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Activity of the proto-Sun revealed by multi-isotope analyses

Research Project

Project/Area Number 15K17791
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Geochemistry/Cosmochemistry
Research InstitutionHokkaido University

Principal Investigator

Bajo Ken-ichi  北海道大学, 理学研究院, 助教 (70624758)

Research Collaborator OKAZAKI Ryuji  
KAWASAKI Noriyuki  
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords希ガス同位体 / 二次イオン質量分析 / 消滅核種 / 原始太陽 / 太陽宇宙線 / 希ガス同位体分析 / Al-Mg年代 / Be-B同位体分析 / 局所同位体分析 / CAI / メリライト / 銀河宇宙線 / Ca-Al rich inclusion / Solar cosmic ray / Spallogenic nuclides / Noble gas
Outline of Final Research Achievements

Ca-Al-rich inclusions (CAIs) in primitive chondrite meteorites contain detectable amounts of extinct nuclides such as 26Al (half life of 0.705 Myr) and 10Be (half life of 1.36 Myr). Especially, excess 10Be in CAIs, which would have been produced by solar cosmic ray (SCR) spallation, suggests that the proto-sun was more radiative than the present sun [1]. The intense SCRs could also produce 22Na, which decays to 22Ne (half life of 2.61 yr), from Mg, Al, and Si via spallation reaction. As sodium is a minor element composing melilite crystals of igneous CAIs [2, 3], excess 22Na could be found in CAIs formed at the early stage of the solar system evolution. However, such CAIs with excess 22Ne derived from 22Na have not been observed . Here, we report the excess in 22Ne in an igneous CAI from Allende CVox.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (16 results)

All 2018 2016 2015 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Acknowledgement Compliant: 3 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 7 results,  Invited: 2 results)

  • [Int'l Joint Research] Korean Polar Research Institute (KOPRI)(韓国)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] High spatial resolution imaging of helium isotope by TOF-SNMS.2016

    • Author(s)
      Bajo, K.-i., Itose, S., Matsuya, M., Ishihara, M., Uchino, K., Kudo, M., Sakaguchi, I. and Yurimoto, H.
    • Journal Title

      Surf. Interface Anal.

      Volume: 48 Issue: 11 Pages: 1190-1193

    • DOI

      10.1002/sia.6085

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Evaluation of multi-turn time-of-flight mass spectrum of laser ionization mass nanoscope.2016

    • Author(s)
      Tonotani, A., Bajo, K.-i., Itose, S., Ishihara, M., Uchino, K. and Yurimoto, H.
    • Journal Title

      Surf. Interface Anal.

      Volume: 48 Issue: 11 Pages: 1122-1126

    • DOI

      10.1002/sia.6112

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Quantitative analysis of helium by post-ionization method using femtosecond laser technique2016

    • Author(s)
      H. Yurimoto, K. Bajo, I. Sakaguchi, T. Suzuki, J.G. A.J.G. Jurewicz, S. Itose, K. Uchinof, M. Ishihara
    • Journal Title

      Surface and Interface Analysis

      Volume: 48 Issue: 11 Pages: 1181-1184

    • DOI

      10.1002/sia.6119

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High spatial resolution imaging of helium isotope by TOF-SNMS2016

    • Author(s)
      K. Bajo, S. Itose, M. Matsuya, M. Ishihara, K. Uchino, M. Kudo, I. Sakaguchi, and H. Yurimoto
    • Journal Title

      Surface and Interface Analysis

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] Depth profiling analysis of solar wind helium collected in diamond-like carbon film from <i>Genesis</i>2015

    • Author(s)
      Bajo, K., Olinger, C. T., Jurewicz, A. J. G., Burnett, D. S., Sakaguchi, I., Suzuki, T., Itose, S., Ishihara, M., Uchino, K., Wieler, R. and Yurimoto, H.
    • Journal Title

      GEOCHEMICAL JOURNAL

      Volume: 49 Issue: 5 Pages: 559-566

    • DOI

      10.2343/geochemj.2.0385

    • NAID

      130005101418

    • ISSN
      0016-7002, 1880-5973
    • Year and Date
      2015-09-30
    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Spallogenic 22Na in an Allende Ca-Al-rich inclusion2018

    • Author(s)
      Ken-ichi BAJO
    • Organizer
      Solar System Symposium in Sapporo 2018
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Genesis DOS試料のヘリウム・ネオン深さ方向分析2016

    • Author(s)
      馬上謙一,殿谷梓,C. T. Olinger, A. J. G. Jurewicz, D. S. Burnett,坂口勲,鈴木拓,糸瀬悟,石原盛男, 内野喜一郎,R. Wieler,圦本尚義
    • Organizer
      日本質量分析学会同位体比部会
    • Place of Presentation
      秋田温泉さとみ(秋田県・秋田市)
    • Year and Date
      2016-11-16
    • Related Report
      2016 Research-status Report
  • [Presentation] Micro distribution of solar wind helium on Itokawa particles2016

    • Author(s)
      K. Bajo, I. Sakaguchi, T. T. Suzuki, S. Itose, M. Matsuya, M. Ishihara,K. Uchino and H. Yurimoto
    • Organizer
      International Workshop: Planetary Science and Space Exploration
    • Place of Presentation
      東北大学(宮城県・仙台市)
    • Year and Date
      2016-07-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Micro distribution of solar wind helium on Itokawa particles2016

    • Author(s)
      K. Bajo, I. Sakaguchi, T. T. Suzuki, S. Itose, M. Matsuya, M. Ishihara,K. Uchino and H. Yurimoto
    • Organizer
      Goldschmidt 2016
    • Place of Presentation
      パシフィコ横浜(神奈川県・横浜市)
    • Year and Date
      2016-06-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 太陽風を捕集したGenesis DOS試料のヘリウム深さ方向分析2016

    • Author(s)
      馬上謙一,C. T. Olinger, A. J. G. Jurewicz, D. S. Burnett,坂口勲,鈴木拓,糸瀬悟,石原盛男, 内野喜一郎,R. Wieler,圦本尚義
    • Organizer
      第64回質量分析総合討論会
    • Place of Presentation
      ホテル阪急エキスポパーク(大阪府・吹田市)
    • Year and Date
      2016-05-18
    • Related Report
      2016 Research-status Report
  • [Presentation] High spatial resolution imaging of helium isotope by TOF-SNMS2016

    • Author(s)
      Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis
    • Organizer
      Solar-System symposium in Sapporo 3S
    • Place of Presentation
      ルスツリゾート(北海道・虻田郡留寿都村)
    • Year and Date
      2016-02-17
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Micro distribution of solar wind helium on Itokawa particles2015

    • Author(s)
      K. Bajo, I. Sakaguchi, T. T. Suzuki, S. Itose, M. Matsuya, M. Ishihara,K. Uchino and H. Yurimoto
    • Organizer
      HAYABUSA2015: 3rd Symposium of Solar System Materials
    • Place of Presentation
      JAXA 相模原キャンパス(神奈川県・相模原市)
    • Year and Date
      2015-11-18
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Data Acquisition Electronic System for Time-of-Flight Sputtered Neutral Mass Spectrometer2015

    • Author(s)
      K. Bajo, O. Fujioka, S. Itose, M. Ishihara, K. Uchino and H. Yurimoto
    • Organizer
      10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15 (ALC'15)
    • Place of Presentation
      くにびきメッセ(島根県・松江市)
    • Year and Date
      2015-10-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] High Spatial Resolution Helium Isotope Imaging with LIMAS2015

    • Author(s)
      K. Bajo, S. Itose, M. Matsuya, M. Ishihara, K. Uchino, I. Sakaguchi and H. Yurimoto
    • Organizer
      10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15 (ALC'15)
    • Place of Presentation
      くにびきメッセ(島根県・松江市)
    • Year and Date
      2015-10-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] トンネルイオン化スパッタ粒子質量分析による局所希ガス同位体分析の現状2015

    • Author(s)
      馬上謙一
    • Organizer
      日本地球惑星科学連合2015年大会
    • Place of Presentation
      幕張メッセ(千葉県・千葉市美浜区)
    • Year and Date
      2015-05-24
    • Related Report
      2015 Research-status Report
    • Invited

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Published: 2015-04-16   Modified: 2019-03-29  

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