2022 Fiscal Year Final Research Report
Development of a site-specific chemical analysis method by using intense XFEL
| Project/Area Number |
20K05549
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 34020:Analytical chemistry-related
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 非線形光学応答 / 電子イオンコインシデンス / 極紫外・X線自由電子レーザー / 内殻二重空孔 / 局所化学分析 |
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| Outline of Final Research Achievements |
We have developed an electron-ion coincidence system using a magnetic bottle-type photoelectron spectrometer with an ion-collection scheme with the aim of developing and establishing a new type of site-specific chemical analysis method using properties of double-core-hole states. In order to increase true coincidence events, we improved detection efficiencies of electrons as well as ions. By applying the developed device to various atoms and molecules, we succeeded in obtaining information on double-core-hole states formed by two-photon absorption of EUV-FEL light based on electron-ion coincidence maps.
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| Free Research Field |
物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，非線形イオン化で生じた多数の電子に加えてイオンも同時に検出するという，これまでにない新規なアプローチを実現することで，内殻二重正孔状態の関与する原子分子の非線形光学応答の基本的現象を明らかにした．本手法では分子を構成する各原子に深く束縛されている内殻電子状態をプローブするため，分子全体に大きく広がった分子軌道を形成する価電子帯の電子を観測することでは得られない元素選択的かつ局所的な情報が得られると期待される．
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