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Development of high efficient gas cell for collecting the r-process nuclei around N=126 and producing the high purity beam of the nuclei

Research Project

Project/Area Number 24740180
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

HIRAYAMA Yoshikazu  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, 助教 (30391733)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords国際情報交換 / ベルギー / 元素合成 / アルゴンガスセル / レーザー共鳴イオン化 / ガスセル
Research Abstract

By measuring the half-lives of neutron-rich radioactive nuclei with N=126, it is considered that it is possible to understand the process of nucleosynthesis of heavy elements by a rapid neutron-capture reaction in the cosmos. In order to understand the process, we have developed an argon gas-cell with laser ionization for producing an element- and mass-selected radioactive ion beam. The design of a gas cell was optimized by using a flow simulation. The basic property of the gas cell was investigated from the off-line test using a filament placed in the gas cell and from the on-line test using an accelerated beam at RIKEN facility. We have successfully produced an element- and mass-selected ion beam, whose extraction time of about 200 ms was faster than the gas cell produced so far. Owing to the gas cell, we can measure the half-lives of the radioactive nuclei with N=126 for understanding the element synthesis in the cosmos.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (21 results)

All 2014 2013 2012 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (13 results) (of which Invited: 6 results) Remarks (3 results)

  • [Journal Article] Ionization cross section measurements for autoionizing states of iridium and rhenium2014

    • Author(s)
      Hirayama Y., Mukai M., Watanabe Y., Imai N., Ishiyama H., Jeong S.-C., Miyatake H., Oyaizu M., Matsuo Y., Sonoda T., Wada M
    • Journal Title

      J. Physics B

      Volume: 47 Issue: 7 Pages: 0752011-8

    • DOI

      10.1088/0953-4075/47/7/075201

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Present Status of KEK Isotope Separation System2014

    • Author(s)
      Y. Hirayama(計14名)
    • Journal Title

      European Physical Journal Web conference

      Volume: 66巻 Pages: 110171-4

    • DOI

      10.1051/epjconf/20146611017

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] In-gas-cell laser ion source for KEK isotope separation system2014

    • Author(s)
      M. Mukai, Y. Hirayama(計9名)
    • Journal Title

      Review of Scientific Instrument

      Volume: 85巻

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Off-line test of the KISS gas cell2013

    • Author(s)
      Hirayama Y.,Watanabe Y.X., Imai N., Ishiayma H., Jeong S.C., Miyatake H., Oyaizu M., Kim Y.H., Mukai M., Matsuo Y., Sonoda T., Wada M., Mark H., Kudryavstev Y., Van Duppen P
    • Journal Title

      Nucl. Instrum. Meth

      Volume: 317 Pages: 480-483

    • DOI

      10.1016/j.nimb.2013.06.032

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Study of collisions of 136Xe + 198Pt for the KEK isotope separator2013

    • Author(s)
      Watanabe Y.X., Hirayama Y., Imai N., Ishiyama H., Jeong S.C., Miyatake H., Clement E., de France G., Navin A., Rejmund M., Schmit C., Pollarolo G., Corradi L., Fioretto E., Motanari D., Choi S.H., Kim Y.H., Song J.S., Niikura M., Suzuki D., Nishibata H., Takatsu J.
    • Journal Title

      Nucl. Instrum. Meth

      Volume: B 317 Pages: 752-755

    • DOI

      10.1016/j.nimb.2013.04.036

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Presentation] beta-decay spectroscopy of r-process nuclei with N=126 at KISS2013

    • Author(s)
      Y. Hirayama
    • Organizer
      The 12^<th> International Symposium on Origin of Matter and Evolution of Galaxies
    • Place of Presentation
      つくば国際会議場
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] Development of KEK Isotope Separation System I2013

    • Author(s)
      平山賀一
    • Organizer
      日本物理学会
    • Place of Presentation
      高知大学朝倉キャンパス
    • Related Report
      2013 Annual Research Report 2013 Final Research Report
  • [Presentation] Development of the KISS ga cell2013

    • Author(s)
      Y. Hirayama
    • Organizer
      The 11^<th> IGISOL Workshop
    • Place of Presentation
      ユバスキュラ大学(フィンランド)
    • Related Report
      2013 Final Research Report
  • [Presentation] Present status of the KEK isotope separation system2013

    • Author(s)
      Y. Hirayama
    • Organizer
      The 25^<th> International Nuclear Physics Conference (INPC2013)
    • Place of Presentation
      フィレンツェ国際会議場(イタリア)
    • Related Report
      2013 Final Research Report
  • [Presentation] beta-decay spectroscopy of r-process nuclei with N=126 at KISS2013

    • Author(s)
      平山 賀一
    • Organizer
      The 12th International Symposium on Origin of Matter and Evolution of Galaxies
    • Place of Presentation
      つくば国際会議場
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Development of the KISS gas cell2013

    • Author(s)
      平山 賀一
    • Organizer
      The 11th IGISOL Workshop (Conference on Stopping and Manipulation of Ions, SMI-13)
    • Place of Presentation
      ユバスキュラ大学(フィンランド)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Present status of the KEK isotope separation system2013

    • Author(s)
      平山 賀一
    • Organizer
      The 25th International Nuclear Physics Conference (INPC2013)
    • Place of Presentation
      FIRENZE (ITALY)
    • Related Report
      2013 Annual Research Report
  • [Presentation] On and Off-line test results of the KISS gas cell2012

    • Author(s)
      Y. Hirayama
    • Organizer
      Workshop on low-energy radioactive isotope beam production by in-gas laser ionization for decay spectroscopy at RIKEN
    • Place of Presentation
      理化学研究所
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] On and Off-line test results of the KISS gas cell2012

    • Author(s)
      Y. Hirayama
    • Organizer
      The 16^<th> IUPAPA International conference on electromagnetic isotope separators and techniques related to their applications (EMIS2012)
    • Place of Presentation
      松江くにびきメッセ
    • Related Report
      2013 Final Research Report
  • [Presentation] Spectroscopy of r-process nuclei with N=126 by KISS2012

    • Author(s)
      Y. Hirayama
    • Organizer
      Workshop on"Gas-cell-based laser ionization spectroscopy developments"
    • Place of Presentation
      ルーバンカトリック大学(ベルギー)
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] Spectroscopy of r-process nuclei with N=126 by KISS2012

    • Author(s)
      Y. Hirayama
    • Organizer
      Workshop on “Gas-Cell-based Laser Ionization Spectroscopy Developments”
    • Place of Presentation
      KU Leuven, Belgium
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] On and Off-line test results of the KISS gas cell2012

    • Author(s)
      Y. Hirayama
    • Organizer
      The 16th IUPAP International Conference on Electromagnetic Isotope Separators and Techniques Related to Their Applications (EMIS2012)
    • Place of Presentation
      Matsue, Japan
    • Related Report
      2012 Research-status Report
  • [Presentation] On and Off-line test results of the KISS gas cell2012

    • Author(s)
      Y. Hirayama
    • Organizer
      Workshop on Low-Energy Radioactive Isotope Beam (RIB) Production by In-Gas Laser Ionization for Decay Spectroscopy at RIKEN
    • Place of Presentation
      RIKEN, Japan
    • Related Report
      2012 Research-status Report
    • Invited
  • [Remarks]

    • URL

      http://kekrnb.kek.jp

    • Related Report
      2013 Final Research Report
  • [Remarks] KEK 短寿命核グループのホームページ

    • URL

      http://kekrnb.kek.jp

    • Related Report
      2013 Annual Research Report
  • [Remarks] KEK短寿命核グループ

    • URL

      http://kekrnb.kek.jp/

    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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