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2015 Fiscal Year Annual Research Report

実験と観測で解き明かす中性子星の核物質

Administrative Group

Project AreaNuclear matter in neutron stars investigated by experiments and astronomical observations
Project/Area Number 24105001
Research InstitutionTohoku University

Principal Investigator

田村 裕和  東北大学, 理学(系)研究科(研究院), 教授 (10192642)

Co-Investigator(Kenkyū-buntansha) 高橋 俊行  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 (50281960)
村上 哲也  京都大学, 理学(系)研究科(研究院), 講師 (50219896)
中村 隆司  東京工業大学, 理工学研究科, 教授 (50272456)
堀越 宗一  東京大学, 理学(系)研究科(研究院), 助教 (00581787)
高橋 忠幸  国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (50183851)
大西 明  京都大学, 基礎物理学研究所, 教授 (70250412)
玉川 徹  国立研究開発法人理化学研究所, その他部局等, その他 (20333312)
Project Period (FY) 2012-06-28 – 2017-03-31
Keywords原子核物理 / 中性子星 / X線天文学 / 冷却原子 / 核物質 / ストレンジネス / 中性子過剰核 / 重イオン衝突実験
Outline of Annual Research Achievements

●総括班打合わせを約2か月ごとに実施し、各計画研究の進捗状況の確認、研究会やスクール等の企画・準備を行った。●2015年9月17~18日に湘南国際村で領域全体の研究会を実施。56名が参加、計画研究・公募研究の成果発表やポスター発表を行った。●第4回ウィンタースクールを2016年2月24~26日に国立天文台で開催。大学院生や若手研究者を中心に約60名参加、講師4人による講義とポスターセッションを実施。●2015年7月24日~25日に新学術3領域(重力波天体・地下素核研究・中性子星核物質)合同シンポジウム「多面的アプローチで解きあかす宇宙と天体」を東北大で開催。約50名が参加、関連したテーマを扱う3つの新学術領域間の交流をはかった。 ●12月5日~6日にA01,A02,B01班主催研究会「高密度核物質に挑む実験の将来-施設・装置の観点から」を開催。●以下の国際会議等を共催した。*ハイ-パー核とストレンジ粒子国際会議(HYP2015) (2015年9月7~12日、東北大学、参加数約200名) *ストレンジネス核物理国際スクール(SNPSchool2015) (2015年9月3~5日、東北大学、参加者約60名) *Int. Symp. on Physics and Astronomy of Neutron Stars and Supernovae (2015年6月22~23日、国立天文台、参加者約35名) *国際ワークショップ Numazu Workshop 2015: Challenges of modeling supernovae with nuclear data(2015年9月1~4日,三島)。●宇宙核物理連絡協議会主催研究会(2016年2月22~24日、国立天文台)を共催。●入門書の執筆、市民向け講演会2件(長崎12月20日、仙台3月18日)のアウトリーチ活動を行った。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

毎年行っている全体研究会と若手スクールでは、いくつかの新しい成果が発表され、活発な議論が行われた。参加者数はいずれも50~60名と予想通りであった。
また、今回はじめての試みとして、同時に実施されている内容が近い3つの新学術領域の合同シンポジウムを行った。これは、我々が他の2つの新学術領域に提案して、準備・開催したものである。超新星爆発や中性子星などの3つの領域に共通する問題について議論を深めることができた。
関連する国際会議の共催や、研究会の開催、市民向け講演会なども積極的に行った。
結果として、成果のとりまとめにむけた活動が始まるとともに、当新学術領域の国内外の認知度は十分高まったといえる。

Strategy for Future Research Activity

●本新学術領域の最終年度となるため、成果とりまとめの方法について総括班会議等で
話し合って準備する。成果の資料を収集・整理しておき、年度末までにまとめる。●これまでの我々の活動により、「中性子核物質」の研究分野が関連研究者コミュニティで認知されてきたが、これを生かして来年度以降どのようにこの新分野を発展させるかを検討する。●総括班主催の企画としては、5年間のまとめの国際会議を主催する。すでに11月に仙台で開催することとしており、各計画研究や公募研究の成果発表の他、中性子星核物質に関連するテーマのレビューや展望についても外国人招待講演者等に講演していただく。当新学術分野について世界への宣伝を行う。●一方、大規模な全体研究会と若手スクールとを一つにまとめた形で12月に「とりまとめ研究会」を実施する。●市民向け講演会などのアウトリーチ活動も積極的に実施する。

  • Research Products

    (54 results)

All 2016 2015 Other

All Int'l Joint Research (6 results) Journal Article (18 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 18 results,  Open Access: 6 results,  Acknowledgement Compliant: 11 results) Presentation (24 results) (of which Int'l Joint Research: 22 results,  Invited: 23 results) Book (1 results) Remarks (1 results) Funded Workshop (4 results)

  • [Int'l Joint Research] Seoul Nationl University/KoreaUniversity(韓国)

    • Country Name
      KOREA (REP. OF KOREA)
    • Counterpart Institution
      Seoul Nationl University/KoreaUniversity
  • [Int'l Joint Research] Michigan State University/TexasA&M University/Western Michigan University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Michigan State University/TexasA&M University/Western Michigan University
  • [Int'l Joint Research] Shanghai InstituteofAppliedPhysics/Tsinghua University/STFCDaresburyLaboratory(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Shanghai InstituteofAppliedPhysics/Tsinghua University/STFCDaresburyLaboratory
  • [Int'l Joint Research] Universite de Caen/GANIL, CEA/DRF-CNRS/IN2P3/Universite de Paris Sud(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      Universite de Caen/GANIL, CEA/DRF-CNRS/IN2P3/Universite de Paris Sud
  • [Int'l Joint Research] GSI/Technische Universitat Darmstadt(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      GSI/Technische Universitat Darmstadt
  • [Int'l Joint Research]

    • # of Other Countries
      3
  • [Journal Article] One-neutron removal from 29Ne : Defining the lower limits of the island of inversion2016

    • Author(s)
      N. Kobayashi, T. Nakamura et al.
    • Journal Title

      Physical Review C

      Volume: 94 Pages: 014613 1-11

    • DOI

      10.1103/PhysRevC.93.014613

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Nucleus 26O: A Barely Unbound System beyond the Drip Line2016

    • Author(s)
      Y.Kondo, T. Murakami, Nakamura et al.
    • Journal Title

      Physical Review Letters

      Volume: 116 Pages: 102503 1-6

    • DOI

      10.1103/PhysRevLett.116.102503

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] The First Demonstration of the Concept of “narrow-FOV Si/CdTe semiconductor Compton camera2016

    • Author(s)
      Ichinohe, Yuto ; Takahashi, Tadayuki ; et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A

      Volume: 806 Pages: 5-13

    • DOI

      10.1016/j.nima.2015.09.081

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Approaches to QCD phase diagram; effective models, strong-coupling lattice QCD, and compact stars2016

    • Author(s)
      A. Ohnishi
    • Journal Title

      Journal of Physics.: Conference Series

      Volume: 668 Pages: 012004 1-12

    • DOI

      10.1088/1742-6596/668/1/012004

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The first evidence of a deeply bound state of Ξ-14N system2015

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

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 033D02

    • DOI

      10.1093/ptep/ptv008

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of Spin-Dependent Charge Symmetry Breaking in ΛN Interaction: Gamma-Ray Spectroscopy of 4ΛHe2015

    • Author(s)
      T.O. Yamamoto, T. Koike, K. Miwa, T. Takahashi, H. Tamura et al.
    • Journal Title

      Physical Review Letters

      Volume: 115 Pages: 222501 1-5

    • DOI

      10.1103/PhysRevLett.115.222501

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Precise determination of 12ΛC level structure by γ-ray spectroscopy2015

    • Author(s)
      K. Hosomi, T. Koike, K. Miwa, T. Takahashi, H. Tamura et al.
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 021D01 1-8

    • DOI

      10.1093/ptep/ptv113

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of the "K-pp"-like structure in the d(π+,K+) reaction at 1.69 GeV/c2015

    • Author(s)
      Y. Ichikawa, T. Koike, K. Miwa, T. Takahashi, H. Tamura et al.
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 021D01

    • DOI

      10.1093/ptep/ptv002

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Inclusive spectrum of the d(π+,K+) reaction at 1.69 GeV/c2015

    • Author(s)
      Y. Ichikawa, T. Koike, K. Miwa, T. Takahashi, H. Tamura et al.
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 021D01

    • DOI

      10.1093/ptep/ptu128

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

    • Author(s)
      S.H. Kim, T. Takahashi et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A

      Volume: 795 Pages: 39-44

    • DOI

      10.1016/j.nima.2015.05.046

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] SπRIT: A time-projection chamber for symmetry-energy studies2015

    • Author(s)
      R. Shane, T. Murakami et al.
    • Journal Title

      Nuclear Instruments and Methods A

      Volume: 784 Pages: 513-517

    • DOI

      10.1016/j.nima.2015.01.026

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] nvariant Mass Spectroscopy of Extremely Neutron-Rich Nuclei with SAMURAI at RIBF2015

    • Author(s)
      Y. Kondo, T. Nakamura, T. Murakami et al.
    • Journal Title

      JPS Conference Proceedings

      Volume: 6 Pages: 010006

    • DOI

      10.7566/JPSCP.6.010006

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] New findings on structure and production of 10He from 11Li with the (d, 3He) reaction2015

    • Author(s)
      A.Matta, T. Nakamura et al.
    • Journal Title

      Physical Review C

      Volume: 92 Pages: 041302(R) 1-6

    • DOI

      10.1103/PhysRevC.92.041302

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Portable Si/CdTe Compton Camera and its Applications to the Visualization of Radioactive Substances2015

    • Author(s)
      Takeda, Shin'ichiro ; Takahashi, Tadayuki ; et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A

      Volume: 787 Pages: 207-211

    • DOI

      10.1016/j.nima.2014.11.119

    • Peer Reviewed
  • [Journal Article] Parametric Instability of Classical Yang-Mills Fields under Color Magnetic Background2015

    • Author(s)
      S. Tsutsui, H. Iida, T. Kunihiro, A. Ohnishi
    • Journal Title

      Physical Review D

      Volume: 91 Pages: 076003 1-14

    • DOI

      10.1103/PhysRevD.91.076003

    • Peer Reviewed
  • [Journal Article] Entropy production in quantum Yang-Mills mechanics in semi-classical approximation2015

    • Author(s)
      H. Tsukiji, H. Iida, T. Kunihiro, A. Ohnishi, T. T. Takahashi
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 083A01 (1-16)

    • DOI

      10.1093/ptep/ptv107

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Topological feature and phase structure of QCD at complex chemical potential2015

    • Author(s)
      K. Kashiwa, A. Ohnishi
    • Journal Title

      Physics Letters B

      Volume: 750 Pages: 282-286

    • DOI

      10.1016/j.physletb.2015.09.036

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Net-baryon number fluctuations across the chiral phase transition at finite density in strong coupling lattice QCD2015

    • Author(s)
      T. Ichihara, K. Morita, A. Ohnishi
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2015 Pages: 113D01 (1-16)

    • DOI

      10.1093/ptep/ptv141

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Study of ΛN interaction via the A=4 mirror Λ hypernuclei: 4ΛH and 4ΛHe2016

    • Author(s)
      T. Koike
    • Organizer
      Workshop on "Future directions for nuclear structure and reaction theories: Ab initio approaches for 2020"
    • Place of Presentation
      GANIL, Caen, France
    • Year and Date
      2016-03-14 – 2016-03-18
    • Int'l Joint Research / Invited
  • [Presentation] Recent Achievements at J-PARC and Future Prospects of Hypernuclear Study2016

    • Author(s)
      H. Tamura
    • Organizer
      The Second JLab Hypernuclear Workshop
    • Place of Presentation
      Thomas Jefferson Laboratory, Newport News, VA, USA
    • Year and Date
      2016-03-14 – 2016-03-15
    • Int'l Joint Research / Invited
  • [Presentation] Hyperon-proton scattering experiment using Kaon and pion beams2016

    • Author(s)
      K. Miwa
    • Organizer
      International workshop on physics at the extended hadron experimental facility of J-PARC
    • Place of Presentation
      KEK Tokai campus, Tokai, Japan
    • Year and Date
      2016-03-05 – 2016-03-06
    • Int'l Joint Research / Invited
  • [Presentation] Present Status and Future Prospectsof Hypernuclear Physicsat J-PARC2016

    • Author(s)
      H. Tamura
    • Organizer
      Internation Workshop on "Production and study of neutron-rich hypernucle -.Physics and potentialities at FAIR/R3B
    • Place of Presentation
      CEA-Saclay, Orme des Merisiers, France
    • Year and Date
      2016-01-19 – 2016-01-21
    • Int'l Joint Research / Invited
  • [Presentation] Structure of Neutron Drip-line Nuclei2016

    • Author(s)
      T. Nakamura
    • Organizer
      39th Symposium on Nuclear Physics
    • Place of Presentation
      Cocoyoc, Mexico
    • Year and Date
      2016-01-05 – 2016-01-08
    • Int'l Joint Research / Invited
  • [Presentation] SπRIT project at RIBF, RIKEN - exploring symmetry energy at supra-density2015

    • Author(s)
      T. Murakami
    • Organizer
      Science with Beams of Radioactive Isotopes (Pacifichem2015)
    • Place of Presentation
      Hawaii Convention Center, USA
    • Year and Date
      2015-12-17 – 2015-12-18
    • Int'l Joint Research / Invited
  • [Presentation] Weakly bound and unbound nuclei2015

    • Author(s)
      T. Nakamura
    • Organizer
      The 9th Japan-China Joint Nuclear Physics Symposium (JCNP2015)
    • Place of Presentation
      Osaka University, Suita, Osaka
    • Year and Date
      2015-11-07 – 2015-11-12
    • Int'l Joint Research / Invited
  • [Presentation] SpaceWire-based Network Architecture for the ASTRO-H X-ray Satellite, New Parts and Manufacturing Technologies for Changing the Space Electronics2015

    • Author(s)
      Tadayuki. Takahashi
    • Organizer
      The 28th Microelectronics Workshop
    • Place of Presentation
      Epocal Tsukuba, Tsukuba, Japan
    • Year and Date
      2015-10-21 – 2015-10-22
    • Int'l Joint Research / Invited
  • [Presentation] Hypernuclear Physics at J-PARC2015

    • Author(s)
      H. Tamura
    • Organizer
      Frontiers in hadron and nuclear physics with strangeness and charm
    • Place of Presentation
      ECT*, Trento, Italy
    • Year and Date
      2015-10-19 – 2015-10-23
    • Int'l Joint Research / Invited
  • [Presentation] Strangeness nuclear physics with high intensity secondary beams2015

    • Author(s)
      K. Miwa
    • Organizer
      The international workshop on future potential of high intensity proton accelerator for particle and nuclear physics (HINT2015)
    • Place of Presentation
      Ibaraki Quantum Beam Research Center, Tokai, Japan
    • Year and Date
      2015-10-13 – 2015-10-15
    • Int'l Joint Research / Invited
  • [Presentation] Theoretical Overview -Nuclear and Hadron Physics-2015

    • Author(s)
      A. Ohnishi
    • Organizer
      International Workshop on future potential of high intensity proton accelerator for particle and nuclear physics (HINT2015)
    • Place of Presentation
      J-PARC, Tokai, Japan
    • Year and Date
      2015-10-13 – 2015-10-13
    • Int'l Joint Research / Invited
  • [Presentation] X-ray generator: an application of micro pattern gas detector2015

    • Author(s)
      Toru Tamagawa
    • Organizer
      4th International Micro Pattern Gaseouse Detector Conference
    • Place of Presentation
      Trieste, Italy
    • Year and Date
      2015-10-12 – 2015-10-15
    • Int'l Joint Research
  • [Presentation] Gamma-ray spectroscopy of hypernuclei - recent results and prospects at J-PARC2015

    • Author(s)
      H. Tamura
    • Organizer
      The 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research / Invited
  • [Presentation] Lambda-Lambda interaction from two-particle intensity correlation in relativistic heavy-ion collisions2015

    • Author(s)
      A. Ohnishi, K. Morita, T. Furumoto
    • Organizer
      The 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)
    • Place of Presentation
      Tohoku University, Sendai
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research / Invited
  • [Presentation] High statics Σp scattering experiment using high intensity pion beams at J-PARC2015

    • Author(s)
      K. Miwa
    • Organizer
      The 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Year and Date
      2015-09-07 – 2015-09-12
    • Int'l Joint Research / Invited
  • [Presentation] Progress report on SAMURAI TPC2015

    • Author(s)
      T. Murakami
    • Organizer
      SAMURAI International Collaboration Workshop
    • Place of Presentation
      RIKEN, Wako, Japan
    • Year and Date
      2015-09-07 – 2015-09-08
    • Int'l Joint Research / Invited
  • [Presentation] Pion productions in mass asymmetric 28Si+In reactions at 400, 600 and 800 MeV/nucleon2015

    • Author(s)
      T. Murakami
    • Organizer
      International Symposium on Nuclear Symmetry Energy 2015 (NuSYM15)
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      2015-07-29 – 2015-08-02
    • Int'l Joint Research / Invited
  • [Presentation] Overview of hypernuclei -What are exciting now?2015

    • Author(s)
      H. Tamura
    • Organizer
      EMMI Workshop on anti-matter, hyper-matter and exotica production at the LHC
    • Place of Presentation
      CERN, Geneva, Switzerland
    • Year and Date
      2015-07-20 – 2015-07-22
    • Int'l Joint Research / Invited
  • [Presentation] Approaches to QCD phase diagram; effective models, strong coupling lattice QCD, and compact stars2015

    • Author(s)
      A. Ohnishi
    • Organizer
      Dense Matter 2015 (Helmholtz International Summer School & Dubna International Advanced School on Theoretical Physics / DIAS-TH)
    • Place of Presentation
      oint Institute for Nuclear Research, Dubna, Russia
    • Year and Date
      2015-06-29 – 2015-07-06
    • Int'l Joint Research / Invited
  • [Presentation] Weakly-bound and -unbound neutron-rich nuclei2015

    • Author(s)
      T. Nakamura
    • Organizer
      IIIrd Topical Workshop on Modern Aspects in Nuclear Structure
    • Place of Presentation
      Bormio, Italy
    • Year and Date
      2015-06-22 – 2015-06-28
    • Int'l Joint Research / Invited
  • [Presentation] Nuclear Structure near and beyond the neutron drip line probed by breakup2015

    • Author(s)
      T. Nakamura
    • Organizer
      Nuclear Structure and Dynamics III
    • Place of Presentation
      Portoroz, Slovenia
    • Year and Date
      2015-06-14 – 2015-06-19
    • Int'l Joint Research / Invited
  • [Presentation] Large acceptance spectrometer and possible new developments2015

    • Author(s)
      T. Nakamura
    • Organizer
      International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS2015)
    • Place of Presentation
      Grand Rapids, Michigan, USA
    • Year and Date
      2015-05-11 – 2015-05-15
    • Int'l Joint Research / Invited
  • [Presentation] SπRIT Project at RIBF, RIKEN -- present status and future2015

    • Author(s)
      T. Murakami
    • Organizer
      Korean Physical Society Meeting
    • Place of Presentation
      Deajeong, Korea
    • Year and Date
      2015-04-22 – 2015-04-24
    • Invited
  • [Presentation] Breakup experiments on drip-line nuclei at RIBF2015

    • Author(s)
      T. Nakamura
    • Organizer
      Korean Physical Society Meeting
    • Place of Presentation
      Deajeong, Korea
    • Year and Date
      2015-04-22 – 2015-04-24
    • Invited
  • [Book] 不安定核の物理2016

    • Author(s)
      中村隆司
    • Total Pages
      181
    • Publisher
      共立出版
  • [Remarks] 実験と観測で解き明かす中性子星の核物質

    • URL

      http://lambda.phys.tohoku.ac.jp/nstar/

  • [Funded Workshop] The 12th International Conference on Hyupernuclear and Strange Particle Physics (HYP2015)2015

    • Place of Presentation
      Tohoku University, Sendai
    • Year and Date
      2015-09-07 – 2015-09-12
  • [Funded Workshop] International School for Strangeness Nuclear Physics (SNP School 2015)2015

    • Place of Presentation
      Tohoku University, Sendai
    • Year and Date
      2015-09-03 – 2015-09-05
  • [Funded Workshop] Numazu Workshop 2015: Challenges of modeling supernovae with nuclear data2015

    • Place of Presentation
      The Mishima Chamber of Commerce and Industry, Mishima
    • Year and Date
      2015-09-01 – 2015-09-04
  • [Funded Workshop] International Symposium on Physics and Astronomy of Neutron Stars and Supernovae2015

    • Place of Presentation
      National Astronomical Observatory of Japan, Mitaka
    • Year and Date
      2015-07-21 – 2015-07-23

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Published: 2017-01-06  

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