Development of time-resolved electron momentum spectroscopy: Preliminary results for the photodissociation dynamics of several molecules

摘要

Through many years of intensive studies, electron momentum spectroscopy (EMS), also known as binary (e,2e) spectroscopy, has been established as a means to look at molecular orbital patterns in momentum space [1,2]. Since change of electron motion is the driving force behind any chemical reactions, application of EMS to transient molecular species is expected to provide new insights into ultrafast dynamics. This is the material motivation behind our recent achievement that we have developed an time-resolved EMS (TREMS) apparatus using an ultrashort pulsed electron gun, to combine EMS with the pump-and-probe technique [3].