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2010 Fiscal Year Final Research Report

Collectivity of neutron-rich carbon isotopes and the emergence of proton magic number

Research Project

  • PDF
Project/Area Number 20740163
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOsaka University

Principal Investigator

ONG Hooijin  Osaka University, 核物理研究センター, 助教 (80462670)

Project Period (FY) 2008 – 2010
Keywords不安定核 / 中性子過剰核 / 四重極集団運動 / 魔法数 / 陽子分布半径 / 荷電変化断面積
Research Abstract

We have observed dissimilar response to perturbation of the protons and neutrons in the neutron-rich carbon isotopes ^<16,18>C, hitherto unobserved in the atomic nuclei close to the stability line. This phenomenon is beyond the common knowledge of nuclear physics, which was formulated mainly from studies on nuclei in the neighborhood of stability line. While some theories have attributed this anomaly to emergence of a new proton magic number, i.e. proton number 6, in the neutron-rich isotopes ^<16,18>C, it remains to be proven whether the new proton magic number does emerge. To examine this new-proton-magic-number hypothesis, and to explore possibility of other neighboring nuclei showing similar behavior, we have developed a new experimental method to determine the proton distribution radii.

  • Research Products

    (18 results)

All 2010 2009 2008 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (8 results) Remarks (2 results)

  • [Journal Article] First lifetime measure- ment of 2_1^+ state in 12Be2009

    • Author(s)
      N.Imai, H.J.Ong (他39名、3番目)
    • Journal Title

      Physics Letters B 673

      Pages: 179

    • Peer Reviewed
  • [Journal Article] Observation/confirmationof hindered E2 strength in ^<18>C/^<16>C2009

    • Author(s)
      H.J.Ong, N.Imai (他23名、1番目)
    • Journal Title

      European Physical Journa A 第42巻

      Pages: 393-396

    • Peer Reviewed
  • [Journal Article] Confirmation/ Observation of hindered E2 strength in ^<16,18>C2009

    • Author(s)
      H.J.Ong, N.Imai (他23名、1番目)
    • Journal Title

      Nuclear Physics ReviSupplement 第26巻

      Pages: 70-76

    • Peer Reviewed
  • [Journal Article] Anomalously hindered E2 strengths in ^<16,18>C2009

    • Author(s)
      H.J.Ong, N.Imai (他23名、1番目)
    • Journal Title

      International Journal of ModPhysics A 第24巻

      Pages: 2168-2174

    • Peer Reviewed
  • [Journal Article] Lifetime measurements of 2_1^+ states in ^<16,18>C2008

    • Author(s)
      H.J.Ong, N.Imai (他23名、1番目)
    • Journal Title

      Physical Review C 第78巻

      Pages: 014308-1-014308-11

    • Peer Reviewed
  • [Journal Article] Lifetime measurements of excited states in ^<17>C : Possible interplay between collectivity and halo effects2008

    • Author(s)
      D.Suzuki, H.J.Ong (他23名、3番目)
    • Journal Title

      Physics Letters B 第666巻

      Pages: 222-227

    • Peer Reviewed
  • [Journal Article] Unbound excited statein ^<19,17>C2008

    • Author(s)
      Y.Satou,H.J.Ong (他28名、19番目)
    • Journal Title

      Physics Letters B 第660巻

      Pages: 320-325

    • Peer Reviewed
  • [Journal Article] One-neutron removal reactions of ^<18>C and ^<19>C on a proto target2008

    • Author(s)
      Y.Kondo, H.J.Ong (他32名、2番目)
    • Journal Title

      PhysicaReview C 第79巻

      Pages: 014602-1-014602-7

    • Peer Reviewed
  • [Presentation] 荷電変化断面積測定によるLi~C同位体の荷電半径の研究2010

    • Author(s)
      王惠仁
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学(岡山市)
    • Year and Date
      2010-03-23
  • [Presentation] Anomauslyi hindered E2 strengtin ^<16,18>C2008

    • Author(s)
      H.J.ng
    • Organizer
      Interfacing Structure and Reactions ate Centre of Atom (Kernz08)
    • Place of Presentation
      Millennium Hotel Queenstow, New Zealand
    • Year and Date
      2008-12-03
  • [Presentation] Anomalously hindered E2 strengths in ^<16,18>C2008

    • Author(s)
      H.J.Ong
    • Organizer
      Kanto Gakuin University Yokohama Autumn School of Nuclear Physics
    • Place of Presentation
      関東学院大学(横浜)
    • Year and Date
      2008-10-09
  • [Presentation] Observation/confirma-tion of hindered E2 strength in ^<18>C/^<16>C2008

    • Author(s)
      H.J.Ong
    • Organizer
      The Fifth InternationalConference on Exotic Nuclei and Atomic Masses (ENAM08)
    • Place of Presentation
      Ryn Hotel Ryn, Poland
    • Year and Date
      2008-09-09
  • [Presentation] ^<16,18>Cの第一2^+励起状態の寿命測定2008

    • Author(s)
      H.J.Ong
    • Organizer
      阪大RCNP不安定核研究会
    • Place of Presentation
      大阪大学(大阪)
    • Year and Date
      2008-08-08
  • [Presentation] ^<16,18>Cの第一2^+励起状態の寿命測定2008

    • Author(s)
      H.J.Ong
    • Organizer
      京大基研研究会
    • Place of Presentation
      京都大学(京都)
    • Year and Date
      2008-07-04
  • [Presentation] Confirmation/Observa- tion of d E2 th in ^<16,18>C2008

    • Author(s)
      H.J.Ong
    • Organizer
      The Third China-Japan-Korea Hadron and Nuclear Physics 2008 Symposium (HNP08)
    • Place of Presentation
      Institute of Modern Phy
    • Year and Date
      2008-06-24
  • [Presentation] Confirmation/Observa- tion of ered E2 stth in ^<16,18>C2008

    • Author(s)
      H.J.Ong
    • Organizer
      CNS-RIKEN Jont InternatioSium on Frontier of Gamma-ray Spectrosc and Perspectves for Nuclear Structure Studies (Gamma08),
    • Place of Presentation
      理化学研究所(埼玉県光市)
    • Year and Date
      2008-04-05
  • [Remarks] ホームページ等発表リス

    • URL

      http://www.rcnp.osaku-u.ac.jp/~onghjin/publist.html

  • [Remarks] 国際会議で発表したポスター:^<16,18>異常抑制

    • URL

      http://www.rcnp.osaka-u.ac.jp/~onghjin/pub/kernz08poster_ong.pdf

URL: 

Published: 2012-02-13   Modified: 2016-04-21  

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