Development of ultrafast photoelectrron diffraction

2015 Fiscal Year Final Research Report

• Project/Area Number: 25246041
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: YAGISHITA AKIRA 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, 名誉教授 (80157966)
• Co-Investigator(Kenkyū-buntansha): FUJIKAWA TAKASHI 千葉大学, 融合科学研究科, 名誉教授 (30114987) ; TERAMOTO TAKAHIRO 立命館大学, 理工学部, 助教 (40467056) ; KISHIMOTO NAOKI 東北大学, 理学系研究科, 准教授 (60302080)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 光電子回折法 / 配列分子 / Ｘ線自由電子レーザー / 分子構造

Outline of Final Research Achievements

We have measured deep inner-shell 2p X-ray photoelectron diffraction (XPD) profiles from laser-aligned I2 molecules using X-ray free-electron laser (XFEL) pulses. By applying our molecular structure determination methodology to the XPD profiles, which were measured for I2 molecular ensembles with high degree of alignment, we have succeeded in determining the inter-nuclear distance of the I2 molecules in the electric field of Nd:YAG laser for the alignment.
Thus, it was revealed that the inter-nuclear distance in the laser field is elongated by ca. 0.3Å, compared to that of the equilibrium geometry of the ground state.

Free Research Field

化学物理、　軟Ｘ線分光