66(3), p.318 - 328, 2025/05
被引用回数：0 パーセンタイル：0.00(Biology)Due to the limited number of accelerator-based X-ray facilities worldwide that provide beams with an adjustable size, their application for radiobiological research purposes has been restricted. Thus, the development of alternative methods is of technical importance for investigating cell/tissue responses in spatially non-uniform radiation fields. In this study, we performed mini beam irradiation of cells using a lead (Pb) sub-milli-collimator as an alternative method to sub-millimeter beams. Also, we employed human cervical carcinoma HeLa cells and hTERT-immortalized fibroblast BJ-1 cells that express fluorescence ubiquitination-based cell-cycle indicators (FUCCI). Time-lapse imaging revealed differences in the behavior of HeLa and BJ-1 cells in spatially heterogeneous radiation fields; in the case of HeLa cells, G2/M phase-arrested cells in the cell population were clearly observed, distinguishing irradiated from non-irradiated cells at the sub-millimeter scale level. Our findings indicate that FUCCI can be useful as a biological dose indicator, depending on cell type, and Pb sub-milli-collimators show potential as a possible alternative to accelerator-based X-ray sub-millimeter beams for radiobiological research. The use of the collimators, unlike beamtime experiments in synchrotron facilities with the approval of the committee, is highly versatile and may be beneficial in preliminary studies in a normal laboratory environment.
S and SBegala, M.*; 宇都野 穣; 他85名*
Acta Physica Polonica B; Proceedings Supplement, 18(2), p.2-A17_1 - 2-A17_7, 2025/04
被引用回数：0 パーセンタイル：0.00(Physics, Multidisciplinary)理化学研究所RIBFにて中性子過剰核SとSの励起状態を生成し、そこからの脱励起ガンマ線を観測した。Sについては新たに1500keV、2700keVのガンマ線を、Sについても1本のガンマ線を観測した。今後殻模型計算との比較から、どの状態が観測されたのかなどについて議論する予定である。
Huang, Y.-C.*; 吉川 貴史; 他5名*
Applied Physics Letters, 126(9), p.092403_1 - 092403_6, 2025/03
被引用回数：0 パーセンタイル：0.00(Physics, Applied)The application of spin-current volume effect (SVE) with volume magnetostriction of iron gallium (FeGa) films is examined for micro-diaphragm actuation. A silicon diaphragm measuring 1.5
1.5 mm
is coated with Pt (100-nm-thick) and FeGa (100-nm-thick) thin films. An alternating charge current passed through the FeGa/Pt/Si diaphragm under a magnetic field perpendicular to the charge current generates an alternating spin current via the spin Hall effect in the Pt film, transferring angular momentum from the Pt film to the FeGa film. The injected spin current provides energy and changes the effective temperature, thereby varying the thermal fluctuation of the magnetic moments. In a magnetic material with volume magnetostriction, the thermal fluctuation of the magnetic moments affects its volume. When the spin fluctuations change, the volume magnetostriction induces a corresponding expansion or contraction of the material. Both electrodeposited and ion-beam sputter-deposited FeGa films are investigated, and it is observed that the FeGa film exhibits SVE. The force generated by the SVE is evaluated based on the vibration amplitude at the fundamental resonant mode. This study demonstrates that the force generated by the SVE is correlated with the volume magnetostriction and the deposition process.
excited state and shape coexistence in 
Kr through 
Kr(d,p)Kr reactionWalter, D.*; Smallcombe, J.; 他25名*
Physics Letters B, 862, p.139352_1 - 139352_6, 2025/03
被引用回数：0 パーセンタイル：0.00(Astronomy & Astrophysics)A measurement of the excitation spectrum of Kr via one-neutron transfer to the ground state of Kr using the Kr(d,p)Kr reaction at 8A MeV, observing the outgoing protons, performed with the IRIS facility at TRIUMF is reported. Two states in Kr, at 1.50
0.14 MeV and 2.200.14 MeV, were observed. An adiabatic-wave approximation analysis of the differential cross sections leads us to identify the lower energy state as being populated with neutron transfer to the 3 orbital. This leads to the first observation of the lowest excited state in Kr, hence signaling shape co-existence. Theoretical calculations performed within the in-medium similarity renormalization group framework are presented that also show the existence of a low-energy state, aligning qualitatively with the observation.
清水 翔太*; 佐藤 達彦; 遠藤 章; 他5名*
Radiation Research, 203(3), p.155 - 162, 2025/03
被引用回数：4 パーセンタイル：81.87(Biology)We calculate the mean quality factor based on LET distributions for representative organs and exposure scenarios of A-bomb survivors using PHITS simulations and the Q(L) relationship defined by ICRP, as well as the QF function defined by NASA. We also investigate the depth dependence of the mean quality factors in the ICRU sphere irradiated by mono-energetic neutrons. Both the results from the human phantom and from the ICRU sphere phantom suggest that the mean quality factors are largely independent of the organ type, and independent of depth, city and ground range when the contributions from the secondary gamma-rays are excluded from the neutron doses.
Zhang, Z.*; 船戸 匠*; 松尾 衛; 他5名*
Journal of Magnetism and Magnetic Materials, 610, p.172500_1 - 172500_7, 2024/11
被引用回数：3 パーセンタイル：23.65(Materials Science, Multidisciplinary)We investigate an emergent magneto-inductance (EML) effect using stepwise magnetic field with AC current in Ni
Fe
and Ni
Fe
thin films on glass substrates. The properties of the EML effect were evaluated in terms of frequency, stepwise magnetic field, cross-sectional area, and the proportion of Ni and Fe. As a result, a large EML (
1.5 H) is observed under a low magnetic field of 10 Oe in NiFe thin films at room temperature. The EML effect can be enhanced by increasing the stepwise magnetic field increment or decreasing the cross-sectional area of NiFe thin films. NiFe/glass exhibits a larger EML effect compared to that of NiFe/glass, indicating that the EML depends on the strength of induced magnetic anisotropy. The observed EML effect can be explained by theoretical calculation based on the spin motive force owing to the transient current-driven domain-wall motion. These experimental and theoretical findings provide a deeper understanding on the mechanism of EML effect, and pave the way for potential applications, such as miniaturized inductors and magnetic sensors
Chi, Z.*; 芝田 悟朗; 藤森 淳; 他15名*
Physical Review B, 110(18), p.184401_1 - 184401_8, 2024/11
被引用回数：3 パーセンタイル：8.64(Materials Science, Multidisciplinary)We have studied the Co layer thickness dependences of magnetocrystalline anisotropy (MCA), Dzyaloshinskii-Moriya interaction (DMI), and orbital moment anisotropy (OMA) in W/Co/Pt trilayers, in order to clarify their correlations with each other. We find that the MCA favors magnetization along the film normal and monotonically increases with decreasing effective magnetic layer thickness (
). The magnitude of the Dzyaloshinskii-Moriya exchange constant (
) increases with decreasing until 
1 nm, below which decreases. The MCA and scale with 1/ for larger than 
nm, indicating an interfacial origin. Using X-ray magnetic circular dichroism (XMCD), we find non-zero OMA when is smaller than 
nm. The OMA increases with decreasing more rapidly than what is expected from the MCA, indicating that factors other than OMA contribute to the MCA at small .
Rochman, D.*; 湊 太志; 渡邉 友章; 他52名*
EPJ Nuclear Sciences & Technologies (Internet), 10, p.9_1 - 9_83, 2024/10
This paper summarized the efforts performed to understand decay heat estimation from existing spent nuclear fuel (SNF), under the auspices of the Working Party on Nuclear Criticality Safety (WPNCS) of the OECD Nuclear Energy Agency. Needs for precise estimations are related to safety, cost, and optimization of SNF handling, storage, and repository. The physical origins of decay heat (a more correct denomination would be decay power) are then introduced, to identify its main contributors (fission products and actinides) and time-dependent evolution. Due to limited absolute prediction capabilities, experimental information is crucial; measurement facilities and methods are then presented, highlighting both their relevance and our need for maintaining the unique current full-scale facility and developing new ones. The third part of this report is dedicated to the computational aspect of the decay heat estimation: calculation methods, codes, and validation. Different approaches and implementations currently exist for these three aspects, directly impacting our capabilities to predict decay heat and to inform decision-makers. Finally, recommendations from the expert community are proposed, potentially guiding future experimental and computational developments.
Krajewska, A.*; 辻 卓也; 松村 大樹; 他15名*
Science Advances (Internet), 10(41), p.eadn3880_1 - eadn3880_10, 2024/10
被引用回数：6 パーセンタイル：61.03(Multidisciplinary Sciences)The interplay of spin-orbit coupling with other relevant parameters gives rise to the rich phase competition in complex ruthenates featuring octahedrally coordinated Ru
. While locally, spin-orbit coupling stabilizes a non-magnetic 
= 0 state, intersite interactions resolve one of two distinct phases at low temperatures: an excitonicmagnet stabilized by the magnetic exchange of upper-lying = 1 states or Ru molecular orbital dimers driven by direct orbital overlap. Pyrochlore ruthenates ARuO
(A = rare earth, Y) are candidate excitonic magnets with geometrical frustration. We synthesized InRuO with covalent In-O bonds. This pyrochlore ruthenate hosts alocal = 0 state at high temperatures; however, at low temperatures, it forms a unique nonmagnetic ground state with nearly linear Ru-O-Ru molecules, in stark contrast to other ARuO compounds. The disproportionation of covalent In-O bonds drives RuO molecule formation, quenching not only the local spin-orbit singlet but also geometrical frustration.
Li, P. J.*; 宇都野 穣; 吉田 数貴; 他85名*
Physics Letters B, 855, p.138828_1 - 138828_11, 2024/08
被引用回数：7 パーセンタイル：76.58(Astronomy & Astrophysics)We report on the first measurement of unbound states in 
Ca and 
Ca, populated from 
Ca
reactions. Orbital angular momentum 
assignments were extracted from momentum distributions calculated with the distorted wave impulse approximation (DWIA). The resonances at 5516(41) keV in Ca and 6000(250) keV in Ca indicate a significant = 3 component, providing the first experimental evidence for the 
single-particle strength of unbound hole states in the neutron-rich Ca isotopes. The observed excitation energies and cross-sections point towards extremely localized and well separated strength distributions, with some fragmentation for the orbital in Ca. These results are in good agreement with predictions from shell-model calculations using the effective GXPF1Bs interaction and ab initio calculations and diverge markedly from the experimental distributions in the nickel isotones at Z = 28.
