Search Results 1-20 of 58

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  • Temporal variability and flux estimates of helium isotopes in Kagoshima Bay, southern Japan  [in Japanese]

    Teresa Escobar Ma , Takahata Naoto , Shirai Kotaro , Tanaka Kentaro , Kagoshima Takanori , Obata Hajime , Sano Yuji

    <p>ああ</p>

    Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 74, 2019

    J-STAGE 

  • Production of 4He and 4Hein Pb–Pb collisions at √sNN=2.76TeVat the LHC

    ALICE Collaboration , Busch O. , Chujo T. , Miake Y. , Sakai S. , Busch Oliver , 中條 達也 , 三明 康郎 , 坂井 真吾

    … Results on the production of 4He and 4Henuclei in Pb–Pb collisions at √sNN=2.76TeVin the rapidity range |y|<1, using the ALICE detector, are presented in this paper. … The rapidity densities corresponding to 0–10% central events are found to be dN/dy4He=(0.8±0.4(stat)±0.3(syst))×10−6and dN/dy4He=(1.1 ±0.4(stat) ±0.2(syst)) ×10−6, respectively. … The measured ratio of 4He/4Heis 1.4 ±0.8(stat) ±0.5(syst). …

    Nuclear physics. A (971), 1-20, 2017-12

    IR 

  • Noble gas and carbon isotope ratios at Kusatsu-Shirane volcano, Japan  [in Japanese]

    Yamane Kohei , Sumino Hirochika , Naito Daiki , Kato Shota , Shibata Takumi , Zhou Chu―Fan , Yashiki Takanori , Kobayashi Masahiro , Terada Akihiko

    <p>2014年6月以来活動が活発化している草津白根火山において、火山ガスと温泉ガスを採取し、希ガスと炭素の同位体比を分析した。ヘリウム同位体比には活動の活発化と対応した変動は見られなかった。炭素同位体比からは、海成炭酸塩に由来する成分の寄与が最も多いことが示され、火山活動の活発化の前と比べその寄与率はわずかに増加していたが、その原因は現時点では不明である。</p>

    Abstracts of Annual Meeting of the Geochemical Society of Japan 63(0), 219, 2016

    J-STAGE 

  • Mineralogy and noble gas isotopes of micrometeorites collected from Antarctic snow

    Okazaki Ryuji , Noguchi Takaaki , Tsujimoto Shin-ichi , Tobimatsu Yu , Nakamura Tomoki , Ebihara Mitsuru , Itoh Shoichi , Nagahara Hiroko , Tachibana Shogo , Terada Kentaro , Yabuta Hikaru

    … Based on the release patterns of SW 4He, which should reflect the degree of heating during atmospheric entry, the seven MMs were classified into three types including two least heated, three moderately heated, and two severely heated MMs. …

    Earth, Planets and Space (67), 90, 2015-06-17

    IR 

  • Hydrogen traps in ion-irradiated F82H steel observed by NRA

    Takagi Ikuji , Komura Tetsuya , Akiyoshi Masafumi , Moritani Kimikazu , Sasaki Takayuki , Moriyama Hirotake

    … Before and after irradiation of 0.8-MeV 4He or 0.3-MeV H ions, deuterium depth profiles near the surface of a disk sample were observed by nuclear reaction analysis under continuous exposure of deuterium plasma. … The ratio of trap production rate to atomic displacement was 0.0046 and 0.0014 for He and H irradiation, respectively. …

    Journal of Nuclear Materials 442(1-3, Supplement 1), S33-S37, 2013-11

    IR 

  • Construction of a Newly Designed Small-Size Mass Spectrometer for Helium Isotope Analysis : Toward the Continuous Monitoring of ^3He/^4He Ratios in Natural Fluids

    BAJO Ken-ichi , SUMINO Hirochika , TOYODA Michisato , OKAZAKI Ryuji , OSAWA Takahito , ISHIHARA Morio , KATAKUSE Itsuo , NOTSU Kenji , IGARASHI George , NAGAO Keisuke

    … which was determined by measuring various types of natural fluid samples from continental gas (with a low <sup>3</sup>He/<sup>4</sup>He ratio down to 2×10<sup>−8</sup>) to volcanic gas (with a high <sup>3</sup>He/<sup>4</sup>He ratio up to 3×10<sup>−5</sup>). …

    Mass Spectrometry 1, A0009, 2012-12-01

    J-STAGE  References (26)

  • Helium isotopes of seawater in the Philippine Sea and the western North Pacific

    TAKAHATA NAOTO , TOKUKAKE TAICHI , SHIRAI KOTARO , FUJIO SHINZOU , TANAKA KIYOSHI , SANO YUJI

    … The <sup>3</sup>He/<sup>4</sup>He ratios varied significantly from δ<sup>3</sup>He of 0.1% to 22.9%, where δ<sup>3</sup>He is defined as the percent deviation of the helium isotopic ratio relative to the atmospheric standard. …

    GEOCHEMICAL JOURNAL 44(6), 451-460, 2010-12-01

    J-STAGE  References (22) Cited by (1)

  • Noble gas isotope ratios of olivine phenocrysts and mantle-derived xenoliths in Patagonian plateau lavas from southernmost South America

    Sumino Hirochika , Orihashi Yuji , Motoki Akihisa , Hirata Daiji , Haller Miguel , Conceicao Rommulo , Anma Ryo , Nagao Keisuke

    … アルカリ玄武岩マグマの3He/4He比は6~7RA程度で、MORB(8±1 RA)よりも高い3He/4He比で特徴づけられるマントルプルームは関与していないことが明らかになった。 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 57(0), 155-155, 2010

    J-STAGE 

  • Noble gases in two shergottites and one nakhlite from Antarctica: Y000027, Y000097, and Y000593

    Schwenzer S.P. , Herrmanna S. , Ott U.

    … The ^3He/^4He ratio of the shergottites is between 0.189 and 0.217, which indicates almost complete loss of radiogenic ^4He. … The concentration of ^4He in these shergottite samples ranges from 33.8 to 39.4 × 10^<−8> … ccSTP/g 4He and 26 × 10^<−9> …

    Polar science 3(2), 83-99, 2009-09

  • Correlation between dissolved ^4He concentration and ^<36>Cl in groundwater at Aspo, Sweden

    Mahara Yasunori , Hasegawa Takuma , Miyakawa Kimio , Ohta Tomoko

    … A correlation has been observed between dissolved 4He concentration and Cl− ion concentration, measured every two years from 1995 to 2001 at Äspö. … Subsurface production is responsible for the majority of the 36Cl and excess dissolved 4He of interstitial groundwater in fractures. …

    Applied Geochemistry 23(12), 3305-3320, 2008-12

    IR  Cited by (1)

  • New Aspects of Crystal Growth of Solid ^4He Studied by Acoustic Wave

    OKUDA Yuichi , NOMURA Ryuji

    … The new aspects of crystal growth in solid ^4He at low temperatures are revealed by manipulating the crystal with a radiation pressure of acoustic waves. … The acoustic radiation pressure is generally a tiny nonlinear effect, but it has given unexpected effect on the surface of ^4He owing to the markedly high growth rate of the crystal. …

    Journal of the Physical Society of Japan 77(11), "111009-1"-"111009-10", 2008-11-15

    References (47)

  • Argon isotope ratio of the plume-source deduced from high-resolution stepwise crushing extraction

    MATSUMOTO TAKUYA , ORIHASHI YUJI , MATSUDA JUN-ICHI , YAMAMOTO KOSHI

    Geochemical Journal 42(1), 39-49, 2008-02-01

    References (51)

  • On the change of 3He/4He ratio in the hot spring gas after the Iwate-Miyagi Nairiku Earthquke in 2008

    Horiguchi Keika , Matsuda Jun-ichi

    2008年6月14日に発生した岩手・宮城内陸地震は(M7.2),この低いヘリウム同位体の地域において発生した.そこで,地震直後のヘリウム同位体がどのように変化するかを調べるため,7月21?22日に9ヶ所で温泉ガス・水のサンプリングを行い,ヘリウム・ネオンの存在比とヘリウム同位体比を測定した.地震による変化をみるためにHoriguchi et al. (2007)により測定された同じ源泉にて,でき …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 55(0), 37-37, 2008

    J-STAGE 

  • Anomalous He concentration and the 3He/4He ratio found in fumarolic gases at Tatun volcanic area in Taiwan

    Ohba Takeshi , Sawa Takeshi , Taira Noriyasu , Yang T.F. , Lee H.F. , Lan T.F. , Ohwada Michiko , Morikawa Noritoshi , Kazahaya Kohei

    … 台湾大屯山で採取した噴気に含まれるHeの濃度と3He/4He比が異常に低い現象が発見された.この異常は,単なる空気の混入では説明できない.火山ガスが地表付近の不飽和帯を通過する際に,希ガスに乏しい水蒸気と接触し,Heが拡散的に失われると考えることにより,観測された異常は説明できる.一般に,Heは希ガスのために,地下深部から上昇する過程で,混合以外の原因では変化を受けないと考えられてきたが, …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 55(0), 198-198, 2008

    J-STAGE 

  • On the change of 3He/4He ratios in hot spring gases after The Iwate-Miyagi Nairiku Earthquake in 2008

    HORIGUCHI KEIKA , MATSUDA JUN-ICHI

    … We collected water and gas samples in hot springs from seven localities around the epicenter of the earthquake on June 21st and 22nd, one week after the earthquake, and measured the <sup>3</sup>He/<sup>4</sup>He ratio and He and Ne concentrations of the dissolved gases. …

    GEOCHEMICAL JOURNAL 42(6), e1-e4, 2008

    J-STAGE 

  • Gas compositions and helium isotopic ratios of fluid samples around Kueishantao, NE offshore Taiwan and its tectonic implications

    YANG TSANYAO FRANK , LAN TEFANG FAITH , LEE HSIAO-FEN , FU CHING-CHOU , CHUANG PEI-CHUAN , LO CHING-HUA , CHEN CHENG-HONG , CHEN CHEN-TUNG ARTHUR , LEE CHAO-SHING

    … is the <SUP>3</SUP>He/<SUP>4</SUP>He ratio of air), probably the highest <SUP>3</SUP>He/<SUP>4</SUP>He values of gases ever reported in active hydrothermal areas of the western Pacific region. …

    GEOCHEMICAL JOURNAL 39(5), 469-480, 2005-10-01

    J-STAGE  References (54) Cited by (2)

  • Noble gas compositions of the mantle-derived xenoliths from Cenozoic volcanic area in Northeastern China

    Sun Jinggui , Shimizu Aya , Sumino Hirochika , Nagao Keisuke , Junqiang Chen , Junking Zhao

    … The 3He/4He ratios within each volcanic province are various with ranges of 12.52-15.78Ra, 3.06-9.10Ra, 6.08-9.18Ra, 7.14-7.71, and 5.87-6.00Ra times the atmospheric ratio (Ra), respectively. … the lager variations of 3He/4He ratios shown that the geochemical and isotopic in this SCLM is very heterogeneity, with integrate to the Ne and Ar isotopic components. …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 52(0), 261-261, 2005

    J-STAGE 

  • Helium isotopes of seawater in adjacent sea of Nansei Islands, Southwest Japan

    Takahata Naoto , Watanabe Tsuyoshi , Shirai Kotaro , Nishizawa Manabu , Sano Yuji

    Geochemical journal 38(6), 593-600, 2004-12-01

  • Helium isotopes of seawater in adjacent sea of Nansei Islands, Southwest Japan

    TAKAHATA NAOTO , WATANABE TSUYOSHI , SHIRAI KOTARO , NISHIZAWA MANABU , SANO YUJI

    Geochemical Journal 38(6), 593-600, 2004-12-01

    References (26) Cited by (4)

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