Initial applications of threshold photoelectron-photoion coincidence velocity imaging technique

Threshold photoelectron-photoion coincidence (TPEPICO) velocity imaging based on synchrotron radiation ionization utilizes a double velocity map imaging to simulateneously control the trajectories of electron and ion, thus improving their collection efficiencies and energy resolutions. Using this technique, some experimental investigations of atoms and molecules were performed, and the corresponding threshold photoelectron spectroscopy (TPES), TPEPICO time-of-flight mass spectroscopy, TPEPICO spectroscopy, and TPEPICO velocity imaging were measured. Therefore, this novel technique can be applied to studies of ionic structure, identification of components in mixture and dissociation dynamics of state-selected ions.