{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282681470559232.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5702/massspec.49.61"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DC%2BD3MXks1CitL8%3D"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"5748263"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/5748263"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I5748263"}},{"identifier":{"@type":"URI","@value":"http://www.jstage.jst.go.jp/article/massspec/49/2/49_2_61/_pdf"}},{"identifier":{"@type":"NAID","@value":"10010849438"}}],"dc:title":[{"@language":"en","@value":"Highly Sensitive and Precise Measurement of Helium Isotopes Using a Mass Spectrometer with Double Collector System."}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"A noble gas mass spectrometer equipped with a double collector system for helium isotopes was improved for the purpose of determining noble gas isotopic composition with extremely low concentration in terrestrial rock samples. Ion beams of <sup>3</sup>He and <sup>4</sup>He are measured at the same time with a Faraday cup and an ion-counting for <sup>4</sup>He and <sup>3</sup>He, respectively. As a result of changing detector to an ion-counting system and modification of a computer program for analysis, we can analyze the helium isotopic ratio (<sup>3</sup>He/<sup>4</sup>He) with a precision of ±10%, when partial pressure of <sup>3</sup>He is in the range of 0.5-5×10<sup>-14</sup> Torr (corresponds to 0.2-2×10<sup>-13</sup> cm<sup>3</sup> STP). The detection limit was highly improved to <I>ca.</I> 6×10<sup>-16</sup> cm<sup>3</sup> STP of helium as a counting rate of 0.04 cps, which was 1-2 orders of magnitude lower than that before modification: 4×10<sup>-14</sup> cm<sup>3</sup> STP. The diminution of detection limit enables us to measure other noble gas isotopes whose abundances are generally low in rock samples, such as neon, krypton and xenon with the mass spectrometer specialized to helium. In order to use HESJ (Helium Standard of Japan) as a working standard for helium isotopic measurement, we determined its <sup>3</sup>He/<sup>4</sup>He ratio as 20.77±0.24 times the atmospheric ratio (=1.40×10<sup>-6</sup>). In addition, accuracy in helium isotopic ratio measurement with the modified mass spectrometer was checked by comparing them with results obtained by other mass spectrometers in our laboratory."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801213725824","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"90332593"},{"@type":"NRID","@value":"1000090332593"},{"@type":"NRID","@value":"9000019055149"},{"@type":"NRID","@value":"9000376940951"},{"@type":"NRID","@value":"9000345296016"},{"@type":"NRID","@value":"9000400158705"},{"@type":"NRID","@value":"9000258408997"},{"@type":"NRID","@value":"9000258408635"},{"@type":"NRID","@value":"9000019219883"},{"@type":"NRID","@value":"9000001317005"},{"@type":"NRID","@value":"9000257916466"},{"@type":"NRID","@value":"9000397819892"},{"@type":"NRID","@value":"9000019055131"},{"@type":"NRID","@value":"9000345296265"},{"@type":"NRID","@value":"9000240185868"},{"@type":"NRID","@value":"9000347226582"},{"@type":"NRID","@value":"9000398988378"},{"@type":"NRID","@value":"9000402478053"},{"@type":"NRID","@value":"9000258412169"},{"@type":"NRID","@value":"9000258406891"},{"@type":"NRID","@value":"9000283903996"},{"@type":"NRID","@value":"9000400160790"},{"@type":"NRID","@value":"9000258403343"},{"@type":"NRID","@value":"9000258406710"},{"@type":"NRID","@value":"9000345250409"},{"@type":"NRID","@value":"9000000992887"},{"@type":"NRID","@value":"9000347226910"},{"@type":"NRID","@value":"9000347227102"},{"@type":"NRID","@value":"9000347187646"},{"@type":"NRID","@value":"9000405523764"},{"@type":"NRID","@value":"9000257916802"},{"@type":"NRID","@value":"9000258406881"},{"@type":"NRID","@value":"9000259324085"},{"@type":"NRID","@value":"9000370282045"},{"@type":"NRID","@value":"9000258408457"},{"@type":"NRID","@value":"9000347226610"},{"@type":"NRID","@value":"9000396138440"},{"@type":"NRID","@value":"9000403550679"},{"@type":"NRID","@value":"9000240540335"},{"@type":"NRID","@value":"9000370281602"},{"@type":"NRID","@value":"9000283908032"},{"@type":"NRID","@value":"9000283903980"},{"@type":"NRID","@value":"9000258407446"},{"@type":"NRID","@value":"9000258407512"},{"@type":"NRID","@value":"9000386336906"},{"@type":"NRID","@value":"9000347188563"},{"@type":"NRID","@value":"9000414744802"},{"@type":"NRID","@value":"9000392140332"},{"@type":"NRID","@value":"9000402467648"},{"@type":"NRID","@value":"9000415352709"},{"@type":"NRID","@value":"9000388454401"},{"@type":"NRID","@value":"9000370281382"},{"@type":"NRID","@value":"9000347188687"},{"@type":"NRID","@value":"9000345296084"},{"@type":"NRID","@value":"9000314803966"},{"@type":"NRID","@value":"9000386336624"},{"@type":"NRID","@value":"9000370281992"},{"@type":"NRID","@value":"9000398987746"},{"@type":"NRID","@value":"9000258407021"},{"@type":"NRID","@value":"9000258406479"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0057139"}],"foaf:name":[{"@language":"en","@value":"SUMINO 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Keisuke"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681470559234","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000000992892"}],"foaf:name":[{"@language":"en","@value":"NOTSU Kenji"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"13408097"},{"@type":"EISSN","@value":"18804225"},{"@type":"EISSN","@value":"18843271"},{"@type":"CODEN","@value":"JMSJEY"},{"@type":"NDL_BIB_ID","@value":"000003542873"},{"@type":"ISSN","@value":"13408097"},{"@type":"LISSN","@value":"13408097"},{"@type":"PISSN","@value":"https://id.crossref.org/issn/13408097"},{"@type":"NCID","@value":"AN0010555X"}],"prism:publicationName":[{"@language":"en","@value":"Journal of the Mass Spectrometry Society of Japan"},{"@language":"ja","@value":"質量分析"},{"@language":"en","@value":"J. Mass Spectrom. Soc. Jpn."},{"@language":"en","@value":"Mass spectroscopy"},{"@language":"ja","@value":"質量分析"}],"dc:publisher":[{"@language":"en","@value":"The Mass Spectrometry Society of Japan"},{"@language":"ja","@value":"一般社団法人 日本質量分析学会"}],"prism:publicationDate":"2001","prism:volume":"49","prism:number":"2","prism:startingPage":"61","prism:endingPage":"68"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"http://id.ndl.go.jp/bib/5748263"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I5748263"},{"@id":"http://www.jstage.jst.go.jp/article/massspec/49/2/49_2_61/_pdf"}],"availableAt":"2001","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Noble%20gas%20isotope%20analysis","dc:title":"Noble gas isotope analysis"},{"@id":"https://cir.nii.ac.jp/all?q=He%20isotope%20analysis","dc:title":"He isotope analysis"},{"@id":"https://cir.nii.ac.jp/all?q=Helium%20Standard%20of%20Japan","dc:title":"Helium Standard of Japan"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050024423140838784","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geochemical Signature of Deep Fluids Triggering Earthquake Swarm in the Noto Peninsula, Central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1051975833353243520","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Neutron lifetime measurement with pulsed cold neutrons"}]},{"@id":"https://cir.nii.ac.jp/crid/1360013168780100992","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Origin of hydrocarbon and noble gases, carbon dioxide and molecular nitrogen in the Miocene strata of the eastern part of the Polish Carpathian Foredeep: Isotopic and geological approach"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017280665417984","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Early Precursory Changes in the <sup>3</sup>He/<sup>4</sup>He Ratio Prior to the 2021 Tajogaite Eruption at Cumbre Vieja Volcano, La Palma, Canary Islands"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283689327909376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central <scp>A</scp>tlantic <scp>O</scp>cean)"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285706225063936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Dynamics of diffuse carbon dioxide emissions from Cumbre Vieja volcano, La Palma, Canary Islands"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707027703936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Lateral magma intrusion from a caldera-forming magma chamber: Constraints from geochronology and geochemistry of volcanic products from lateral cones around the Aso caldera, SW Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643840078336","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Noble gas variation during partial crustal melting and magma ascent processes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643840191488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Partial melting and subduction-related metasomatism recorded by geochemical and isotope (He-Ne-Ar-Sr-Nd) compositions of spinel lherzolite xenoliths from Coyhaique, Chilean Patagonia"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567181201676672","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Fumarole/plume and diffuse CO2 emission from Sierra Negra caldera, Galapagos archipelago"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567181201865216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Variations in thermal state revealed by the geochemistry of fumarolic gases and hot-spring waters of the Tateyama volcanic hydrothermal system, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182296013440","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Leakage of magmatic–hydrothermal volatiles from a crater bottom formed by a submarine eruption in 1989 at Teishi Knoll, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183038065664","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Geochemical evidence of different sources of long-period seismic events at Deception volcano, South Shetland Islands, Antarctica"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183244805504","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Accurate Determination of the Absolute <sup>3</sup>He/<sup>4</sup>He Ratio of a Synthesized Helium Standard Gas (Helium Standard of Japan, HESJ): Toward Revision of the Atmospheric <sup>3</sup>He/<sup>4</sup>He Ratio"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183244850816","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Halogen Heterogeneity in the Lithosphere and Evolution of Mantle Halogen Abundances Inferred From Intraplate Mantle Xenoliths"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183244871552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Recycled Components in Mantle Plumes Deduced From Variations in Halogens (Cl, Br, and I), Trace Elements, and <sup>3</sup>He/<sup>4</sup>He Along the Hawaiian‐Emperor Seamount Chain"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567186208100224","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Surface CO\n            <sub>2</sub>\n            emission and rising bubble plumes from degassing of crater lakes in São Miguel Island, Azores"}]},{"@id":"https://cir.nii.ac.jp/crid/1360568466795014016","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Fluid overpressure in subduction plate boundary caused by mantle-derived fluids"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580232169305216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Noble gas isotopes reveal degassing-derived eruptions at Deception Island (Antarctica): implications for the current high levels of volcanic activity"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584340698063744","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Two metasomatic events recorded by noble gas characteristics in the Finero mantle wedge: Extreme fractionation (He, Ar) and seawater penetration into the mantle deformation zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360588380587203200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Pristine helium from the Karoo mantle plume within the shallow asthenosphere beneath 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