Study of neutron many-body system via reaction of unstable nuclei

• Project/Area Number: 19204024
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: SHIMOURA Susumu 東京大学, 大学院・理学系研究科, 教授 (10170995)
• Co-Investigator(Kenkyū-buntansha): MICHIMASA Shinichiro 東京大学, 大学院・理学系研究科, 助教 (80392140) ; KAMADA Hiroyuki 九州工業大学, 工学部, 准教授 (80343333)
• Co-Investigator(Renkei-kenkyūsha): OTA Shinsuke 東京大学, 大学院・理学系研究科, 助教 (60548840)
• Project Period (FY): 2007 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000); Fiscal Year 2010: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2009: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000); Fiscal Year 2008: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000); Fiscal Year 2007: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
• Keywords: 不安定核ビーム / 中性子多体系 / 荷電交換反応 / 磁気分析器 / 中性子ドリップライン / 荷電粒子飛跡検出器 / 二重荷電交換反応 / ノックアウト反応 / 高分解能磁気分析器

Research Abstract

Process of exothermic charge exchange producing neutron-rich nuclei and multi-neutron system was investigated for understanding dynamics of multi-neutron system. Tracking detectors for high-resolution magnetic spectrometer(SHARAQ) and beam-line were developed as well as an intelligent detection system for two coincident alpha particles. Populations of highly excited states via an exothermic charge exchange reaction and of light neutron-rich nuclei via double charge exchange reaction were demonstrated, which is a basis for the experiment of tetra-neutron system scheduled in early 2012.

Research Products

• [Journal Article] Measurement of theIsovector Spin Monopole Resonance via the^<208> Pb,^<90> Zr(t,^3He) Reactions at 300MeV/u (2011)
  • Author(s): K. Miki, H. Sakai, T. Uesaka, H. Baba, G. P. A. Berg, N. Fukuda, D. Kameda, T. Kawabata, S. Kawase, T. Kubo, S. Michimasa, H. Miya, S. Noji, T. Ohnishi, S. Ota, A. Saito, Y. Sasamoto, M. Sasano, S. Shimoura, H. Takeda, H. Tokieda, K. Yako, Y. Yanagisawa, R. G. T. Zegers
  • Journal Title: J. Phys.: Conf. Ser. Volume: 312
• [Journal Article] SHARAQSpectrometer-Current Status and FutureEexperimental Plans (2010)
  • Author(s): T. Uesaka, S. Michimasa, S. Ota, S. Shimoura, 他(計31名)
  • Journal Title: Int. Symp. onExotic Nuclei, AIP Conf. Proc Volume: 1224 Pages: 573-581
• [Journal Article] New data acquisition systemfor the RIKEN Radioactive Isotope Beam Factory (2010)
  • Author(s): H. Baba, T. Ichihara, T. Ohnishi, S. Takeuchi, K. Yoshida, Y. Watanabe, S. Ota, S. Shimoura
  • Journal Title: Nucl. Instr. Meth. in Phys. Res Volume: 616 Pages: 65-68
• [Journal Article] THE He-6+He-6 AND alpha+He-8 CLUSTER STATES IN Be-12 VIA alpha-INELASTIC SCATTER (2010)
  • Author(s): A.Saito, et al.
  • Journal Title: MODERN PHYSICS LETTERS A Volume: 25 Pages: 1858-1861
  • Peer Reviewed
• [Journal Article] New data acquisition system for the RIKEN Radioactive Isotope Beam Factory (2010)
  • Author(s): H.Baba, et al.
  • Journal Title: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A Volume: 616 Pages: 65-68
  • Peer Reviewed
• [Journal Article] Low-lying intruder state of the unbound nucleus Be-13 (2010)
  • Author(s): Y.Kondo, et al.
  • Journal Title: Physics Letters B Volume: 690 Pages: 245-249
  • Peer Reviewed
• [Journal Article] High-resolution spectroscopyusing direct reactions of RI beams (2009)
  • Author(s): S. Shimoura
  • Journal Title: AIP Conf. Proc. Volume: 1120 Pages: 59-63
• [Journal Article] High-resolution spectroscopy using direct reactions of RI beams (2009)
  • Author(s): S. Shimoura
  • Journal Title: AIP Conference Proceedings 1120 Pages: 59-63
• [Journal Article] High-resolution spectroscopy using direct reactions of RI beams (2009)
  • Author(s): S.Shimoura
  • Journal Title: AIP Conference Proceedings 1120 Pages: 59-63
  • Peer Reviewed
• [Journal Article] HIGH-RESOLUTION SPECTROSCOPY USING RI-BEAMS-SHRAQ PROJECT (2009)
  • Author(s): S.Shimoura
  • Journal Title: International Jounal of Modern Physics E 18 Pages: 2011-2014
• [Journal Article] High-resolution spectroscopy using RI beams-SHARAQ project (2009)
  • Author(s): S. Shimoura
  • Journal Title: International Journal of Modern Physics E (印刷中)(掲載確定)
• [Journal Article] SHARAQ spectrometer and GRAPE, Proc. XVth Int. Conf. onElectromagnetic Isotope Separators andTechniques Related to their Applications(EMIS2007) (2008)
  • Author(s): S. Shimoura
  • Journal Title: Nucl. Instr. Meth. in Phys. Res Volume: 266 Pages: 4131-4136
• [Journal Article] SHARAQ spectrometer and GRAPE (2008)
  • Author(s): S. Shimoura
  • Journal Title: Nuclear Instr.and Meth.B 266 Pages: 4131-4136
• [Journal Article] Direct reactions of Borromean nuclei (2008)
  • Author(s): S. Shimoura
  • Journal Title: AIP Conference Proceedings 1011 Pages: 293-296
• [Journal Article] SHARAQ spectrometer and GRAPE (2008)
  • Author(s): S. Shimoura
  • Journal Title: Nuclear Instr. and Meth. B 266 Pages: 4131-4136
  • Peer Reviewed
• [Journal Article] SHARAQ spectrometer and GRAPE (2008)
  • Author(s): S.Shimoura
  • Journal Title: Nuclear Instr.and Meth.B (掲載確定)(印刷中)
  • Peer Reviewed
• [Journal Article] Direct reactions of Borromean nuclei (2008)
  • Author(s): S.Shimoura
  • Journal Title: AIP Conference Proceedings 1011(印刷中)(掲載確定)
  • Peer Reviewed
• [Presentation] High-resolution spectroscopyusing direct reactions of RI beams (2011)
  • Author(s): S. Shimoura
  • Organizer: 11th International Symposium on Origin ofMatter and Evolution of Galaxies(OMEGG11)
  • Place of Presentation: RIKEN, Wako, Japan
• [Presentation] 中性子系質量欠損核分光実験に向けた、検出器読み出しシステムの開発と性能評価 (2011)
  • Author(s): 木佐森慶一、下浦享、道正新一郎、大田晋輔、野地俊平、時枝紘史、横山輪、馬場秀忠
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 弘前
• [Presentation] Nuclear Physics Research at CNS (2010)
  • Author(s): S.Shimoura
  • Organizer: International Symposium on Nuclear Physics in Asia
  • Place of Presentation: 中国Beihang University
  • Year and Date: 2010-10-15
• [Presentation] Solution of Wolfenstein parameters from observables (2010)
  • Author(s): H. Kamada
  • Organizer: 21^<st> European Few-Body problem in Physics(EFB21)
  • Place of Presentation: Salamanca, Spain
  • Year and Date: 2010-08-31
• [Presentation] 300MeV/uにおける208Pb, 90Zr(t,3He) 反応を用いた荷電荷電時間変換回路 (QTC) の性能評価 (2010)
  • Author(s): 川瀬頌一郎, 大田晋輔, 馬場秀忠, 下浦享, 上坂友洋
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
• [Presentation] Recent developments of radiation detector systems for RIBF experiments (2009)
  • Author(s): S. Shimoura
  • Organizer: Workshop on developments of new scintillator detectors for gamma spectroscopy and imaging
  • Place of Presentation: イタリア ミラノ大学
  • Year and Date: 2009-11-16
• [Presentation] Recent developments of radiation detector systems for RIBF experiments (2009)
  • Author(s): S.Shimoura
  • Organizer: Workshop on developments of new scintillator detectors for gammaspectroscopy and imaging
  • Place of Presentation: イタリア ミラノ大学
  • Year and Date: 2009-11-16
• [Presentation] SHARAQ Overview and Scientific Programs (2009)
  • Author(s): S. Michimasa
  • Organizer: JUSEIPEN Workshop
  • Place of Presentation: LBNL, Berkeley, USA
• [Presentation] High-resolution spectroscopy using RI beams-SHARAQ project (2008)
  • Author(s): S. Shimoura
  • Organizer: New Paradigms in Nuclear Physics
  • Place of Presentation: フランスポアンカレ研究所
  • Year and Date: 2008-09-30
• [Presentation] High-resolution spectroscopyusing direct reactions of RI beams (2008)
  • Author(s): S. Shimoura
  • Organizer: The 6th Italy-Japan Symposium on Heavy IonPhysics
  • Place of Presentation: Tokai, Ibaraki, Japan
• [Presentation] Low-pressure tracking detectors for SHARAQ, ICHOR-EFES Inte. Symp (2008)
  • Author(s): S. Michimasa
  • Organizer: New Facet of Spin-IsospinResponses(SIR2008)
  • Place of Presentation: RIKEN, Wako, Japan
• [Presentation] High-resolution spectroscopy using RI beams-SHARAQ project (2008)
  • Author(s): S. Shimoura
  • Organizer: Japanese French Symposium on New paradigmsin Nuclear Physics
  • Place of Presentation: Institut Henri Poincare, Paris, France
• [Presentation] Focal plane and beamline detectors of SHARAQ (2008)
  • Author(s): S. Michimasa
  • Organizer: TORIJIN-EFES-FJNSPLIA Joint Workshop on Next GenerationDetector System for Nuclear Physics withRI beams
  • Place of Presentation: GANIL, Caen, France
• [Presentation] Direct reactions of Borromean nuclei (2007)
  • Author(s): S. Shimoura
  • Organizer: International Symposiumon New Facet of Three Nucleon Force-50years of Fujita-Miyazawa Three NucleonForce-(FM50)
  • Place of Presentation: Univ. of Tokyo, Tokyo, Japan
• [Remarks]
  • URL: http://www.cns.s.u-tokyo.ac.jp/~shimoura/
• [Remarks]
  • URL: http://www.cns.s.u-tokyo.ac.jp/sharaq/