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Population kinetics of long-lived metastable states in multiply charged ions

Research Project

Project/Area Number 16H04028
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionThe University of Electro-Communications

Principal Investigator

Nakamura Nobuyuki  電気通信大学, レーザー新世代研究センター, 准教授 (50361837)

Co-Investigator(Kenkyū-buntansha) 加藤 太治  核融合科学研究所, ヘリカル研究部, 准教授 (60370136)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Keywords多価イオン / ポピュレーションキネティクス / 準安定状態 / 原子時計 / ポピュレーショントラッピング / 原子・分子物理
Outline of Final Research Achievements

The mechanism of the “lost resonance lines” in promethiumlike ions, which have been three-decades-old question, has been clarified by studying time evolution of the population of a long-lived metastable state both experimentally and theoretically. Visible transitions in open-4f-shell multiply charged ions that are proposed to be used in a new type of atomic clock have been observed and identified. Spontaneous electric octupole transitions have been observed for the first time, and the emission mechanism has been clarified through population kinetics analysis.

Academic Significance and Societal Importance of the Research Achievements

太陽コロナや熱核融合実験炉などの高温プラズマの研究では、その状態を発光スペクトルから探る分光診断が重要である。本研究は、その発光スペクトルの理解の鍵となるポピュレーション(占有密度、プラズマ中粒子の状態分布)のキネティクス(速度論、時間発展)に関して新たな知見を与えた。また、新しい原子時計により物理定数の時間的変動を高感度に調べるという挑戦的な課題が提案されているが、そのために有用とされている多価イオンの発光スペクトルを調べ、将来の原子時計構築に有用な知見を得た。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (28 results)

All 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (21 results) (of which Int'l Joint Research: 9 results,  Invited: 4 results) Remarks (1 results)

  • [Int'l Joint Research] University of Delaware/Joint Quantum Institute/University of Nevada(米国)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Extreme ultraviolet spectra of multiply charged tungsten ions2017

    • Author(s)
      Momoe Mita, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, and Nobuyuki Nakamura
    • Journal Title

      Journal of Physics: Conf. Series

      Volume: 875 Pages: 012019-012019

    • DOI

      10.1088/1742-6596/875/2/012019

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Visible transitions in Ag-like and Cd-like lanthanide ions2017

    • Author(s)
      Shunichi Murata, Takayuki Nakajima, Marianna S. Safronova, Ulyana I. Safronova, and Nobuyuki Nakamura
    • Journal Title

      Physical Review A

      Volume: 96 Issue: 6 Pages: 062506-062506

    • DOI

      10.1103/physreva.96.062506

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Population trapping: The mechanism for the lost resonance lines in Pm-like ions2017

    • Author(s)
      Kato Daiji、Sakaue Hiroyuki A.、Murakami Izumi、Nakamura Nobuyuki
    • Journal Title

      Nucl. Instrum. Methods B

      Volume: 408 Pages: 16-20

    • DOI

      10.1016/j.nimb.2017.05.029

    • NAID

      120007180046

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Visible spectra of highly charged holmium ions observed with a compact electron beam ion trap2017

    • Author(s)
      Takayuki Nakajima, Kunihiro Okada, Michiharu Wada, Vladimir A. Dzuba, Marianna S. Safronova, Ulyana I. Safronova, Noriaki Ohmae, Hidetoshi Katori, Nobuyuki Nakamura
    • Journal Title

      TakayukiNakajimaaKunihiroOkadabMichiharuWadacVladimir A.DzubadMarianna S.SafronovaefUlyana I.SafronovagNoriakiOhmaehijHidetoshiKatorihijkNobuyukiNakamura

      Volume: 408 Pages: 118-121

    • DOI

      10.1016/j.nimb.2017.03.135

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct Observation of the M1 Transition between the Ground Term Fine Structure Levels of W VIII2017

    • Author(s)
      M. Mita, H.A. Sakaue, D. Kato, I. Murakami, and N. Nakamura
    • Journal Title

      Atoms

      Volume: 5 Issue: 1 Pages: 131-5

    • DOI

      10.3390/atoms5010013

    • NAID

      120007191866

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 4f-5s電気八重極子遷移(E3)の観測とその強いZ依存性2018

    • Author(s)
      坂上裕之,加藤太治,村上泉,大橋隼人,中村信行
    • Organizer
      原子衝突学会第43回年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of a high temperature superconducting magnet for use in a cryogen-free electron beam ion trap2018

    • Author(s)
      Toshihiro Tamai, Hiroyuki A Sakaue, Yoshiro Terazaki, Nagato Yanagi and Nobuyuki Nakamura
    • Organizer
      19th International Conference Physics of Highly Charged Ions (HCI2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Visible spectra of heavy ions with an open 4f shell2018

    • Author(s)
      Shunichi Murata, Takayuki Nakajima, Marianna S. Safronova, Ulyana I. Safronova, and Nobuyuki Nakamura
    • Organizer
      19th International Conference Physics of Highly Charged Ions (HCI2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of electric octupole (E3) transitions in the EUV spectra of tungsten ions2018

    • Author(s)
      H. A. Sakaue, D. Kato, I. Murakami, H. Ohashi and N. Nakamura
    • Organizer
      19th International Conference Physics of Highly Charged Ions (HCI2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Visible spectra of multiply charged heavy ions obtained with a compact electron beam ion trap2018

    • Author(s)
      NAKAMURA Nobuyuki
    • Organizer
      The 7th China- Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Collisional and radiative processes of highly charged iron ions studied with an electron beam ion trap2018

    • Author(s)
      Nobuyuki Nakamura
    • Organizer
      2nd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Observation of 4f-5s Electric Octupole (E3) Transition in the EUV Spectrum of Ag-like Tungsten2018

    • Author(s)
      H. A. Sakaue, D. Kato, I. Murakami, H. Ohashi and N. Nakamura
    • Organizer
      13th International Symposium on Electron Beam Ion Sources and Traps (EBIST2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 4f開殻重元素イオンの可視域発光スペクトルの観測2017

    • Author(s)
      村田隼一、中島貴之、中村信行
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学(大阪府豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Time evolution measurements of an EBIT plasma2017

    • Author(s)
      M. Monobe, D. Kato, and N. Nakamura
    • Organizer
      China-Japan Collaborative Workshop on Stability and Transport of Edge Plasmas
    • Place of Presentation
      福州(中国)
    • Year and Date
      2017-03-03
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 4f開殻重元素イオンの可視域発光スペクトルの観測2017

    • Author(s)
      村田隼一, 中島貴之, Mariana S. Safronova, Ulyana I. Safronova, 中村信行
    • Organizer
      「原子分子過程研究と受動・能動分光計測の高度化のシナジー効果によるプラズマ科学の展開」研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] プロメチウム様イオン発光スペクトルの時間発展計測2017

    • Author(s)
      物部将士, 加藤太治, 中村信行
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 準安定状態へのポピュレーショントラップの時間発展計測2017

    • Author(s)
      物部将士、加藤太治、中村信行
    • Organizer
      原子衝突学会第42回年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 4f開殻重元素イオンの可視域発光スペクトルの観測2017

    • Author(s)
      村田隼一、中島貴之、Marianna S. Safronova、Ulyana I. Safronova、中村信行
    • Organizer
      原子衝突学会第42回年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Measurements of time-resolved EUV spectra for studying the population kinetics in an electron beam ion trap plasma2017

    • Author(s)
      Masashi Monobe, Daiji Kato, Nobuyuki Nakamura
    • Organizer
      30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX)
    • Related Report
      2017 Annual Research Report
  • [Presentation] Visible M1 transitions in 4f open shell heavy ions observed with an electron beam ion trap2017

    • Author(s)
      Shunichi Murata, Takayuki Nakajima, Marianna Safronova, Ulyana Safronova and Nobuyuki Nakamura
    • Organizer
      30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX)
    • Related Report
      2017 Annual Research Report
  • [Presentation] Collisional-radiative model for EUV spectra of Pm-like ions in EBIT2017

    • Author(s)
      Daiji Kato, Hiroyuki A. Sakaue, Izumi Murakami, and Nobuyuki Nakamura
    • Organizer
      30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX)
    • Related Report
      2017 Annual Research Report
  • [Presentation] Extreme ultraviolet spectra of multiply charged tungsten ions2017

    • Author(s)
      Momoe Mita, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami and Nobuyuki Nakamura
    • Organizer
      30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX)
    • Related Report
      2017 Annual Research Report
  • [Presentation] エルビウム多価イオンの発光線観測2016

    • Author(s)
      村田隼一、中島貴之、中村信行
    • Organizer
      原子衝突学会第41回年会
    • Place of Presentation
      富山大学(富山県・富山市)
    • Year and Date
      2016-12-10
    • Related Report
      2016 Annual Research Report
  • [Presentation] 小型電子ビームイオントラップによる重元素多価イオンの極端紫外分光2016

    • Author(s)
      加藤弘行, 岸良子文, Safdar Ali, Emma Sokell, John Sheil, 中村信行
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学(石川県金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Observation of visible and EUV emission spectra of tungsten ions2016

    • Author(s)
      M. Mita and N. Nakamura
    • Organizer
      The 6th China-Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2016)
    • Place of Presentation
      成都(中国)
    • Year and Date
      2016-07-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spectroscopy of multiply charged ions with a compact EBIT at UEC Tokyo2016

    • Author(s)
      N. Nakamura
    • Organizer
      The 6th International Seminar on Physics at EBITs and Advanced Research Light Sources (PEARL2016)
    • Place of Presentation
      上海(中国)
    • Year and Date
      2016-06-10
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 中村信行研究室ホームページ

    • URL

      http://yebisu.ils.uec.ac.jp/nakamura/

    • Related Report
      2016 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2022-01-28  

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