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兼田 加珠子*; 白神 宜史*; 角永 悠一郎*; 渡部 直史*; 大江 一弘*; Yin, X.*; 羽場 宏光*; 白崎 謙次*; 菊永 英寿*; 塚田 和明; et al.
International Journal of Molecular Sciences (Internet), 25(2), p.933_1 - 933_14, 2024/01
被引用回数：1 パーセンタイル：0.01(Biochemistry & Molecular Biology)Currently, targeted alpha therapy (TAT) is a new therapy involving the administration of a therapeutic drug that combines a substance of 
-emitting nuclides that kill cancer cells and a drug that selectively accumulates in cancer cells. We labeled the compounds targeting prostate specific membrane antigen (PSMA) with 
At and 
Ac. PSMA is a molecule that has attracted attention as a theranostic target for prostate cancer, and several targeted radioligands have already shown therapeutic effects in patients. The results showed that At, which has a much shorter half-life, is no less cytotoxic than Ac. In At labeling, our group has also developed an original method (Shirakami Reaction). We have succeeded in obtaining a highly purified labeled product in a short timeframe using this method.
He, H.*; Naeem, M.*; Zhang, F.*; Zhao, Y.*; Harjo, S.; 川崎 卓郎; Wang, B.*; Wu, X.*; Lan, S.*; Wu, Z.*; et al.
Nano Letters, 21(3), p.1419 - 1426, 2021/02
被引用回数：41 パーセンタイル：95.34(Chemistry, Multidisciplinary)In CrCoNi, a so-called medium-entropy alloy, an fcc-to-hcp phase transformation has long been anticipated. Here, we report an in situ loading study with neutron diffraction, which revealed a bulk fcc-to-hcp phase transformation in CrCoNi at 15 K under tensile loading. By correlating deformation characteristics of the fcc phase with the development of the hcp phase, it is shown that the nucleation of the hcp phase was triggered by intrinsic stacking faults. The confirmation of a bulk phase transformation adds to the myriads of deformation mechanisms available in CrCoNi, which together underpin the unusually large ductility at low temperatures.
Xu, Z.*; Dai, G.*; Li, Y.*; Yin, Z.*; Rong, Y.*; Tian, L.*; Liu, P.*; Wang, H.*; Xing, L.*; Wei, Y.*; et al.
npj Quantum Materials (Internet), 5(1), p.11_1 - 11_7, 2020/02
被引用回数：4 パーセンタイル：40.81(Materials Science, Multidisciplinary)We use neutron scattering to study Vanadium (hole)-doped LiFe
V
As. In the undoped state, LiFeAs exhibits superconductivity at 
K and transverse incommensurate spin excitations similar to electron overdoped iron pnictides. Upon Vanadium doping to form LiFe
V
, the transverse incommensurate spin excitations in LiFeAs transform into longitudinally elongated ones in a similar fashion to that of potassium (hole)-doped Ba
K
Fe
As but with dramatically enhanced magnetic scattering and elimination of superconductivity. This is different from the suppression of the overall magnetic excitations in hole-doped BaFeAs and the enhancement of superconductivity near optimal hole doping. These results are consistent with density function theory plus dynamic mean field theory calculations, suggesting that Vanadium doping in LiFeAs may induce an enlarged effective magnetic moment 
with a spin crossover ground state arising from the inter-orbital scattering of itinerant electrons.
GeWo, H.*; Wang, Q.*; Shen, Y.*; Zhang, X.*; Hao, Y.*; Feng, Y.*; Shen, S.*; He, Z.*; Pan, B.*; Wang, W.*; et al.
Physical Review Letters, 122(21), p.217003_1 - 217003_5, 2019/05
被引用回数：5 パーセンタイル：42.69(Physics, Multidisciplinary)We report neutron scattering measurements of single-crystalline YFeGe in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFeGe does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFeGe displays anisotropic stripe-type antiferromagnetic spin fluctuations at (
). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (
). These ferromagnetic spin fluctuations are isotropic in the (
) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFeGe and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.
and search for 
at 
= 10.96 - 11.05 GeVYin, J. H.*; 谷田 聖; Belle Collaboration*; 他189名*
Physical Review D, 98(9), p.091102_1 - 091102_9, 2018/11
被引用回数：4 パーセンタイル：23.83(Astronomy & Astrophysics)We report searches for the processes 
and 
(J=1,2) in the vicinity of the 
resonance using energy scan data collected by the Belle experiment at the KEKB collider. We observe 
and find evidence for 
processes for data with center-of-mass energies from 10.96 to 11.05~GeV for the first time. The statistical significance for 
and 
are 
and 
, respectively. We investigate energy dependence of the cross section and find that it is consistent with production of 
and resonances without significant non-resonant contribution. Assuming 
proceeds via and , the branching fraction 
is measured for the first time, where the first error is statistical, the second is systematic, and the third from the branching fraction of 
. The signals for 
are not significant, and the upper limits of the Born cross sections at the 90% confidence level are 
and 
~pb for 
and 
, respectively, for center-of-mass energies from 10.96 to 11.05 GeV.
Yin, H.*; Chung, B.*; Chen, F.*; 大内 隆成*; Zhao, J.*; 田中 伸幸; Sadoway, D. R.*
Nature Energy (Internet), 3(2), p.127 - 131, 2018/02
被引用回数：55 パーセンタイル：87.54(Energy & Fuels)リチウムイオン選択性を有する多孔質伝導膜を用い、正極と負極の電極金属を分離することで、性能劣化が小さく、高い充放電効率が得られるこれまでにない概念の溶融塩蓄電池の開発を行った。多孔質伝導膜にセラミックスの窒化チタン焼結体を、正・負極材に、それぞれ鉛及びリチウム鉛を使用した蓄電池を作製し、作動温度410
Cにおける100サイクル試験を行った。初期の100サイクル平均の性能で、充放電効率が90%以上と優れた性能を達成するとともに、その間の充放電効率の低下速度は1サイクル当たり0.0017%が得られた。これは10年経過後も充放電効率の劣化は10%以下と高寿命であることを示している。また、多孔質状金属(ステンレス及びチタン)に窒化チタンをコーティングした多孔質伝導膜を使用した場合においても、同様の充放電効率を示すことを明らかにした。このように本開発で導入した金属を基盤とする多孔質伝導膜は、低電気抵抗が可能な薄膜化かつ工業的スケールアップに向けた大型化が期待できるものである。
TAs (
= Co,Ni)Tam, D. M.*; Song, Y.*; Man, H.*; Cheung, S. C.*; Yin, Z.*; Lu, X.*; Wang, W.*; Frandsen, B. A.*; Liu, L.*; Gong, Z.*; et al.
Physical Review B, 95(6), p.060505_1 - 060505_6, 2017/02
被引用回数：23 パーセンタイル：71.49(Materials Science, Multidisciplinary)We use neutron diffraction and muon spin relaxation to study the effect of in-plane uniaxial pressure on the antiferromagnetic (AF) orthorhombic phase in BaFeTAs and its Co- and Ni-substituted members near optimal superconductivity. In the low-temperature AF ordered state, uniaxial pressure necessary to detwin the orthorhombic crystals also increases the magnetic ordered moment, reaching an 11% increase under 40 MPa for BaFe
Co
As
, and a 15% increase for BaFe
Ni
As. We also observe an increase of the AF ordering temperature (
) of about 0.25 K/MPa in all compounds, consistent with density functional theory calculations that reveal better Fermi surface nesting for itinerant electrons under uniaxial pressure. The doping dependence of the magnetic ordered moment is captured by combining dynamical mean field theory with density functional theory, suggesting that the pressure-induced moment increase near optimal superconductivity is closely related to quantum fluctuations and the nearby electronic nematic phase.
徐 平光; Yin, J*; Zhang, S. Y.*
Acta Metallurgica Sinica, 51(11), p.1297 - 1305, 2015/11
The tensile deformation behavior of 1250 MPa ultra-high strength steels with and without hydrogen charging was comparably investigated using neutron diffraction together with the fracture morphology and microstructure observation. Before tensile loading, the (110) lattice spacing of hydrogen charged steel was found larger than that of non-charged sample while the (200) lattice spacing of the former was smaller than that of the latter, suggesting that the hydrogen atoms occupied the tetrahedral center promoted the increment of lattice plane spacing of (110) crystal planes while the balanced internal stress resulted in the proper decrement of (200) lattice plane spacing. In the non-charged sample, the non-linear elastic deformation was observed at 700 MPa in (200) planes, and then at 800 MPa in (110) planes. In the hydrogen charged sample, the non-linear elastic deformation was observed at 300 MPa in (110) planes, and then at 400 MPa in (200) planes. The microstructure observation confirmed the cleavage crack propagation and local crystal rotation in the hydrogen charged sample. Here, a concept about crystallographic orientation dependent micro-yielding was proposed, i.e. the hydrogen charging promoted the (110) preferable micro-yielding rather than (200) preferable micro-yielding, and resulted into a special deformation characteristics.
Scibetta, M.*; Altstadt, E.*; Callejas, R.*; Lee, B.*; 三浦 直樹*; 鬼沢 邦雄; Paffumi, E.*; Serrano, M.*; Tatar, L.*; Yin, S.*
Proceedings of 2009 ASME Pressure Vessels and Piping Division Conference (PVP 2009) (CD-ROM), 11 Pages, 2009/07
国際原子力機関(IAEA)では、軽水型原子炉圧力容器への破壊靱性マスターカーブ法の適用に関する課題解決のため、国際協力研究(CRP)を行っている。このCRPにおける課題1では、マスターカーブ法により予き裂付シャルピー(PCC)試験片から参照温度T0を決定するための課題に着目し、破壊靱性試験及び解析を実施した。ラウンドロビン解析では、き裂先端近傍の応力・ひずみに着目して弾塑性有限要素法解析を用いた。ラウンドロビン解析には、9か国から10機関が参加し、浅いき裂と深いき裂を有する試験片の3次元モデルを作成して解析を行った。解析コードや解析者の相違の影響は比較的小さく、深いき裂と比較した場合、浅いき裂の試験片の方が拘束効果に対する感受性が高いことが示された。また、破壊靱性参照温度の観点では、き裂深さの影響は約40Cとなることが示された。
Zanino, R.*; Bagnasco, M.*; Baker, W.*; Bellina, F.*; Bruzzone, P.*; della Corte, A.*; Ilyin, Y.*; Martovetsky, N.*; Mitchell, N.*; Muzzi, L.*; et al.
IEEE Transactions on Applied Superconductivity, 16(2), p.886 - 889, 2006/06
被引用回数：7 パーセンタイル：40.69(Engineering, Electrical & Electronic)那珂核融合研究所においてITERポロイダル磁場コイル導体インサート(PFCI)の実験が予定されている。このため、PFCIの適切な実験プログラムを作成することを目的として、NbTi短尺導体サンプル実験から得られた結果の解析を行った。特に、次の項目について検討を行った;(1)巻線内の導体ジョイントがクエンチする前に導体自身の分流開始温度Tcsを測定できる可能性に関する検討。(2)解析コードMithrandirを用いて短尺導体サンプルの実験結果を解析し、いわゆる突然の又は早期のクエンチの可能性に関する検討。(3)PFCI実験における熱量法によるACロス測定の可能性。検討の結果、Tcs及びACロスの測定は可能であることがわかった。しかし、突然のクエンチについては今後のこれらの検討が必要である。
