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Double-beta-decay process of Calcium-48

Research Project

Project/Area Number 19740123
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

YAKO Kentaro  The University of Tokyo, 大学院・理学系研究科, 助教 (50361572)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥1,150,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥500,000 (Direct Cost: ¥500,000)
Keywords二重ベータ崩壊 / 荷電交換反応 / 中性子ビーム / 多重極展開 / ガモフ・テラー遷移 / ガモフ・テラー共鳴状態
Research Abstract

二重ベータ崩壊核カルシウム48の2ニュートリノ二重ベータ崩壊過程の理解を目的に、その核遷移行列を決めているガモフ・テラー遷移強度分布を測定した。娘核チタン48から中間核スカンジウム48へのガモフ・テラー遷移強度は、従来の殻模型計算の予言と比べ、より高い励起領域にまで分散・分岐している、という結果を得た。このことは、現在の殻模型では二重ベータ崩壊過程の核行列を十分に理解できないことを示している。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (13 results)

All 2008 2007

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (11 results)

  • [Journal Article] RCNP (n, p) facility2008

    • Author(s)
      K. Yako, H. Sakai, M. B. Greenfield, K. Hatanaka, M. Hatano, J. Kamiya, Y. Maeda, K. Nagayama, H. Okamura, K. Sekiguchi, Y. Shimizu, K. Suda, A. Tamii, and T. Wakasa
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A 592

      Pages: 88-99

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] The RCNP (n, p) facility2008

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

      Nuclear Instruments and Methods in Physics Research A 592

      Pages: 88-99

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Study of nuclear matrix elements of two-neutrino double-beta-decay by (p, n) and (n, p) reactions2008

    • Author(s)
      K. Yako
    • Organizer
      The 6^<th> Italy-Japan symposium on heavy ion physics
    • Place of Presentation
      東海村
    • Year and Date
      2008-11-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Study of nuclear matrix elements of two-neutrino double beta-decay by (p, n) and (n, p) reactions2008

    • Author(s)
      K. Yako
    • Organizer
      ICHO-EFES international symposium on new facet of spin-isospin responses
    • Place of Presentation
      Nishina Center, RIKEN
    • Year and Date
      2008-10-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Study of Nuclear matrix elements of two-neutrino double-beta-decay by (p, n) and (n, p) reactions2008

    • Author(s)
      K. Yako
    • Organizer
      ICHO-EFES international symposium on new facet of spin-isospin responses
    • Place of Presentation
      理化学研究所
    • Year and Date
      2008-10-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] (p,n)/(n,p)反応による2ν二重ベータ崩壊の核行列要素2008

    • Author(s)
      矢向謙太郎
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] (p, n)/(n, p)反応による2γ二重ベータ崩壊の核行列要素2008

    • Author(s)
      矢向謙太郎
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] Study of the 2-neutrino double-beta-decay process of ^<48>Ca and ^<116>Cd by (p, n) (n, p) reactions2008

    • Author(s)
      K. Yako
    • Organizer
      Annual meeting of European network of theoretical astroparticle physics on physics of massive neutrinos
    • Place of Presentation
      Milos Island, Greece
    • Year and Date
      2008-05-22
    • Related Report
      2008 Final Research Report
  • [Presentation] Study of the 20neutrino double-beta-decay process of 48Ca and 116Cd by (p, n) (n, p) reactions2008

    • Author(s)
      K. Yako
    • Organizer
      Annual meeting of European network of the oretical astroparticle physics on physics of massive neutrinos
    • Place of Presentation
      ミロス島、ギリシャ
    • Year and Date
      2008-05-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] ^<48>Ti(n,p)^<48>Sc反応による^<48>Ca二重β崩壊過程の研究2008

    • Author(s)
      三木謙二郎、酒井英行、笹野匡紀、野地俊平、矢向謙太郎
    • Organizer
      日本物理学会第63回年回
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-30
    • Related Report
      2008 Final Research Report
  • [Presentation] <48>^Ti (n,p) <48>^Sc反応による48Ca二重β崩壊過程の研究2008

    • Author(s)
      三木 謙二郎
    • Organizer
      日本物理学会第63回年会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] Intermediate states of double beta decay nuclei studied by (p, n) and (n, p) reactions2007

    • Author(s)
      K. Yako
    • Organizer
      Japan-German workshop on nuclear structure and astrophysics
    • Place of Presentation
      Chiemsee, Germany
    • Year and Date
      2007-10-01
    • Related Report
      2008 Final Research Report
  • [Presentation] Intermediate states of double-beta decay nuclei studied by (p,n) and (n,p) reactions2007

    • Author(s)
      K. Yako
    • Organizer
      3rd Japanese-German EFES (JSPS)-DFG/GSI workshop on Nuclear Structure and Astrophysics
    • Place of Presentation
      キームぜー、ドイツ
    • Year and Date
      2007-10-01
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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