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Observation of a $$Xi$$ bound state in the $$^{12}$$C$$(K^-, K^+)$$ reaction at 1.8 GeV/$$c$$

永江 知文*; 江川 弘行; 長谷川 勝一; 早川 修平; 細見 健二; 市川 裕大; 今井 憲一; 金原 慎二; 七村 拓野*; 成木 恵; et al.

AIP Conference Proceedings 2130, p.020015_1 - 020015_9, 2019/07

For the full understanding of baryon-baryon interactions in flavor $$SU(3)$$, the $$Xi N$$ interaction is the last missing piece of information. So far, we have revealed the $$Lambda N$$ interaction to be attractive ($$U_{Lambda} cong 30$$ MeV), and $$Sigma N$$ interaction to be repulsive in the medium to heavy mass-number region. The $$Lambda Lambda$$ bonding energy is weakly attractive. While we have a few experimental observations suggesting the $$Xi N$$ interaction would be attractive, there still exist large theoretical ambiguities weather it is attractive or not. Experimental determinations on the existence of bound states of $$Xi$$ hypernuclei by observing bound-state peaks are strongly awaited. In this report, a new preliminary result on the missing-mass spectrum of a $$^{12}$$C$$(K^-, K^+)$$ reaction, which strongly suggests the existence of $$Xi$$-hypernuclear bound states, is presented.


Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment

江川 弘行; 足利 沙希子; 長谷川 勝一; 橋本 直; 早川 修平; 細見 健二; 市川 裕大; 今井 憲一; 金原 慎二*; 七村 拓野; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D02_1 - 021D02_11, 2019/02

 被引用回数:13 パーセンタイル:85.21(Physics, Multidisciplinary)

A double-$$Lambda$$ hypernucleus, $${}_{LambdaLambda}mathrm{Be}$$, was observed by the J-PARC E07 collaborationin nuclear emulsions tagged by the $$(K^{-},K^{+})$$ reaction. This event was interpreted as a production and decay of $$ {}_{LambdaLambda}^{;10}mathrm{Be}$$,$${}_{LambdaLambda}^{;11}mathrm{Be}$$, or $${}_{LambdaLambda}^{;12}mathrm{Be}^{*}$$ via $$Xi^{-}$$ capture in $${}^{16}mathrm{O}$$.By assuming the capture in the atomic 3D state, the binding energy of two $$Lambda$$ hyperons$$,$$($$B_{LambdaLambda}$$)of these double-$$Lambda$$ hypernuclei are obtained to be$$15.05 pm 0.11,mathrm{MeV}$$, $$19.07 pm 0.11,mathrm{MeV}$$, and $$13.68 pm 0.11,mathrm{MeV}$$, respectively. Based on the kinematic fitting, $${}_{LambdaLambda}^{;11}mathrm{Be}$$ is the most likely explanation for the observed event.


Observation of spin-dependent charge symmetry breaking in $$Lambda N$$ interaction; $$gamma$$-ray spectroscopy of $$^4_{Lambda}$$He

山本 剛史*; 長谷川 勝一; 早川 修平; 細見 健二; Hwang, S.; 市川 裕大; 今井 憲一; 金原 慎二; 中田 祥之; 佐甲 博之; et al.

Physical Review Letters, 115(22), p.222501_1 - 222501_5, 2015/11


 被引用回数:54 パーセンタイル:92.84(Physics, Multidisciplinary)

The energy spacing between the spin-doublet bound state of $$^4_{Lambda}$$He$$(1^+,0^+)$$ was determined to be $$1406 pm 2 pm 2$$ keV, by measuring $$gamma$$ rays for the $$1^+ to 0^+$$ transition with a high efficiency germanium detector array in coincidence with the $$^4{rm He}(K^-,pi^-)^4_{Lambda}$$He reaction at J-PARC. In comparison to the corresponding energy spacing in the mirror hypernucleus $$^4_{Lambda}$$H, the present result clearly indicates the existence of charge symmetry breaking (CSB) in $$Lambda N$$ interaction. By combining the energy spacings with the known ground-state binding energies, it is also found that the CSB effect is large in the $$0^+$$ ground state but is vanishingly small in the $$1^+$$ excited state, demonstrating that the $$Lambda N$$ CSB interaction has spin dependence.


Thermal expansion of a Au-Al-Yb intermediate valence quasicrystal

綿貫 徹; 柏本 史郎*; 石政 勉*; 町田 晃彦; 山本 真*; 田中 幸範*; 水牧 仁一朗*; 河村 直己*; 渡辺 真仁*

Solid State Communications, 211, p.19 - 22, 2015/06

 被引用回数:5 パーセンタイル:28.49(Physics, Condensed Matter)



Thermal stability of butt joint for CS conductor in JT-60SA

高尾 智明*; 川原 譲*; 中村 一也*; 山本 侑祐*; 谷貝 剛*; 村上 陽之; 吉田 清; 夏目 恭平*; 濱口 真司*; 尾花 哲浩*; et al.

IEEE Transactions on Applied Superconductivity, 24(3), p.4800804_1 - 4800804_4, 2014/06

 被引用回数:3 パーセンタイル:24.77(Engineering, Electrical & Electronic)

JT-60SAの中心ソレノイド(CS)は、6つの8層パンケーキコイルと1つの4層パンケーキコイルから構成される。パンケーキコイル間の接続は、プラズマへ供給する磁束を大きくするために、省スペースで設置が可能なITER-EDAのCSモデルコイルで開発された突合せ接続により行われる。本研究ではCS用突合せ接続サンプルを用いて、通電電流値,超臨界圧ヘリウム(SHe)流量, SHe圧力,外部磁場を変化させクエンチ温度(Tq)を測定した。また有限要素法(FEM)解析ソフトCOMSOL Multiphysicsを用いてCS突合せ接続内の温度上昇及び温度分布の数値計算を実施した。これらの試験と解析の結果、CS突合せ接続部はSHe流量が減少しても安定に運転できることがわかった。本論文では、Tq測定試験やFEM解析モデル及びCS接続部のTqとSHe流量の評価結果について報告する。


Analysis and numerical simulation of seismic events recorded in the ventilation shaft at the Mizunami URL

新美 勝之*; 小林 伸司*; 延藤 遵*; 松井 裕哉; 山本 勝

Proceedings of European Rock Mechanics Symposium (EUROCK 2012) (CD-ROM), 13 Pages, 2012/05



Predicting cetuximab accumulation in ${it KRAS}$ wild-type and ${it KRAS}$ mutant colorectal cancer using $$^{64}$$Cu-labeled cetuximab positron emission tomography

Achmad, A.*; 花岡 宏史*; 吉岡 弘樹*; 山元 進司*; 富永 英之*; 荒木 拓也*; 大島 康宏; 織内 昇*; 遠藤 啓吾*

Cancer Science, 103(3), p.600 - 605, 2012/03

 被引用回数:20 パーセンタイル:53.71(Oncology)

Overexpression of epidermal growth factor receptor (EGFR) is common in colorectal cancer. However, cetuximab, an EGFR-targeting drug, is useful only for a subset of patients and no single predictor other than V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (${it KRAS}$) mutation status has been established. In this study, we investigated cetuximab accumulation in colorectal tumors using $$^{111}$$In-DOTA-cetuximab, and evaluated the potential of positron emission tomography (PET) imaging of $$^{64}$$Cu-DOTA-cetuximab. We found that ${it KRAS}$ wild-type tumors had significantly higher $$^{111}$$In-DOTA-cetuximab accumulation than ${it KRAS}$ mutant tumors. Based on ${it KRAS}$ mutation status, a strong correlation was found between $$^{111}$$In-DOTA-cetuximab tumor uptake and EGFR expression level. Significant correlation was also found between tumor uptake of $$^{111}$$In-DOTA-cetuximab and $$^{64}$$Cu-DOTA-cetuximab. PET imaging with $$^{64}$$Cu-DOTA-cetuximab effectively visualized cetuximab accumulation in colorectal tumors with a wide variety of EGFR expression levels and different ${it KRAS}$ mutation status as commonly encountered in the clinical setting. Our findings suggest that this radioimmunoimaging can be clinically translated as an in vivo tool to predict cetuximab accumulation in colorectal cancer patients prior to cetuximab therapy.


Accumulation of radiation damage and disordering in MgAl$$_{2}$$O$$_{4}$$ under swift heavy ion irradiation

安田 和弘*; 山本 知一*; 江藤 基稀*; 川副 慎治*; 松村 晶*; 石川 法人

International Journal of Materials Research, 102(9), p.1082 - 1088, 2011/09

 被引用回数:9 パーセンタイル:51.86(Metallurgy & Metallurgical Engineering)



超深地層研究所計画 年度報告書(2009年度)

國丸 貴紀; 見掛 信一郎; 西尾 和久; 鶴田 忠彦; 松岡 稔幸; 早野 明; 竹内 竜史; 三枝 博光; 大山 卓也; 水野 崇; et al.

JAEA-Review 2011-007, 145 Pages, 2011/03





石井 洋司; 渡辺 和彦; 神谷 晃; 早野 明; 見掛 信一郎; 竹内 真司; 池田 幸喜; 山本 勝; 杉原 弘造

JAEA-Technology 2010-044, 92 Pages, 2011/02





天澤 弘也; 坂井 章浩; 坂本 義昭; 仲田 久和; 山本 正幸*; 河田 陽介*; 木原 伸二

JAEA-Technology 2010-043, 153 Pages, 2011/01




Ion irradiation effects on the optical properties of tungsten oxide films

永田 晋二*; 藤田 遥*; 井上 愛知; 山本 春也; 土屋 文*; 四竈 樹男*

Nuclear Instruments and Methods in Physics Research B, 268(19), p.3151 - 3154, 2010/10

 被引用回数:3 パーセンタイル:30.42(Instruments & Instrumentation)



Reverse Monte Carlo simulation approach on the amorphous structure of C$$_{59}$$N

Ferdows, M.; 鈴谷 賢太郎; 川北 至信; 小原 真司*; 樹神 克明; 山本 和典; 社本 真一; 平田 孝道*; 表 研次*; 笠間 泰彦*; et al.

Abstracts of 7th International Symposium on Advanced Materials in Asia-Pacific (NT 2010)/JAIST International Symposium on Nano Technology 2010 (7th ISAMAP), p.25 - 28, 2010/09




見掛 信一郎; 山本 勝; 池田 幸喜; 杉原 弘造; 竹内 真司; 早野 明; 佐藤 稔紀; 武田 信一; 石井 洋司; 石田 英明; et al.

JAEA-Technology 2010-026, 146 Pages, 2010/08




超深地層研究所計画 年度計画書(2010年度)

竹内 真司; 國丸 貴紀; 見掛 信一郎; 西尾 和久; 鶴田 忠彦; 松岡 稔幸; 早野 明; 竹内 竜史; 三枝 博光; 大山 卓也; et al.

JAEA-Review 2010-029, 28 Pages, 2010/08




超深地層研究所計画 年度報告書(2008年度)

竹内 真司; 國丸 貴紀; 見掛 信一郎; 西尾 和久; 鶴田 忠彦; 松岡 稔幸; 早野 明; 竹内 竜史; 三枝 博光; 大山 卓也; et al.

JAEA-Review 2010-014, 110 Pages, 2010/07




Production of radioisotopes for nuclear medicine using ion-beam technology and its utilization for both therapeutic and diagnostic application in cancer

飯田 靖彦*; 花岡 宏史*; 渡辺 智; 渡邉 茂樹; 石岡 典子; 吉岡 弘樹*; 山元 進司*; Paudyal, P.*; Paudyal, B.*; 樋口 哲也*; et al.

JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 108, 2009/12

As antibody binds specifically to corresponding antigens, radiolabeled antibody also binds to cells expressing antigens on surface membranes. Large amounts of antibodies labeled with cytotoxic radionuclides are administered intravenously in cancer patients, after diagnostic imaging using the tracer amount of radiolabeled antibody. In this study, we developed this therapy, called radioimmunotherapy, for effective treatment in cancer patients without damaging normal cells which do not express antigens. We developed $$^{177}$$Lu-DOTA-NuB2 using carrier-free $$^{177}$$Lu, and obtained remarkable results for decreasing tumor. Tumor specific radionuclide therapy using $$^{177}$$Lu is effective therapy with less adverse reactions.


Application of X-ray photoelectron spectroscopy to characterization of Au nanoparticles formed by ion implantation into SiO$$_{2}$$

高廣 克己*; 大泉 信之助*; 森本 圭一*; 川面 澄*; 一色 俊之*; 西尾 弘司*; 永田 晋二*; 山本 春也; 鳴海 一雅; 楢本 洋*

Applied Surface Science, 256(4), p.1061 - 1064, 2009/11

 被引用回数:8 パーセンタイル:35.36(Chemistry, Physical)

In X-ray photoelectron spectroscopy (XPS) of Au nanoparticles, the width of 5d valence band changes with Au particle size. This enables us to estimate the size of Au nanoparticles by using XPS. In this work, the 5d-band width has been measured for Au nanoparticles formed by ion implantation into SiO$$_{2}$$. The 5d-band width is found to be correlated strongly with the Au concentration. As the Au concentration increases, the 5d-band width becomes larger, indicating that the Au nanoparticles with the larger size tend to be formed in the vicinity of the projected range of Au ions. This correlation agrees very well with the results from transmission electron microscopy.


Ion-induced self-organized ripple patterns on graphite and diamond surfaces

高廣 克己*; 尾崎 孝一*; 川面 澄*; 永田 晋二*; 山本 春也; 鳴海 一雅; 楢本 洋*

Applied Surface Science, 256(4), p.972 - 975, 2009/11

 被引用回数:10 パーセンタイル:44.86(Chemistry, Physical)

In order to investigate the allotropic effect on ripple pattern formation, highly oriented pyrolytic graphite (HOPG) and single crystalline diamond were irradiated with 10-200 keV Xe$$^{+}$$ at an incident angle of 60$$^{circ}$$ with respective to the surface normal. The irradiation fluence was 2 $$times$$ 10$$^{17}$$ cm$$^{-2}$$ for all irradiations. Ripple patterns were observed on both HOPG and diamond surfaces. However, large differences in ripple wavelengths, amplitudes and surface roughnesses between HOPG and diamond were recognized. The reason for these differences is discussed.


青森研究開発センターむつ事務所施設管理課業務報告; 平成20年度

長根 悟; 松野 悟; 山本 誠; 飛内 万史; 尾崎 真司; 佐藤 泰雄; 北原 勝美; 吉川 静次

JAEA-Review 2009-018, 39 Pages, 2009/08



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