Photoelectron spectroscopy of mass-selected metal cluster anions. I. Cu−n, n=1–10

摘要: Negative ion photoelectron spectra of Cu−n (n=1–10) are reported for the 0–2.4 eV region at an instrumental resolution 10 meV. The cluster anions were prepared in a flowing afterglow source incorporating cold cathode dc discharge. This very simple provides convenient, general method to prepare continuous beams near‐thermal metal ions intensities (up 10−11 A) sufficient spectroscopic or chemical studies. Photoelectron copper yield measurements vertical electron binding energies and adiabatic affinities as function size. overall trend observed is well described by classical spherical drop electrostatic model. In addition, quantum effects apparent higher generally clusters containing odd numbers atoms. Excited electronic states show that transition energy neutral molecule decreases rapidly with Vibrational s...