It is well recognized that Auger decay is an important mechanism to produce active states for ion desorption in ionic as well as covalent compounds (2). However, it is also clear that the ion desorption yield induced by core excitation is not proportional to the total core hole production ...
Auger-induced desorption of fluorine has been postulated [6] as a reason for the metallization of LiF surfaces following 10 — 400 eV He + impact and Auger electron yields of ~ 0.5 electrons/ion from 10 — 200 eV He + bombardment of LiF have been measured [7]. The formation of halogen...
This phenomenon was interpreted by an Auger stimulated desorption (ASD) model [12] or an ultra-fast dissociation model (proposed for water [3], [4], [5], ammonia [4], [5], and benzene [5], [11]). In adsorbates and condensates, Auger-induced two-hole states are de-excited by ...
deep-core excitationphoton-stimulated ion desorptionAuger decayresonance excitationPhoton-stimulated ion desorption from solid SiCl following the deep-core excitations at the K-edges has been investigated together with the Auger decay spectra using synchrotron radiation. The major Auger-decay channel ...
The core-level-excitation-induced ion desorption from surface is investigated. Two studies using electron-ion coincidence spectroscopy are shown. On Si(100)/H_2O surface, it is shown that ion desorption is mainly induced by the shake-up/ off excitation accompanying the Auger decay when the ...
The ion desorption following the metal-core excitation cannot be fully explained by a similar mechanism to the KF model where the interatomic Auger decay prov'ides the change of the charging state of the oxygen. We therefore propose a new mechanism in which the charge trar sfer from the O2p ...
The ionization of oxygen occurs due to the Auger decay of the O 2s hole on the way out from the surface after breakage of the chemisorptive bond; this is essential for the emission of very low-energy (<10 eV) O[sup +] ions without resonant neutralization. This mechanism is consistent ...
The stimulated desorption of secondary O[sup +] and F[sup +] ions does not exhibit the band effect. This is because the desorption is initiated by the core hole state, which is followed by ionization via the intra-atomic Auger decay after breakage of the chemisorptive bond. The stimulated...
On the basis of these experiments as well as ab initio molecular-orbital calculations, it is concluded that desorption of fluorine is initiated by creation of the F 2s hole as a result of the nonadiabatic charge exchange with the primary ion. The ionization of the core-excited fluorine occurs...
Auger electron-photoion coincidence (AEPICO) spectroscopy, which has been recently developed and proved to be a very powerful technique for investigating the dynamics of desorption induced by the core-level excitation, is applied to the investigation of Auger-stimulated ion desorption from the ...