Very-high-resolution laser photoelectron spectroscopy of molecules

Abstract

A very-high-resolution molecular photoelectron spectroscopy based on 'resonantly enhanced multiphoton ionization' (REMPI) is described, in which zerokinetic-energy (ZEKE) photoelectrons are measured as a function of laser wavelength in two-color experiments with tunable pulsed UV/visible lasers. The REMPI-based photoelectron technique provides both 'cation spectroscopy' and 'excited-state spectroscopy' for gaseous molecular species. The following topics are mainly described. The principles, characteristics, and advantages of the REMPI-based photoelectron spectroscopy are described in Sect. 8.2; several types of compact cm-1-resolution and high-brightness ZEKE photoelectron analyzers in Sect. 8.3; and its typical plications to jet-cooled van der Waals molecules in Sect. 8.4. © 2007 Springer.