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1995 Fiscal Year Final Research Report Summary

Noble-gas mass-spectrometer of high performance

Research Project

Project/Area Number 06554023
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 地球化学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

TAKAOKA Nobuo  Kyushu University, Faculty of Science, Professor, 理学部, 教授 (40028171)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Tomoki  Kyushu University, Faculty of Science, Research Associate, 理学部, 助手 (20260721)
Project Period (FY) 1994 – 1995
Keywordsmass spectrometer / noble gas / meteorite
Research Abstract

Since noble gases are chemically inert and similar in their chemical properties, we may grasp them as a chemical element with 23 isotopes, in cosmo-and geo-chemistry. In addition, there are noble gas isotopes produced from radioactive parent nuclides of different lifetime. These enable us to apply noble gases to problems concerning the evolution of the earth and planetary system. To know isotope signatures and trapping sites of meteoritic noble gases simultaneously, we analyze meteorite samples with a laser-micro-probe. For measuring noble gases of 10^4 atoms or less, evolved with the laser-micro-probe, we made a mass spectrometer of QQQH field configuration. The spectrometer has low magnification and three-dimensional focusing. We investgated sensitivity, mass resolution and background (vacuum) of the spectrometer. We obtained a good sensitivity but there remain some problems to be solved in mass resolution and background spectrum.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] N.Takaoka: "Where are noble gases trapped in Yamato-74063 (unique)?" Proc.NIPR Symp.Antarct.Meteorites. 7. 186-196 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Takaoka: "Enrichment and fractionation of noble gases in bubbles." Noble Gas Geochem.Cosmochem. (Ed.by J.Matsuda,Terra Sci.Pub.Co.). 23 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Nagao: "Noble gases and cosmic-ray exposure age of the Yamato-74357 lodranite." Proc.NIPR Symp.Antarct.Meteorites. 8. 297-303 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Takaoka: "Half-life of ^<130>Te double-beta decay measured with geologically qualified samples." Phys.Rev.C,. 53(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Takaoka: "Noble gases in tellurium and associated minerals and doublbeta decay of ^<130>Te." J.Mass Spectrom.Soc.Jpn.44. 63-77 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Takaoka: "Where are noble gases trapped in Yamato-74063 (unique)?" Proc.NIPR Symp.Antarct.Meteorites. 7. 186-196 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takaoka: "Enrichment and fractionation of noble gases in bubbles." Noble Gas Geochem.Cosmochem.(Ed.by J.Matsuda, Terra Sci.Pub.Co., Tokyo). 23-29 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Nagao: "Noble gases and cosmic-ray exposure age of the Yamato-74357 lodranite." Proc. NIPR Symp. Antarct. Meteorites. 8. 297-303 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takaoka: "Half-life of ^<130>Te double-beta decay measured with geologically qualified samples." Phys.Rev. C,53, (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Takaoka: "Noble gases in tellurium and associated minerals and double-beta decay of ^<130>Te." J.Mass Spectrom.Soc.Jpn.44. 63-77 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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