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2015 Fiscal Year Annual Research Report

エマルションによる大統計ダブルハイパー核生成実験

Research Project

Project/Area Number 23224006
Research InstitutionGifu University

Principal Investigator

仲澤 和馬  岐阜大学, 教育学部, 教授 (60198059)

Co-Investigator(Kenkyū-buntansha) 谷田 聖  国立研究開発法人日本原子力研究開発機構, 先端基礎研究センター, 研究副主幹 (00360587)
肥山 詠美子  国立研究開発法人理化学研究所, 仁科研究センター, 准主任研究員 (10311359)
渡部 豊喜  名古屋大学, 理学(系)研究科(研究院), 技術専門員 (20402422)
高橋 仁  大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (60353372)
星野 香  岐阜大学, 教育学部, 非常勤講師 (70022738)
Project Period (FY) 2011-04-01 – 2016-03-31
Keywordsダブルハイパー核 / エマルション / 全面スキャン / SSD / 少数多体計算
Outline of Annual Research Achievements

平成27年5月にビーム形状を試験したところ,期待値より約3倍大きく広がることがわかった。続く10月のビームタイムでは,広がりを抑えるための試験,種々検出器の駆動試験,グザイの位置・角度検知の半導体飛跡検出器(SSD)とエマルション乾板との位置較正技術の試験を実施し,広がりの抑制と高純度・高強度のビーム取得に成功した。SSDとエマルションとの位置関係は,前のE373実験の数倍よい約50ミクロンの精度で較正できた。
東日本大震災や放射の漏れ事故によるビーム照射時期の遅れで神岡地下施設に保管中の乾板の被ばくは,宇宙線は全く問題ない。しかし,顕微鏡画像のコントラストを低下させ飛跡の自動検出を困難にするガンマ線によるコンプトン電子の記録が,前のE373実験での最大値に近づいている。そこで平成28年6月に総量の2割のビームタイムが約束された。残りは平成29年の3月とも言われるが,電子蓄積量はE373の最大値を超え全く未知の領域となる。そのためコンプトン電子で感光した潜像を退行させる処理を準備している。
SSDで検出されたグザイを乾板中で全自動追跡する上で重要となるのは,35cm四方の乾板のどこでも高精度に位置較正できることである。乾板に垂直に入射するビームを乾板どうしの接する面上で検出し,その分布を合せることで1ミクロン以下の精度をE373乾板(25cm四方)で達成した。この精度で単一に検出されるグザイの顕微鏡下での追跡は,若干の角度依存性はあるものの95%以上の成功を収めた。一方全面スキャン法では,顕微鏡の倍率を若干上げることで画像処理の効率を向上させ,無関係事象の検出を低下させ,約100事象/週の頻度で分岐点が二つ以上の事象(ハイパー核)の検出に成功したが,その解析速度が課題である。
平成26年に発表したKISO eventをもとに,中性子星の状態方程式に関して理論を展開した。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

  • Research Products

    (40 results)

All 2016 2015 Other

All Journal Article (8 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 8 results,  Open Access: 5 results,  Acknowledgement Compliant: 4 results) Presentation (31 results) (of which Int'l Joint Research: 19 results,  Invited: 17 results) Remarks (1 results)

  • [Journal Article] ダブルハイパー核研究と原子核乾板技術2016

    • Author(s)
      仲澤 和馬
    • Journal Title

      原子核研究

      Volume: 60 Pages: 109~121

    • Peer Reviewed
  • [Journal Article] 超巨大ハイパー核としての中性子星:混在ハイペロンの謎2016

    • Author(s)
      仲澤 和馬,高塚 龍之
    • Journal Title

      パリティ

      Volume: 31-4 Pages: 12~18

    • Peer Reviewed
  • [Journal Article] Equation of state for neutron stars with hyperons using a variational method2016

    • Author(s)
      H. Togashi, E. Hiyama, Y. Yamamoto, M. Takano
    • Journal Title

      Physical Review C

      Volume: 93 Pages: 035808-03521

    • DOI

      10.1103/PhysRevC.93.035808

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Study of double-strangeness nuclear systems with nuclear emulsion2015

    • Author(s)
      K.Nakazawa, et al.
    • Journal Title

      Physics Procedia

      Volume: 80 Pages: 69~73

    • DOI

      10.1016/j.phpro.2015.11.079

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Resonant states of the neutron-rich hypernucleus 7He2015

    • Author(s)
      E. Hiyama, M. Isaka, M. Kamimura, T. Myo, T. Motoba
    • Journal Title

      Physical Review C

      Volume: 91 Pages: 054316-0454322

    • DOI

      10.1103/PhysRevC.91.054316

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Radiative capture reaction rate from to H dibaryon in the imaginary time method2015

    • Author(s)
      R. Hikota, Y. Funaki, E. Hiyama, M. Oka
    • Journal Title

      Physical Review C

      Volume: 92 Pages: 015205-015215

    • DOI

      10.1103/PhysRevC.92.015205

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Cosmic-ray test of a time-of-flight detector for double-strangeness experiments at J-PARC2015

    • Author(s)
      S.H. Kim, K. Tanida et al.
    • Journal Title

      Nucl. Instr. Methods A

      Volume: 795 Pages: 39-44

    • DOI

      10.1016/j.nima.2015.05.046

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of Single-Sided Silicon Detectors in the Emulsion-Hybrid System at J-PARC2015

    • Author(s)
      J.Y. Lee, K. Tinida et al.
    • Journal Title

      JPS. Conf. Proc.

      Volume: 8 Pages: 012008

    • DOI

      10.7566/JPSCP.8.021008

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] J-PARC E07のハイブリッドエマルション法2016

    • Author(s)
      J. Yoshida
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学
    • Year and Date
      2016-03-19 – 2016-03-22
  • [Presentation] J-PARC E07実験における大型原子核乾板現像法の研究開発2016

    • Author(s)
      伊藤 宏紀
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学
    • Year and Date
      2016-03-19 – 2016-03-22
  • [Presentation] 画像処理を用いたα線飛跡測定システムの開発2016

    • Author(s)
      小林 秀隆
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学
    • Year and Date
      2016-03-19 – 2016-03-22
  • [Presentation] E07実験で使用するエマルジョンカセットの性能評価2016

    • Author(s)
      遠藤 陽子
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学
    • Year and Date
      2016-03-19 – 2016-03-22
  • [Presentation] Exotic nuclei with double strangeness in nuclear emulsion2016

    • Author(s)
      J. Yoshida
    • Organizer
      12th International Conference on Low Energy Antiproton Physics
    • Place of Presentation
      金沢歌劇座
    • Year and Date
      2016-03-06 – 2016-03-11
  • [Presentation] The first evidence of Xi-hypernucleus2016

    • Author(s)
      K. Nakazawa
    • Organizer
      宇宙核物理連絡協議会研究会
    • Place of Presentation
      国立天文台,東京
    • Year and Date
      2016-02-22 – 2016-02-24
  • [Presentation] Experiment for Double-Hypernuclei with Nuclear Emulsion2015

    • Author(s)
      K. Nakazawa
    • Organizer
      ラショー大学 学術講演会
    • Place of Presentation
      Lashio Univ., Myanmar
    • Year and Date
      2015-12-22 – 2015-12-22
    • Invited
  • [Presentation] Structure of neutron-rich Λ hypernucleus 7He_L2015

    • Author(s)
      E. Hiyama
    • Organizer
      Japan-China Joint Symposium on Nuclear physics
    • Place of Presentation
      大阪
    • Year and Date
      2015-11-08 – 2015-11-12
    • Int'l Joint Research / Invited
  • [Presentation] Hypernuclear Physics at KEK-PS and J-PARC2015

    • Author(s)
      K. Nakazawa
    • Organizer
      11th European Research Conference on "Electromagnetic Interaction with Nucleons and Nuclei "EINN2015"
    • Place of Presentation
      Cyprus
    • Year and Date
      2015-10-31 – 2015-11-07
    • Int'l Joint Research
  • [Presentation] Structure of light Λ few-body hypernuclei2015

    • Author(s)
      E. Hiyama
    • Organizer
      Korea Physics meeting
    • Place of Presentation
      慶州市, Korea
    • Year and Date
      2015-10-21 – 2015-10-23
    • Invited
  • [Presentation] Selected results on nuclei and hadrons with strangeness from J-PARC2015

    • Author(s)
      K. Tanida
    • Organizer
      韓国物理学会
    • Place of Presentation
      慶州市, Korea
    • Year and Date
      2015-10-21 – 2015-10-23
    • Invited
  • [Presentation] Structure of light Lambda hypernuclei2015

    • Author(s)
      E. Hiyama
    • Organizer
      International Conference on Nuclear Fragmentation 2015 (NUFRA2015)
    • Place of Presentation
      Kemer, トルコ
    • Year and Date
      2015-10-04 – 2015-10-11
    • Int'l Joint Research / Invited
  • [Presentation] Nuclei with strangeness at J-PARC2015

    • Author(s)
      K. Tanida
    • Organizer
      International Conference on Nuclear Fragmentation 2015 (NUFRA2015)
    • Place of Presentation
      Kemer, トルコ
    • Year and Date
      2015-10-04 – 2015-10-11
    • Invited
  • [Presentation] Hypernuclei: An Overview2015

    • Author(s)
      E. Hiyama
    • Organizer
      XVI International Conference on Hadron Spectroscopy
    • Place of Presentation
      Newport News, USA
    • Year and Date
      2015-09-13 – 2015-09-18
    • Int'l Joint Research / Invited
  • [Presentation] Experimental status of S=-2 hypernuclei2015

    • Author(s)
      K. Nakazawa
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research / Invited
  • [Presentation] Scanning systems for double strangeness nuclei in nuclear emulsion2015

    • Author(s)
      J. Yoshida
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] Structure of few-body light Λ hypernuclei2015

    • Author(s)
      E. Hiyama
    • Organizer
      HYP2015: 12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research / Invited
  • [Presentation] Development of PID method in nuclear emulsion2015

    • Author(s)
      S. Kinbara
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] Study of lifetimes and binding energies of light single hypernuclei withnuclear emulsion2015

    • Author(s)
      Myint Kyaw Soe
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] Development of semi-automatic α-decay track measurement2015

    • Author(s)
      H. Kobayahsi
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] The alignment method of the emulsion plates for Ξ-hyperon tracking onJ-PARC E072015

    • Author(s)
      D. Nakashima
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] Status of nuclear emulsion plates for J-PARC E07 experiment2015

    • Author(s)
      H. Itoh
    • Organizer
      12th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      東北大学
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research
  • [Presentation] Structure of neutron-rich Λ hypernucleus, 7He_L2015

    • Author(s)
      E. Hiyama
    • Organizer
      CKorJPARC Workshop
    • Place of Presentation
      プサン,韓国
    • Year and Date
      2015-08-24 – 2015-08-27
    • Int'l Joint Research / Invited
  • [Presentation] Xi-Hypernuclei and Experiments @ J-PARC2015

    • Author(s)
      K. Nakazawa
    • Organizer
      J-PARC Hadron Salon
    • Place of Presentation
      茨城県東海村
    • Year and Date
      2015-08-03 – 2015-08-05
    • Invited
  • [Presentation] Few-body view of hypernuclei2015

    • Author(s)
      E. Hiyama
    • Organizer
      EMMI Workshop: Anti-matter, hyper-matter and exotica production ad the LHC
    • Place of Presentation
      Geneva,スイス
    • Year and Date
      2015-07-20 – 2015-07-22
    • Int'l Joint Research / Invited
  • [Presentation] Xi-Nucleus interaction from the first evidence of Xi$^{-14}$ N system2015

    • Author(s)
      K. Nakazawa
    • Organizer
      Hadron Nuclear Physics 2015
    • Place of Presentation
      Krabi, Thailand
    • Year and Date
      2015-07-07 – 2015-07-11
    • Int'l Joint Research
  • [Presentation] Structure of Neutron Rich Lambda Hypernuclei2015

    • Author(s)
      E. Hiyama
    • Organizer
      The 9th APCTP-BLTP JINR Joint Workshop in Kazakhstan Modern Problems in Nuclear and Elementary Particle Physics
    • Place of Presentation
      Almaty, カザフスタン
    • Year and Date
      2015-06-27 – 2015-07-04
    • Int'l Joint Research / Invited
  • [Presentation] Strangeness and NS2015

    • Author(s)
      E. Hiyama
    • Organizer
      Neutrinos and Dark Matter in Nuclear Physics 2015
    • Place of Presentation
      フィンランド
    • Year and Date
      2015-06-01 – 2015-06-05
    • Int'l Joint Research / Invited
  • [Presentation] Overview of hadron physics at J-PARC2015

    • Author(s)
      K. Tanida
    • Organizer
      The 10th International Workshop on the Physics of Excited Nucleons (NSTAR2015)
    • Place of Presentation
      大阪
    • Year and Date
      2015-05-25 – 2015-05-28
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of hypernuclear physics2015

    • Author(s)
      E. Hiyama
    • Organizer
      21st International Conference on Few-body Problems in Physics
    • Place of Presentation
      シカゴ,米国
    • Year and Date
      2015-05-18 – 2015-05-22
    • Int'l Joint Research / Invited
  • [Presentation] Nuclear matter with hyperon in neutron star under nuclear physics with double strangeness2015

    • Author(s)
      K. Nakazawa
    • Organizer
      KMI seminar(名古屋大学理学研究科)
    • Place of Presentation
      名古屋大学理学研究科
    • Year and Date
      2015-04-22 – 2015-04-22
    • Invited
  • [Remarks] http://www.phys.ed.gifu-u.ac.jp/

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Published: 2017-01-06  

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