Journal Article Structure determination of molecules in an alignment laser field by femtosecond photoelectron diffraction using an X-ray free-electron laser

Minemoto, Shinichirou  ,  Teramoto, Takahiro  ,  Akagi, Hiroshi  ,  Fujikawa, Takashi  ,  Majima, Takuya  ,  Nakajima, Kyo  ,  Niki, Kaori  ,  Owada, Shigeki  ,  Sakai, Hirofumi  ,  Togashi, Tadashi  ,  Tono, Kensuke  ,  Tsuru, Shota  ,  Wada, Ken  ,  Yabashi, Makina  ,  Yoshida, Shintaro  ,  Yagishita, Akira

62016-12-09 , Springer Nature
We have successfully determined the internuclear distance of I2 molecules in an alignment laser field by applying our molecular structure determination methodology to an I 2p X-ray photoelectron diffraction profile observed with femtosecond X-ray free electron laser pulses. Using this methodology, we have found that the internuclear distance of the sample I2 molecules in an alignment Nd:YAG laser field of 6 × 1011 W/cm2 is elongated by from 0.18 to 0.30 Å "in average" relatively to the equilibrium internuclear distance of 2.666 Å. Thus, the present experiment constitutes a critical step towards the goal of femtosecond imaging of chemical reactions and opens a new direction for the study of ultrafast chemical reaction in the gas phase.

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