Development of novel method for the first ionization potential measurement toward for element 113

• Project/Area Number: 26390119
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Sato Tetsuya K. 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 先端基礎研究センター, 研究副主幹 (40370382)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: アクチノイド / 第一イオン化エネルギー / ローレンシウム / オンライン同位体分離器 / 超重元素 / ニホニウム / イオン化エネルギー / 相対論効果 / 表面電離 / ランタノイド

Outline of Final Research Achievements

The first ionization potential (IP1) is one of the basic properties of atomic properties of elements and reflect to a binding energy of the valence orbital. So far, IP1 values after fermium, element 100, have not determined experimentally due to difficulties of experiments in superheavy element region.
In this work we have developed a novel method to determine the first ionization potential (IP1) by an application of a surface ionization which takes place a solid surface at high temperature. We successfully determined IP1 value of lawrencium (Lr, element 103) for the first time using the method and obtained an information on the electronic configuration of Lr atom.

Research Products

• [Int'l Joint Research] マインツ大学(ドイツ)
• [Int'l Joint Research] CERN(スイス)
• [Int'l Joint Research] フローニンゲン大(オランダ)
• [Int'l Joint Research] マインツ大学/重イオン研究所(GSI)(ドイツ)
• [Int'l Joint Research] ポール・シェラー研究所(PSI)/欧州原子核研究機構(CERN)(スイス)
• [Journal Article] First ionization potential of the heaviest actinide lawrencium, element 103 (2016)
  • Author(s): T.K. Sato, M. Asai, A. Borschevsky, T. Stora, N. Sato, Y. Kaneya, K. Tsukada, Ch.E. Duellmann, K. Eberhardt, E. Eliav, S. Ichikawa, U. Kaldor, J.V. Kratz, S. Miyashita, Y. Nagame, K. Ooe, A. Osa, D. Renisch, J. Runke, M. Schaedel, P. Thoerle-Pospiech, A. Toyoshima, N. Trautmann
  • Journal Title: EPJ Web of Conferences Volume: 131 Pages: 05001-05001
  • DOI: 10.1051/epjconf/201613105001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 表面電離法によるローレンシウムのイオン化エネルギー測定 (2016)
  • Author(s): 佐藤哲也
  • Journal Title: 原子核研究 Volume: 61 Pages: 96-106
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 103番元素が周期表を変える?! ローレンシウムの第一イオン化エネルギーの測定から (2016)
  • Author(s): 佐藤哲也
  • Journal Title: 化学 Volume: 71 Pages: 12-16
  • NAID: 40020742490
• [Journal Article] 103番元素で見つけた周期表の綻び ローレンシウムのイオン化エネルギー測定に成功 (2015)
  • Author(s): 佐藤哲也、永目諭一郎、塚田和明
  • Journal Title: 化学と工業 Volume: 68 Pages: 824-826
• [Journal Article] 103番元素が解く、周期表のパズル (2015)
  • Author(s): 佐藤哲也
  • Journal Title: 日本原子力学会誌 ATOMOΣ Volume: 57 Pages: 741-744
• [Journal Article] ローレンシウムがアクチノイド最後の元素であることを証明 (2015)
  • Author(s): 佐藤哲也
  • Journal Title: ISOTOPE NEWS Volume: 740 Pages: 16-19
  • Open Access
• [Journal Article] 表面電離法によるローレンシウムのイオン化エネルギー測定 (2015)
  • Author(s): 佐藤哲也
  • Journal Title: 放射化学 Volume: 32 Pages: 34-41
  • Open Access
• [Journal Article] Measurement of the First Ionization Potential of Lawrencium, Element 103 (2015)
  • Author(s): T.K. Sato, M. Asai, A. Borschevsky, T. Stora, N. Sato, Y. Kaneya, K. Tsukada, Ch.E. Duellmann, K. Eberhardt, E. Eliav, S. Ichikawa, U. Kaldor, J.V. Kratz, S. Miyashita, Y. Nagame, K. Ooe, A. Osa, D. Renisch, J. Runke, M. Schaedel, P. Thoerle-Pospiech, A. Toyoshima, N. Trautmann
  • Journal Title: Nature Volume: Vol. 520 Issue: 7546 Pages: 209-211
  • DOI: 10.1038/nature14342
  • Peer Reviewed
• [Journal Article] Development of a He/CdI2 gas-jet system coupled to a surface-ionization type ion-source in JAEA-ISOL: towards determination of the first ionization potential of Lr (Z=103) (2014)
  • Author(s): T. K. Sato, M. Asai, N.Sato, K.Tsukada, A. Toyoshima et al.
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 303 Issue: 2 Pages: 1253-1257
  • DOI: 10.1007/s10967-014-3467-5
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 103 番元素でみつけた周期表のほころび ～ 元素周期表が書き換わる? ～ (2016)
  • Author(s): 佐藤哲也
  • Organizer: 2016日本放射化学会年会・第60回放射化学討論会
  • Place of Presentation: 新潟大学（新潟県新潟市）
  • Year and Date: 2016-09-10
  • Invited
• [Presentation] First Ionization Potentials of Heavy Actinides (2016)
  • Author(s): T. K. Sato, M. Asai, N. Sato, Y. Nagame, 他
  • Organizer: NRC9; NINTH INTERNATIONAL CONFERENCE ON NUCLEAR AND RADIOCHEMISTRY
  • Place of Presentation: Helsinki, Finland
  • Year and Date: 2016-08-29
  • Int'l Joint Research / Invited
• [Presentation] Measurements of the first ionization potentials of the heaviest actinides (2016)
  • Author(s): T. K. Sato
  • Organizer: TASCA16
  • Place of Presentation: Darmstadt, Germany
  • Year and Date: 2016-08-26
  • Int'l Joint Research / Invited
• [Presentation] 103 番元素でみつけた周期表の綻び - 103 番元素ローレンシウムの第一イオン化エネルギー測定に成功- (2016)
  • Author(s): 佐藤哲也
  • Organizer: 第60回放射線科学研究会
  • Place of Presentation: 第60回放射線科学研究会
  • Year and Date: 2016-07-15
  • Invited
• [Presentation] Ionization Potentials of the Heaviest Actinides (2016)
  • Author(s): T. K. Sato
  • Organizer: Nobel Symposium NS160
  • Place of Presentation: Kristanstad, Sweden
  • Year and Date: 2016-05-29
  • Int'l Joint Research / Invited
• [Presentation] First Ionization Energy Measurements of Heaviest Actinides, Lawrencium and Nobelium (2015)
  • Author(s): T. K. Sato
  • Organizer: The International Chemical Congress of Pacific Basin Societies 2015(PACIFICHEM2015)
  • Place of Presentation: アメリカ ホノルル
  • Year and Date: 2015-12-15
  • Int'l Joint Research / Invited
• [Presentation] First Ionization Potential Measurements of Heaviest Actinides (2015)
  • Author(s): T. K. Sato
  • Organizer: The 14th Workshop on Recoil Separator for Super Heavy Element Chemistry (TASCA15)
  • Place of Presentation: ドイツ ダルムシュタット
  • Year and Date: 2015-10-23
  • Int'l Joint Research / Invited
• [Presentation] First Ionization Potential Measurements of Heaviest Actinides, Lawrencium and Nobelium (2015)
  • Author(s): T. K. Sato
  • Organizer: The NUSTAR Week 2015
  • Place of Presentation: ポーランド ワルシャワ
  • Year and Date: 2015-09-27
  • Int'l Joint Research / Invited
• [Presentation] First Ionization Potentials of Heaviest Actinides, Lawrencium and Nobelium (2015)
  • Author(s): T. K. Sato
  • Organizer: The 5th International Conference on the Chemistry and Physics of the Transactinide Elements (TAN15)
  • Place of Presentation: 裏磐梯ロイヤルホテル(福島県・耶麻郡)
  • Year and Date: 2015-05-25
  • Int'l Joint Research / Invited
• [Presentation] Measurement of the Ionization potential of Lr (Z=103) by online mass separation (2015)
  • Author(s): T. K. Sato
  • Organizer: The International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS-2015)
  • Place of Presentation: アメリカ グランドラピッズ
  • Year and Date: 2015-05-11
  • Int'l Joint Research
• [Presentation] 重アクチノイド元素ノーベリウム (No, Z=102) の 第一イオン化エネルギー測定 (2015)
  • Author(s): 佐藤哲也、浅井雅人、塚田和明、金谷祐亮、豊嶋厚史他
  • Organizer: 2015 日本化学会第95回春季年会
  • Place of Presentation: 日本大学船橋キャンバス
  • Year and Date: 2015-03-26 – 2015-03-29
• [Presentation] The First Ionization Potential Measurement of Lawrencium (Lr, Z = 103) (2014)
  • Author(s): T.K.Sato, M. Asai, N.Sato, Y.Kaneya, K. Tsukada et al.
  • Organizer: TASCA International workshop
  • Place of Presentation: ドイツ・ダルムシュタット
  • Year and Date: 2014-10-21
  • Invited
• [Presentation] The first successful determination of the first ionization potential of lawrencium (Lr, Z = 103) (2014)
  • Author(s): T.K.Sato, M. Asai, N.Sato, Y.Kaneya, K. Tsukada et al.
  • Organizer: ARIS2014
  • Place of Presentation: 東京大学
  • Year and Date: 2014-06-01 – 2014-06-06
• [Remarks] 103番元素が解く、周期表のパズル －ローレンシウム（Lr）のイオン化エネルギー測定に成功－
  • URL: https://www.jaea.go.jp/02/press2015/p15040901/
• [Remarks] 103番元素が解く、周期表のパズル －ローレンシウム（Lr）のイオン化エネルギー測定に成功－
  • URL: http://www.jaea.go.jp/02/press2015/p15040901/