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反応理論を用いた中性子過剰核の構造の記述

Research Project

Project/Area Number 16740139
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

萩野 浩一  東北大学, 大学院・理学研究科, 助教授 (20335293)

Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywords不安定原子核 / 対相関相互作用 / 双中性子相関 / BCS-BECクロスオーバー / 3体模型 / 変形パラメーター / 二重畳み込みポテンシャル / ニュートリノ-原子核反応 / 共鳴状態 / 重イオン準弾性散乱 / 結合チャンネル法 / 変形ポテンシャル / 双極子励起 / 半古典法 / トンネル現象 / HFB法 / 陽子放出崩壊
Research Abstract

本研究の目的は、弱く束縛した不安定原子核の構造と反応を統一的に記述する試みを行うことである。これに関連して、今年度は以下に記す研究実績を得た。
1.原子核の四重極能率と変形パラメーターの関係に関する考察を行い、中性子過剰核のように表面領域が大きい場合に有効な新しい関係式を導出した。
2.3体模型を用いて16C核の構造を記述した。この模型を用いて16C核の四重極励起エネルギー、遷移強度、半径、分解反応に関する実験データを統一的に再現することに成功した。
3.3体模型を用いたハロー核の記述を行い、その3体波動関数を精査した。特に、双中性子相関とBCS-BECクロスオーバー現象との関連性を議論し、一般的にハロー核において2つの中性子が空間的にコンパクトな形状をとり核表面付近に存在することを明らかにした。
4.重イオン散乱でよく使われる二重畳み込みポテンシャルにおいて、核子交換効果に対する新しい近似法を提唱した。この近似法は系が重い場合に成り立っものであり、その近似の妥当性を数値計算によって確かめた。
5.r-プロセス元素合成におけるニュートリノ-原子核反応に対する環境電子の効果を議論した。これには環境電子による遮蔽効果およびパウリ原理の効果が含まれるが、双方の効果とも反応断面積を減少させることを明らかにした。

Report

(3 results)
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (27 results)

All 2007 2006 2005 2004 Other

All Journal Article (27 results)

  • [Journal Article] Three-body model calculations for the 16C nucleus2007

    • Author(s)
      K.Hagino, H.Sagawa
    • Journal Title

      Phys. Rev. C 75

    • NAID

      120000775730

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Effect of electronic environment on neutrino-nucleus reactions at r-process sites2007

    • Author(s)
      F.Minato, K.Hagino, N.Takigawa, A.B.Balantekin, Ph.Chomaz
    • Journal Title

      Phys. Rev. C 75

    • NAID

      120000775731

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Recent developments in quasi-elastic scattering around the Coulomb barrier2007

    • Author(s)
      K.Hagino
    • Journal Title

      AIP conference proceedings 891

      Pages: 80-88

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Screening effects on neutrino-nucleus reactions2007

    • Author(s)
      F.Minato, K.Hagino, N.Takigawa, A.B.Balantekin, Ph.Chomaz
    • Journal Title

      AIP conference proceedings 891

      Pages: 401-404

    • NAID

      120002069863

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Disentangling the reaction mechanisms of weakly bound nuclei2006

    • Author(s)
      P.R.S.Gomes, K.Hagino, 他16名
    • Journal Title

      Phys. Lett. B 634

      Pages: 356-361

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Comprehensive study of reaction mechanisms for the 9Be+144Sm system at near- and sub-barrier energies2006

    • Author(s)
      P.R.S.Gomes, K.Hagino, 他17名
    • Journal Title

      Phys. Rev. C 73

    • NAID

      120000775727

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Deformation parameter for diffuse density2006

    • Author(s)
      K.Hagino, N.W.Lwin, M.Yamagami
    • Journal Title

      Phys. Rev. C 74

    • NAID

      120000775728

    • Related Report
      2006 Annual Research Report
  • [Journal Article] No-recoil approximation to knock-on exchange potential in the double folding model for heavy-ion collisions2006

    • Author(s)
      K.Hagino, T.Takehi, N.Takigawa
    • Journal Title

      Phys. Rev. C 74

    • NAID

      120000775729

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Probing internucleus potential with large-angle quasi-elastic scattering2006

    • Author(s)
      K.Hagino, K.Washiyama
    • Journal Title

      AIP conference proceedings 853

      Pages: 86-93

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Sub-barrier fusion cross section with energy density formalism2006

    • Author(s)
      Muhammad Zamrun F., K.Hagino, N.Takigawa
    • Journal Title

      AIP conference proceedings 853

      Pages: 309-314

    • NAID

      120002069860

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Large-angle quasi-elastic scattering around the Coulomb barrier2006

    • Author(s)
      K.Hagino
    • Journal Title

      AIP conference proceedings 865

      Pages: 10-15

    • Related Report
      2006 Annual Research Report
  • [Journal Article] An extra push from entrance-channel effects2006

    • Author(s)
      N.Rowley, N.Grar, K.Hagino
    • Journal Title

      Physics Letters B 632

      Pages: 243-246

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Surface diffuseness anomaly in heavy-ion potentials for large-angle quasielastic scattering2005

    • Author(s)
      K.Hagino, T.Takeshi, A.B.Balantekin, N.Takigawa
    • Journal Title

      Physical Review C 71

    • NAID

      120000775723

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Absence of structure in the 20, 22Ne + 118Sn quasi-elastic barrier distribution2005

    • Author(s)
      E.Piasecki, K.Hagino他14名
    • Journal Title

      Physics Letters B 615

      Pages: 55-60

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Pairing correlations in nuclei on the neutron-drip line2005

    • Author(s)
      K.Hagino, H.Sagawa
    • Journal Title

      Physical Review C 72

    • NAID

      120000775721

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Role of low-1 component in deformed wave functions near the continuum threshold2005

    • Author(s)
      K.Yoshida, K.Hagino
    • Journal Title

      Physical Review C 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Study of fine structure in the proton radioactivity of 146Tm2005

    • Author(s)
      J.C.Batchelder, K.Hagino他18名
    • Journal Title

      Euro.Phys.Journal・A 25

    • NAID

      120002069887

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Stucture of rare-earth nuclei around the proton drip line2005

    • Author(s)
      K.P.Rykaczewski, K.Hagino他18名
    • Journal Title

      AIP Conference Proceedings 764

      Pages: 223-228

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Nuclear structure studies at the proton drip line via proton radioactivity studies2005

    • Author(s)
      C.R.Bingham, K.Hagino他18名
    • Journal Title

      Nucl.Instrum.Methods Phys.Res.B 241

      Pages: 185-189

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Perturbative HFB model for many-body pairing correlations2005

    • Author(s)
      K.Hagino, H.Sagawa
    • Journal Title

      Physical Review C (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Quasi-elastic barrier distribution as a tool for investigating Unstable nuclei2005

    • Author(s)
      K.Hagino, N.Rowley
    • Journal Title

      Brazilian Journal of Physics (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Study of fine structure in the proton radioactivity of 146Tm2005

    • Author(s)
      J.C.Batchelder, K.Hagino, 他19名
    • Journal Title

      European Physics Journal A (印刷中)

    • NAID

      120002069887

    • Related Report
      2004 Annual Research Report
  • [Journal Article] WKB approximation for multi-channel barrier penetrability2004

    • Author(s)
      K.Hagino, A.B.Balantekin
    • Journal Title

      Physical Review A 70

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Indication of BCS-BEC crossover behavior in halo nuclei

    • Author(s)
      K.Hagino, H.Sagawa, J.Carbonell, P.Schuck
    • Journal Title

      Phys. Rev. Lett. (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements

    • Author(s)
      A.Mukherjee, D.J.Hinde, M.Dasgupta, K.Hagino, J.O.Newton, R.D.Butt
    • Journal Title

      Phys. Rev. C (印刷中)

    • NAID

      120000775732

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Systematic of isomeric configurations in N=77 odd-Z isotones near the proton drip line

    • Author(s)
      M.N.Tantawy, K.Hagino他22名
    • Journal Title

      Physical Review C (印刷中)

    • NAID

      120000775725

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Probing surface diffuseness of nucleus-nucleus potential with quasielastic scattering at deep sub-barrier energies

    • Author(s)
      K.Hagino, K.Washiyama, M.Dasgupta
    • Journal Title

      Physical Review C (印刷中)

    • NAID

      120000775726

    • Related Report
      2005 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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