Core-excited Ar~*(2p_(3/2)~(-1) nl) atoms inside an Ar crystal: Effect of Ar neighbors on the excited state

摘要

The modifications induced on the core-excited Ar~*(2p_(3/2)~(-1) 4s) state by Ar neighbors inside solid Ar are studied via a microscopic model of the system associated to a wave-packet propagation treatment of the excited electron. Different environments, built up from finite size pieces of an fcc Ar crystal are considered. The Ar neighbors are shown to influence the excited 4s electron energy both via confinement of the excited orbital and via polarization of the surrounding medium. The difference between the 4s orbital and higher lying excited orbitals is stressed by considering the wave function of various excited orbitals inside a bulk environment. The present results are compared with available experimental results on the Ar~*(2p_(3/2)~(-1) 4s) state inside and at the surface of solid Ar.