Benzene-Rare Gas Matrices: Evidence from Electron Photoemission Spectra for Wannier Impurity States

Abstract

Recent experiments on rare gas solids doped with benzene⁽¹⁾ and naphthalene⁽²⁾ have supported the suggestion⁽³⁾ that large radius impurity states of molecules in rare gas matrices should be observable. The energy of the impurity Wannier state (E _n) is related to the band gap I _s, the photoemission threshold F and the ionization potential of the free molecule I _G by the following expressions where G equals m∗e∗/²X^2h2, P ₊ is the polarization energy of the medium by the positive impurity hole, V ₀ is the energy of the quasifree excess electron in the medium.