Search Results 1-20 of 256

  • Status and Applications of a Tandetron AMS System at Nagoya University in 2017  [in Japanese]

    中村 俊夫 , 南 雅代 , 増田 公明 , 小田 寛貴 , 池田 晃子 , 栗田 直幸 , 山根 雅子 , 西田 真砂美 , 藤沢 純平 , 方 雨婷 , 徳丸 誠 , 木田 梨沙子 , 酢屋 徳啓 , 北川 浩之 , Nakamura Toshio , Minami Masayo , Masuda Kimiaki , Oda Hirotaka , Ikeda Akiko , Kurita Naoyuki , Yamane Masako , Nishida Masami , Fujisawa Junpei , Fang Yuting , Tokumaru Makoto , Kida Risako , Suya Tokunori , Kitagawa Hiroyuki

    … Acceptance tests of its performance on carbon-isotope-ratio measurements were completed in January of 1999, and routine measurements began in mid-2000. … (4) During the usual measurement of a graphite target, 12C3+, 13C3+ and 14C3+ decreased gradually in the last half of its measurement time of 30 minutes. …

    名古屋大学年代測定研究 2, 79-87, 2018-03-31

    IR DOI

  • Study of Sr Ionization Mechanism and Microscopic Behavior of Ta-Activator in Thermal Ionization Mass Spectrometric Isotope-Ratio Measurement  [in Japanese]

    Shimode Ryoya , Miyazaki Takashi , Wakaki Shigeyuki , Suzuki Katz , Takagai Yoshitaka

    <p>表面電離型質量分析計(TIMS)では,Sr同位体比を非常に精度良く測定することができ,その同位体比によって年代同定や環境動態など多くの有益な情報がもたらされる。TIMSによるSr分析では,フィラメントにSrを含む試料溶液のほかに,Taアクチベーター(Ta-Act.)溶液を塗布して測定を行うことが一般的である。Ta-Act.は,TIMS測定において,Srイオンを一定の強度で持続的( …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 65(0), 290, 2018

    J-STAGE

  • Measurement of sulfur isotopic ratio of carbonyl sulfide using large volume air concentration system  [in Japanese]

    Kamezaki Kazuki , Hattori Shohei , Bahlmann Enno , Yoshida Naohiro

    <p>本研究では塩化メタンなどの大気中の微量化合物の捕集法に着目することで、大気を5 L/minと高い流速で吸引し、液体窒素を寒剤として用いて安定な温度条件下でのOCS濃縮・捕集法を開発した。発表では開発した捕集装置によるOCSの捕集効率、OCS硫黄同位体組成の量依存性の確認、硫黄粉末より合成したOCSを開発した装置に導入した結果と従来の方法で測定した結果を比較して同位体分別の有無を報 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 65(0), 216, 2018

    J-STAGE

  • Examination of hydrogen oxygen stable isotope ratio measurement of the salt tomato extract in the optical stable isotope ratio measurement device  [in Japanese]

    Ichikawa Junko , Sato Rie

    <p>食品のブランド化が進む中、他の地域との差別化を図る取り組みが活発化しており、塩トマトがその一つと挙げられる。塩トマトは塩分濃度が高い土壌で栽培される特別栽培のトマトである。土壌が海水の影響を受け、且つ水分ストレスを与える生産方法の塩トマトと通常栽培のトマトでは、抽出液に相違や特徴が見られる可能性がある。安定同位体比は、生育環境や栽培方法の違いを反映し、変動する。抽出液の水素・酸素 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 65(0), 279, 2018

    J-STAGE

  • Observation of the Spatial Profile of Deuterium/Hydrogen Ratio Using Bulk Charge Exchange Emission

    YAMASAKI Kotaro , IDA Katsumi , YOSHINUMA Mikirou , KOBAYASHI Tatsuya

    … <p>Spatial profile of deuterium/hydrogen (D/H) ratio is observed using the charge exchange emission of bulk deuterium/hydrogen ion and neutral beam perpendicularly injected into the torus plasma. … The initial result observed in Large Helical Device (LHD) plasma indicates that D/H ratio is constant in radial direction and is the same as that observed from passive spectroscopic measurement when the tangential NBI or the pellet injection are absent.</p> …

    Plasma and Fusion Research 13(0), 1202103-1202103, 2018

    J-STAGE

  • Origin of Sulfate Ion in Precipitation of Chugoku District Estimated by Sulfur and Oxygen Isotope Ratios  [in Japanese]

    Chiba Hitoshi , Fujiike Tatsuya , Mao Huixing

    <p>中国地方の6地点における月毎の降水中の硫酸イオンの酸素同位体比と硫黄同位体比の測定を行った。非海塩性硫酸の酸素と硫黄同位体比から,硫酸イオンは,季節により三つのグループに分かれる。冬期の中国の石炭燃焼に影響を受けている高い硫黄同位体比の硫酸のグループA,夏期の主に国内の石油燃焼の影響を受けている低い硫黄同位体比の硫酸のグループB,春先のグループAとBの中間的な硫黄同位体比の値を持 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 64(0), 281, 2017

    J-STAGE

  • Studies on Isotope Ratio Measurement of Cl by Inductively Coupled Plasma Triple-quad Mass Spectrometry

    OHATA Masaki , ZHU Yanbei , NONOSE Naoko

    … Fundamental studies on isotope ratio measurement of Cl were carried out using inductively coupled plasma triple-quad mass spectrometry (ICP-MS/MS) and the analytical performance obtained was compared to that obtained by ICP sector field mass spectrometer (ICP-SFMS). …

    Analytical Sciences 33(3), 375-380, 2017

    J-STAGE

  • Brief Outline of 28th Symposium on Age Measurement and Applications at ISEE in 2015  [in Japanese]

    中村 俊夫 , NAKAMURA Toshio

    … Symposium of this kind has been held every year generally as an opportunity for users' meeting to publicize their results obtained by utilizing the age-measurement facilities of the Division of Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University. … She successfully found the graphite and brought it to Japan, and investigated its origin by an optical microscope, an electric microscope and carbon isotope ratio analysis. …

    名古屋大学加速器質量分析計業績報告書 27, 3-10, 2016-03

    IR DOI

  • Temporal and vertical distributions of anthropogenic 236U in the Japan Sea using a coral core and seawater samples

    Sakaguchi Aya , Nomura Tomoya , Steier Peter , Golser Robin , Sasaki Keiichi , Watanabe Tsuyoshi , Nakakuki Tomoeki , Takahashi Yoshio , Yamano Hiroya

    … The input history of 236U to the surface water of the Japan Sea was reconstructed through measurement of the 236U/238U atom ratio in annual bands of a coral skeleton which was collected at Iki Island in the Tsushima Strait, the main entrance to the Japan Sea. … thereafter the isotope ratios gradually decreased over the next several decades, attaining a value of ca.1.3 × 10−9 for the present day. …

    Journal of geophysical research: Oceans 121(1), 4-13, 2016-01

    IR

  • Determining the Ratio of Two Types of Prostate Specific Antigens with Biochips and Gold Nanoparticles for Accurate Prostate Cancer Diagnosis

    YOO Minyoung , YEO Woon-Seok

    … However, the serum PSA measurement alone is insufficient for accurate diagnoses because the correlation with cancer is weak within the gray zone—the biomarker level range wherein a clear-cut diagnosis is impossible. … As such, accurate prostate cancer diagnosis has been supplemented by measurements of the ratio of two types of PSA: free PSA (fPSA) and complexed PSA (cPSA; …

    Analytical Sciences 32(10), 1117-1121, 2016

    J-STAGE Ichushi Web

  • Chemical characterization of a chromitite reference sample GPt-5 using INAA and ICP-MS

    Akhter Rabeya , Shirai Naoki , Ebihara Mitsuru

    … By using isotope dilution inductively-coupled plasma mass spectrometry (ICP-MS) coupled with NiS fire-assay pre-concentration, the concentrations of the platinum group elements (PGE; … It was possible to determine the abundance of Ir using both the INAA and ICP-MS, and the values obtained were consistent with each other within the measurement precision. … Based on the Ru/Rh ratio, the GPt-5 chromitite reference sample was classified as a podiform chromitite. …

    GEOCHEMICAL JOURNAL 50(2), 179-185, 2016

    J-STAGE

  • Annual Report April 1, 2015 - March 31, 2016

    … ACCELERATOR MASS SPECTROMETRY3.1 Detection tests of rare particles by the 6 MV tandem accelerator mass spectrometry system3.2 41Ca-AMS measurement in UTTAC AMS system3.3 Environmental impact of the Fukushima accident on iodine-129 levels in rainwater3.4 Decrease of iodine isotopic ratio observed in the crater lake and the geothermal area at Zao volcano4. …

    University of Tsukuba Tandem Accelerator Complex (UTTAC) Annual Report (2015), 2016

    IR

  • Project 11 Studies on Actinides and Fission Products Performed at the KURRI Hot Laboratory

    Fujii T.

    PR11-11 Precipitation Behavior of Trivalent Dysprosium Ion by Reaction with Oxide Ion in CaCl2–LiCl Molten Salt. Sekimoto H. Uehara A. Fujii T. Yamana H.PR11-17 Ar–Ar Age Determination of Minamitorish …

    KURRI Progress Report 2014(APRIL 2014 – MARCH 2015), 52-69, 2015-07

    IR

  • Evaluation of a new sector-field ICP-MS with Jet Interface for ultra-trace determination of Pu isotopes:

    鄭 建

    … In order to enhance the sensitivity for Pu isotope analysis, high efficiency sample introduction systems (APEX-Q and Aridus II) were combined with the Element XR. … A certified Pu isotope standard solution (NBS 947) and a multi element standard solution (Merck Multi Element Standard), which contained depleted U, were used to investigate four items: the formation rate of 238UH+, which could interfere with an ultra-trace level 239Pu determination; …

    Journal of Nuclear and Radiochemical Sciences 15(1), 7-13, 2015-06

    IR

  • Preparation method of barium sulfate from mercuric sulfide for sulfur isotope ratio measurement

    Kawano Maya , Tsutsui Akiho , Minami Takeshi

    … [Abstract]The sulfur isotope ratio in mercuric sulfide called vermilion has been measured for identification of the original mines of vermilion used in ancient burial mounds and antiquities. … Barium sulfate is prepared from vermilion for measurement of the sulfur isotope ratio. … The aim of the present study was to establish a method of sulfur isotope analysis sampling that does not includemercury. …

    Science and technology = 理工学総合研究所研究報告 (27), 49-54, 2015-02

    IR

  • Examination and preparation of laboratory working standard for oxygen and hydrogen stable isotope ratio measurement using world mineral water  [in Japanese]

    李 盛源

    地球環境研究 = Bulletin of geo-environmental science (17), 63-69, 2015

  • Evaluation of a new sector-field ICP-MS with Jet Interface for ultra-trace determination of Pu isotopes: from femtogram to attogram levels

    Zheng J.

    … In order to enhance the sensitivity for Pu isotope analysis, high efficiency sample introduction systems (APEX-Q and Aridus II) were combined with the Element XR. … A certified Pu isotope standard solution (NBS 947) and a multi element standard solution (Merck Multi Element Standard), which contained depleted U, were used to investigate four items: the formation rate of 238UH+, which could interfere with an ultra-trace level 239Pu determination; …

    Journal of Nuclear and Radiochemical Sciences 15(1), 1_7-1_13, 2015

    IR J-STAGE

  • Comparison of 265 nm Femtosecond and 213 nm Nanosecond Laser Ablation Inductively Coupled Plasma Mass Spectrometry for Pb Isotope Ratio Measurements

    OHATA Masaki , NONOSE Naoko , DORTA Ladina , GÜNTHER Detlef

    … The analytical performance of 265 nm femtosecond laser ablation (fs-LA) and 213 nm nanosecond laser ablation (ns-LA) systems coupled with multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) for Pb isotope ratio measurements of solder were compared. …

    Analytical Sciences 31(12), 1309-1315, 2015

    J-STAGE

  • Establishment of tree-ring oxygen isotope chronology using the northern Japanese trees  [in Japanese]

    箱﨑 真隆 , 中村 俊夫 , 木村 勝彦 , 中塚 武 , Hakozaki Masataka , Nakamura Toshio , Kimura Katsuhiko , Nakatsuka Takeshi

    … Establishment and extension of the tree-ring oxygen isotope chronology enable high-precision age determination of various archeological wooden materials and natural buried trees, and contributing to enhancement of past civilization and environmental understanding is expected. …

    名古屋大学加速器質量分析計業績報告書 25, 54-61, 2014-03

    IR DOI

  • PROPOSAL OF MEASUREMENT METHOD FOR EVAPORATION RATE FOR SURFACE WATER USING OXYGEN ISOTOPE IN DRY AREA  [in Japanese]

    宮原 啓 , 井伊 博行 , DAHLHAUS Peter

    水工学論文集 土木学会水工学委員会 編 58, 1603-1608, 2014

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