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Study of the origin of heavy elements using an innovative mass spectrograph

Research Project

Project/Area Number 17H06090
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Mathematics and Physics
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

Wada Michiharu  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, 教授 (50240560)

Co-Investigator(Kenkyū-buntansha) 森本 幸司  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, チームリーダー (00332247)
加治 大哉  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 上級技師 (00391912)
宮武 宇也  大学共同利用機関法人高エネルギー加速器研究機構, その他部局等, シニアフェロー (50190799)
石山 博恒  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, チームリーダー (50321534)
小浦 寛之  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 室長 (50391264)
羽場 宏光  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 室長 (60360624)
岸本 忠史  大阪大学, 核物理研究センター, 特任教授 (90134808)
西村 俊二  国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 先任研究員 (90272137)
Project Period (FY) 2017-04-25 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥555,230,000 (Direct Cost: ¥427,100,000、Indirect Cost: ¥128,130,000)
Fiscal Year 2021: ¥47,190,000 (Direct Cost: ¥36,300,000、Indirect Cost: ¥10,890,000)
Fiscal Year 2020: ¥106,600,000 (Direct Cost: ¥82,000,000、Indirect Cost: ¥24,600,000)
Fiscal Year 2019: ¥96,980,000 (Direct Cost: ¥74,600,000、Indirect Cost: ¥22,380,000)
Fiscal Year 2018: ¥206,050,000 (Direct Cost: ¥158,500,000、Indirect Cost: ¥47,550,000)
Fiscal Year 2017: ¥98,410,000 (Direct Cost: ¥75,700,000、Indirect Cost: ¥22,710,000)
Keywords元素の起源 / 質量測定 / イオントラップ / MRTOF / r-過程 / 短寿命原子核 / 重元素の起源 / 超重元素 / 速い中性子捕獲過程 / MRTOF質量分光器 / MTOF質量分光器 / 高周波イオンガイド / α-ToF検出器 / 超重核 / 元素合成過程 / 原子核物理
Outline of Final Research Achievements

In this study, we have completed a system to efficiently measure the masses of a wide range of short-lived nuclei comprehensively and precisely. It is a key to the study of the synthesis process of heavy elements. The gas cell system and MRTOF mass spectrometer were installed at three of the short-lived nucleus beam sources located at the RIKEN accelerator facilities: GARIS, which is effective for superheavy elements, KISS, which specializes in neutron-rich nuclei of refractory elements, and BigRIPS-SLOWRI, which covers a wide range of nuclides lighter than uranium, to perform high-precision Mass measurements of all available nuclides at RIKEN RIBF. Over 400 nuclides have already been successfully measured, and we expect to reach 1,000 nuclides within a few years. This overwhelming data, together with related nuclear spectroscopic research, is expected to significantly advance the study of heavy elements' origin.

Academic Significance and Societal Importance of the Research Achievements

鉄より重い元素は通常の恒星内での融合反応では生成できず、爆発的な天体現象が必要な事がわかっている。最近の重力波等の観測に因れば、中性子星合体がその有力候補と考えられている。しかしその爆発的現象の素過程の理解は、普段自然に存在せずその特性が分かっていない短寿命で崩壊する原子核を経るため、確度の不十分な理論計算に依らざるを得ない。実験的に、関与する短寿命原子核の特性、とりわけその質量を網羅的に測定することが、重い元素の起源解明の鍵と考えられている。本研究はそれを大いに発展させる仕組みを作ったことに相当する。

Assessment Rating
Verification Result (Rating)

A-

Assessment Rating
Result (Rating)

A: Progress in the research is steadily towards the initial goal. Expected research results are expected.

Report

(12 results)
  • 2022 Research Progress Assessment (Verification Result) ( PDF )
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report   Abstract(Research Progress Assessment) ( PDF )   Research Progress Assessment (Result) ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report   Research Progress Assessment (Comments on the Site Visits) ( PDF )
  • 2017 Abstract ( PDF )   Comments on the Screening Results ( PDF )   Annual Research Report
  • Research Products

    (67 results)

All 2022 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (5 results) Journal Article (30 results) (of which Int'l Joint Research: 25 results,  Peer Reviewed: 30 results,  Open Access: 4 results) Presentation (25 results) (of which Int'l Joint Research: 22 results,  Invited: 23 results) Book (1 results) Remarks (6 results)

  • [Int'l Joint Research] Hong Kong University/IMP Lanzhou/Jinan University(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Institute of Basic Science(韓国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Hong Kong University/IMP Lanzhou/Jinan University(中国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] IBS(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Institute of Basic Science(韓国)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Ground-state β-decay spectroscopy of Ta-1872022

    • Author(s)
      Mukai M.、Hirayama Y.、Watanabe Y. X.、Watanabe H.、Koura H.、Jeong S. C.、Miyatake H.、Brunet M.、Ishizawa S.、Kondev F. G.、Lane G. J.、Litvinov Yu. A.、Niwase T.、Oyaizu M.、Podolyak Zs.、Rosenbusch M.、Schury P.、Wada M.、Walker P. M.
    • Journal Title

      Physical Review C

      Volume: 105 Issue: 3 Pages: 034331-034331

    • DOI

      10.1103/physrevc.105.034331

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First high-precision direct determination of the atomic mass of a superheavy nuclide2021

    • Author(s)
      Schury P.、Niwase T.、Wada M.、Brionnet P.、Chen S.、Hashimoto T.、Haba H.、Hirayama Y.、Hou D. S.、Iimura S.、Ishiyama H.、Ishizawa S.、Ito Y.、Kaji D.、Kimura S.、Koura H.、Liu J. J.、Miyatake H.、Moon J.-Y.、Morimoto K.、Morita K.、Nagae D.、Rosenbusch M.、Takamine A.、Watanabe Y. X.、Wollnik H.、Xian W.、Yan S. X.
    • Journal Title

      Physical Review C

      Volume: 104 Issue: 2

    • DOI

      10.1103/physrevc.104.l021304

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] First direct observation of isomeric decay in neutron-rich odd-odd Ta1862021

    • Author(s)
      Watanabe Y. X.、Walker P. M.、Hirayama Y.、Mukai M.、Watanabe H.、Lane G. J.、Ahmed M.、Brunet M.、Hashimoto T.、Ishizawa S.、Kimura S.、Kondev F. G.、Litvinov Yu. A.、Miyatake H.、Moon J. Y.、Niwase T.、Oyaizu M.、Park J. H.、Podolyk Zs.、Rosenbusch M.、Schury P.、Wada M.
    • Journal Title

      Physical Review C

      Volume: 104 Issue: 2 Pages: 024330-024330

    • DOI

      10.1103/physrevc.104.024330

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] α-decay-correlated mass measurement of Ra206, 207g,m using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system2021

    • Author(s)
      Niwase T.、Wada M.、Schury P.、Brionnet P.、Chen S. D.、Hashimoto T.、Haba H.、Hirayama Y.、Hou D. S.、Iimura S.、Ishiyama H.、Ishizawa S.、Ito Y.、Kaji D.、Kimura S.、Liu J.、Miyatake H.、Moon J. Y.、Morimoto K.、Morita K.、Nagae D.、Rosenbusch M.、Takamine A.、Tanaka T.、Watanabe Y. X.、Wollnik H.、Xian W.、Yan S. X.
    • Journal Title

      Physical Review C

      Volume: 104 Issue: 4 Pages: 044617-044617

    • DOI

      10.1103/physrevc.104.044617

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reduction of contaminants originating from primary beam by improving the beam stoppers in GARIS-II2021

    • Author(s)
      Kimura S.、Kaji D.、Ito Y.、Miyatake H.、Morimoto K.、Schury P.、Wada M.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 992 Pages: 164996-164996

    • DOI

      10.1016/j.nima.2020.164996

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional tracking multi-segmented proportional gas counter for β-decay spectroscopy of unstable nuclei2021

    • Author(s)
      Hirayama Y.、Schury P.、Mukai M.、Choi H.、Iimura S.、Watanabe Y.X.、Wada M.、Watanabe H.、Miyatake H.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 997 Pages: 165152-165152

    • DOI

      10.1016/j.nima.2021.165152

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Offline ion source for laser spectroscopy of RI at the SLOWRI2021

    • Author(s)
      Tajima M.、Takamine A.、Wada M.、Ueno H.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

      Volume: 486 Pages: 48-54

    • DOI

      10.1016/j.nimb.2020.10.013

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Beta decay of the axially asymmetric ground state of 192Re2021

    • Author(s)
      Watanabe H.、Watanabe Y.X.、Hirayama Y.、Andreyev A.N.、Hashimoto T.、Kondev F.G.、Lane G.J.、Litvinov Yu.A.、Liu J.J.、Miyatake H.、Moon J.Y.、Morales A.I.、Mukai M.、Nishimura S.、Niwase T.、Rosenbusch M.、Schury P.、Shi Y.、Wada M.、Walker P.M.
    • Journal Title

      Physics Letters B

      Volume: 814 Pages: 136088-136088

    • DOI

      10.1016/j.physletb.2021.136088

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nuclear spectroscopy of r-process nuclei using KEK Isotope Separation System2020

    • Author(s)
      Hirayama Y.、Watanabe Y.X.、Mukai M.、Ahmed M.、Ishiyama H.、Jeong S.C.、Kakiguchi Y.、Kimura S.、Moon J.Y.、Oyaizu M.、Park J.H.、Schury P.、Wada M.、Miyatake H.
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1643 Issue: 1 Pages: 012138-012138

    • DOI

      10.1088/1742-6596/1643/1/012138

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Properties of Ta187 Revealed through Isomeric Decay2020

    • Author(s)
      Walker P.M.、Hirayama Y.、Lane G.J.、Watanabe H.、Dracoulis G.D.、Ahmed M.、Brunet M.、Hashimoto T.、Ishizawa S.、Kondev F.G.、Litvinov Yu.A.、Miyatake H.、Moon J.Y.、Mukai M.、Niwase T.、Park J.H.、Podolyk Zs.、Rosenbusch M.、Schury P.、Wada M.、Watanabe X.Y.、Liang W.Y.、Xu F.R.
    • Journal Title

      Physical Review Letters

      Volume: 125 Issue: 19 Pages: 192505-192505

    • DOI

      10.1103/physrevlett.125.192505

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Accurately accounting for effects on times-of-flight caused by finite field-transition times during the ejection of ions from a storage trap: A study for single-reference TOF and MRTOF mass spectrometry2020

    • Author(s)
      Rosenbusch M.、Schury P.、Wada M.、Iimura S.、Ito Y.、Wollnik H.
    • Journal Title

      International Journal of Mass Spectrometry

      Volume: 456 Pages: 116346-116346

    • DOI

      10.1016/j.ijms.2020.116346

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In-gas-cell laser resonance ionization spectroscopy of Ir196,197,1982020

    • Author(s)
      Mukai M.、Hirayama Y.、Watanabe Y. X.、Schiffmann S.、Ekman J.、Godefroid M.、Schury P.、Kakiguchi Y.、Oyaizu M.、Wada M.、Jeong S. C.、Moon J. Y.、Park J. H.、Ishiyama H.、Kimura S.、Ueno H.、Ahmed M.、Ozawa A.、Watanabe H.、Kanaya S.、Miyatake H.
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 5 Pages: 054307-054307

    • DOI

      10.1103/physrevc.102.054307

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In-gas-cell laser ionization spectroscopy of Os194,196 isotopes by using a multireflection time-of-flight mass spectrograph2020

    • Author(s)
      Choi H.、Hirayama Y.、Choi S.、Hashimoto T.、Jeong S. C.、Miyatake H.、Moon J. Y.、Mukai M.、Niwase T.、Oyaizu M.、Rosenbusch M.、Schury P.、Taniguchi A.、Watanabe Y. X.、Wada M.
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 3 Pages: 034309-034309

    • DOI

      10.1103/physrevc.102.034309

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Model independent peak fitting and uncertainty assignment for high-precision time-of-flight mass spectrometry2020

    • Author(s)
      Chudinov Aleksey Vladimirovich、Rosenbusch Marco、Kozlovskiy Vyacheslav Ivanovich、Raznikov Valeriy Vladislavovich、Schury Peter、Wada Michiharu、Wollnik Hermann
    • Journal Title

      The Analyst

      Volume: 145 Issue: 9 Pages: 3401-3406

    • DOI

      10.1039/d0an00325e

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Deexcitation γ-ray transitions from the long-lived Iπ=13/2+ metastable state in Os1952020

    • Author(s)
      Watanabe Y. X.、Ahmed M.、Hirayama Y.、Mukai M.、Park J. H.、Schury P.、Kakiguchi Y.、Kimura S.、Ozawa A.、Oyaizu M.、Wada M.、Miyatake H.
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 4 Pages: 041305-041305

    • DOI

      10.1103/physrevc.101.041305

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of an “α-TOF” detector for correlated measurement of atomic masses and decay properties2020

    • Author(s)
      Niwase T.、Wada M.、Schury P.、Haba H.、Ishizawa S.、Ito Y.、Kaji D.、Kimura S.、Miyatake H.、Morimoto K.、Morita K.、Rosenbusch M.、Wollnik H.、Shanley T.、Benari Y.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 953 Pages: 163198-163198

    • DOI

      10.1016/j.nima.2019.163198

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nuclear spectroscopy of r-process nuclei using KEK Isotope Separation System2020

    • Author(s)
      Y. Hirayama, Y.X. Watanabe, M. Mukai, P. Schury, M. Ahmed, H. Ishiyama, S.C. Jeong, Y. Kakiguchi, S. Kimura, J.Y. Moon, M. Oyaizu, J.H. Park, M. Wada, H. Miyatake
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

      Volume: 463 Pages: 425-430

    • DOI

      10.1016/j.nimb.2019.04.035

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A new multi-reflection time-of-flight mass spectrograph for the SLOWRI facility2020

    • Author(s)
      Rosenbusch M.、Wada M.、Schury P.、Ito Y.、Ishiyama H.、Ishizawa S.、Hirayama Y.、Kimura S.、Kojima T.M.、Miyatake H.、Moon J.Y.、Niwase T.、Sonoda T.、Takamine A.、Watanabe Y.X.、Wollnik H.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

      Volume: 463 Pages: 184-188

    • DOI

      10.1016/j.nimb.2019.05.058

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-stability, high-voltage power supplies for use with multi-reflection time-of-flight mass spectrographs2020

    • Author(s)
      Schury P.、Wada M.、Wollnik H.、Moon J.-Y.、Hashimoto T.、Rosenbusch M.
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 1 Pages: 014702-014702

    • DOI

      10.1063/1.5104292

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study of Quasielastic Barrier Distributions as a Step towards the Synthesis of Superheavy Elements with Hot Fusion Reactions2020

    • Author(s)
      Tanaka T.、Morita K.、Morimoto K.、Kaji D.、Haba H.、Boll R.A.、Brewer N.T.、Van Cleve S.、Dean D.J.、Ishizawa S.、Ito Y.、Komori Y.、Nishio K.、Niwase T.、Rasco B.C.、Roberto J.B.、Rykaczewski K.P.、Sakai H.、Stracener D.W.、Hagino K.
    • Journal Title

      Physical Review Letters

      Volume: 124 Issue: 5 Pages: 1-5

    • DOI

      10.1103/physrevlett.124.052502

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Strong one-neutron emission from two-neutron unbound states in β decays of the r-process nuclei Ga86,872019

    • Author(s)
      Yokoyama R.、Grzywacz R.、Rasco B. C.、Brewer N.、Rykaczewski K. P.、Dillmann I.、Tain J. L.、Nishimura S.、Ahn D. S.、et al
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 3 Pages: 1-6

    • DOI

      10.1103/physrevc.100.031302

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observation of a μs isomer in In8549134: Proton-neutron coupling “southeast” of Sn82501322019

    • Author(s)
      Phong V. H.、Lorusso G.、Davinson T.、Estrade A.、Hall O.、Liu J.、Matsui K.、Montes F.、Nishimura S.、Boso A.、et al
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 1 Pages: 1-6

    • DOI

      10.1103/physrevc.100.011302

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Proton Shell Evolution below Sn132: First Measurement of Low-Lying β-Emitting Isomers in Ag123,1252019

    • Author(s)
      Chen Z.Q.、Li Z.H.、Hua H.、Watanabe H.、Yuan C.X.、Zhang S.Q.、Lorusso G.、Nishimura S.、Baba H.、et al
    • Journal Title

      Physical Review Letters

      Volume: 122 Issue: 21 Pages: 1-6

    • DOI

      10.1103/physrevlett.122.212502

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Commissioning of the BRIKEN detector for the measurement of very exotic β-delayed neutron emitters2019

    • Author(s)
      Tolosa-Delgado A.、Agramunt J.、Tain J.L.、Algora A.、Domingo-Pardo C.、Morales A.I.、Rubio B.、Tarifeo-Saldivia A.、Calvio F.、Cortes G.、Brewer N.T.、Rasco B.C.、Rykaczewski K.P.、Stracener D.W.、Allmond J.M.、Grzywacz R.、Yokoyama R.、Singh M.、King T.、Madurga M.、Nishimura S.、Phong V.H.、et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 925 Pages: 133-147

    • DOI

      10.1016/j.nima.2019.02.004

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Analysis of nuclear structure in the nuclear chart and improvement to the gross theory of β decay2019

    • Author(s)
      Endo Fumitaka、Koura Hiroyuki
    • Journal Title

      Physical Review C

      Volume: 99 Issue: 3 Pages: 1-1

    • DOI

      10.1103/physrevc.99.034303

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improving wide-band mass measurements in a multi-reflection time-of-flight mass spectrograph by usage of a concomitant measurement scheme2018

    • Author(s)
      P. Schury, Y. Ito, M. Rosenbusch, H. Miyatake, M. Wada and H. Wollnik
    • Journal Title

      Int. J. Mass Spectrom.

      Volume: 433 Pages: 40-46

    • DOI

      10.1016/j.ijms.2018.08.007

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph2018

    • Author(s)
      Ito Y.、Schury P.、Wada M.、Arai F.、Haba H.、Hirayama Y.、Ishizawa S.、Kaji D.、Kimura S.、Koura H.、MacCormick M.、Miyatake H.、Moon J.?Y.、Morimoto K.、Morita K.、Mukai M.、Murray I.、Niwase T.、Okada K.、Ozawa A.、Rosenbusch M.、Takamine A.、Tanaka T.、Watanabe Y.?X.、Wollnik H.、Yamaki S.
    • Journal Title

      Physical Review Letters

      Volume: 120 Issue: 15 Pages: 152501-152501

    • DOI

      10.1103/physrevlett.120.152501

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes2018

    • Author(s)
      Rosenbusch M., Ito Y., Schury P., Wada M., Kaji D., Morimoto K., Haba H., Kimura S., Koura H., MacCormick M., Miyatake H., Moon J.Y., Morita K., Murray I., Niwase T., Ozawa A., Reponen M., Takamine A., Tanaka T., Wollnik H.
    • Journal Title

      Physical Review C

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph2018

    • Author(s)
      Kimura S.、Ito Y.、Kaji D.、Schury P.、Wada M.、Haba H.、Hashimoto T.、Hirayama Y.、MacCormick M.、Miyatake H.、Moon J.Y.、Morimoto K.、Mukai M.、Murray I.、Ozawa A.、Rosenbusch M.、Schatz H.、Takamine A.、Tanaka T.、Watanabe Y.X.、Wollnik H.
    • Journal Title

      International Journal of Mass Spectrometry

      Volume: 印刷中 Pages: 134-142

    • DOI

      10.1016/j.ijms.2018.05.001

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observation of doubly-charged ions of francium isotopes extracted from a gas cell2017

    • Author(s)
      Schury P.、Wada M.、Ito Y.、Kaji D.、Haba H.、Hirayama Y.、Kimura S.、Koura H.、MacCormick M.、Miyatake H.、Moon J.Y.、Morimoto K.、Morita K.、Murray I.、Ozawa A.、Rosenbusch M.、Reponen M.、Takamine A.、Tanaka T.、Watanabe Y.X.、Wollnik H.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

      Volume: 407 Pages: 160-165

    • DOI

      10.1016/j.nimb.2017.06.014

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] MRTOF development & Status @ RIBF2020

    • Author(s)
      M. Wada
    • Organizer
      NUSTAR Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 原子質量・なぜ?いかにして測るか?2020

    • Author(s)
      和田道治
    • Organizer
      日本物理学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Present Status and Prespectives of Superheavy Element Chemistry at RIKEN2020

    • Author(s)
      H. Haba
    • Organizer
      The 10t h International Conference on Isotopes, 10ICI
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Towards precise mass measurements of Nh and Mc isotopes2019

    • Author(s)
      M. Wada
    • Organizer
      4th International Sympos ium on Superheavy Elements
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Present status and perspectives of superheavy element researches at RIKEN2019

    • Author(s)
      H. Haba
    • Organizer
      XXXVIth Mazurian Lakes Conference on Physics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] SHE-Mass II setup for direct mass measurement of hot fusion superheavy nuclides2019

    • Author(s)
      M. Wada
    • Organizer
      6 t h International Conference on the Chemistry and Physics of the Transactinide Elements
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] KISS Project2019

    • Author(s)
      H. Miyatake
    • Organizer
      15th Asia-Pacific Physics Conferece
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent experimental results of KEK Isotope Separation System (KISS)2019

    • Author(s)
      Y. Watanabe
    • Organizer
      MSI-2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of researches with KISS and MRTOF2019

    • Author(s)
      H. Miyatake
    • Organizer
      OMEG 15
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthesis and Chemistry of New Elements at RIKEN2019

    • Author(s)
      H. Haba
    • Organizer
      9th European Chemistry Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Towards comprehensive mass measurements with MRTOF mass spectrographs at RIKEN RIB F2019

    • Author(s)
      M. Wada
    • Organizer
      2019 The Korean Physical Society Spring Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Nuclear spectroscopy of r-process nuclei using KEK Isotope Separator System2018

    • Author(s)
      Y. Hirayama
    • Organizer
      EMIS2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mass Measurements with MRTOF at RIKEN RIBF2018

    • Author(s)
      M. Wada
    • Organizer
      NUSTAR Week in Milan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MRTOF Mass Spectrographs at RIKEN RIBF --- toward comprehensive mass measurements of >1000 nuclides including super heavy nuclides ---2018

    • Author(s)
      M. Wada
    • Organizer
      NN2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mass measurements of short-lived nuclei with a multi-reflection time-of-flight mass spectrograph - recent results and future plans -2017

    • Author(s)
      Wada M
    • Organizer
      The 10th International Conference on Nuclear Physics at Storage Rings(STORI'17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High Precision Spectroscopy of low-energy short-lived nuclei2017

    • Author(s)
      Wada M.
    • Organizer
      Turkish Physical Society 33rd International Physics Congress; TPS33
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Precision mass measurements of short-lived heavy nuclei, present and future toward comprehensive measurement2017

    • Author(s)
      Wada M.
    • Organizer
      International symposium on RI beam physics in the 21st century: 10th anniversary of RIBF
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MRTOF質量分光器を用いた重元素の網羅的高精度質量測定2017

    • Author(s)
      Wada M.
    • Organizer
      2017年度核データ研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Toward mass measurement of super-heavy nuclei using MRTOF2017

    • Author(s)
      Wada M.
    • Organizer
      Workshop for Einsteinium Campaign
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High precision mass measurements of intermediate-mass neutron-deficient nuclei via MRTOF-MS2017

    • Author(s)
      Kimura S.,
    • Organizer
      The 10th International Conference on Nuclear Physics at Storage Rings(STORI'17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Direct mass measurements of neutron-deficient Actinium and Radium isotopes; Probing indirect mass links in the region of heavy nuclei2017

    • Author(s)
      Rosenbusch M.
    • Organizer
      The 10th International Conference on Nuclear Physics at Storage Rings(STORI'17)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nuclear production by multinucleon transfer reactions with neutron-rich heavy ion beams2017

    • Author(s)
      Watanabe Y.
    • Organizer
      Workshop for Einsteinium Campaign
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent KISS activities and future’s plan2017

    • Author(s)
      Miyatake H.
    • Organizer
      Workshop for Einsteinium Campaign
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Present status of the KISS pro2017

    • Author(s)
      Miyatake H.
    • Organizer
      BUAA Workshop "Impact of Exotic Nuclear Structure on Explosive Nucleosynthesis"
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Nuclear spectroscopy of r-process nuclei around <i>N</i> = 126 by using KISS2017

    • Author(s)
      Hirayama Y.
    • Organizer
      International symposium on RI beam physics in the 21st century: 10th anniversary of RIBF
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] 物理科学,この1年 20222022

    • Author(s)
      パリティ編集委員会、大槻 義彦
    • Total Pages
      204
    • Publisher
      丸善出版
    • ISBN
      9784621306864
    • Related Report
      2021 Annual Research Report
  • [Remarks] KEK和光原子核科学センター

    • URL

      https://research.kek.jp/group/wnsc/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 超重元素の初めての精密質量測定に成功 「新元素の新しい原子番号決定法の証明」

    • URL

      https://www.kek.jp/ja/press/202109010000/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 2021年12月の活動報告 : 短寿命核グループ

    • URL

      https://www2.kek.jp/ipns/ja/report/2021/12-1/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 中性子過剰タンタル核異性体で探る原子核形状の多様性原子核構造の研究から重元素合成の起源天体解明に迫る

    • URL

      https://www.kek.jp/ja/press/ipns_pr20201111-2/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 2021年3月の活動報告 : 短寿命核グループ

    • URL

      https://www2.kek.jp/ipns/ja/report/2021/03-2/

    • Related Report
      2020 Annual Research Report
  • [Remarks] KEK 和光原子核科学センター

    • URL

      http://research.kek.jp/group/wnsc/

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report

URL: 

Published: 2017-05-02   Modified: 2023-10-16  

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