Size effects in van der Waals clusters studied by spin and angle-resolved electron spectroscopy and multi-coincidence ion imaging

摘要: We have studied the valence and inner-shell photoionization of free rare-gas clusters by means angle spin resolved photoelectron spectroscopy momentum resolving electron-multi-ion coincidence spectroscopy. The electron measurements probe evolution angular distribution polarization parameters as a function photon energy cluster size, reveal strong size dependence distributions in certain regions. In contrast, parameter photoelectrons is found to be very close atomic value for all covered energies sizes. ion imaging measurements, which fragmentation dynamics multiply charged van der Waals clusters, also exhibit pronounced dependence.