Interatomic Coulombic decay in mixed NeKr clusters

Abstract

We report the occurrence of Interatomic Coulombic Decay (ICD) in mixed NeKr clusters. A well-defined feature ranging from 9 -12 eV in kinetic energy is observed in coincidence with the Ne 2s photoelectrons. It derives from an ICD process, in which an initial Ne 2s vacancy is filled by a Ne 2p electron and an electron is emitted from a 4p level on a neighboring Kr atom. We have studied the dependence of the effect on photon energy, cluster composition and cluster size. Interestingly, the ICD electron energy increases slightly and grows a shoulder on going from 2% to 5% Kr in the co-expansion process, which we interpret in terms of surface vs. bulk effects.

Competition between proton transfer and intermolecular Coulombic decay in water

“…The magnetic guiding field has a strong inhomogeneous component produced by a permanent magnet below the interaction region (magnetic field strength ≈0.4 T) and a weak homogeneous field in the drift region, induced by a solenoid wound around the drift tube. The spectrometer enables the detection of normal PE and electron–electron coincidence spectra with a high efficiency 44 , determined as γ ( E ICD ) = 0.58(4) for the data presented. The coincident detection scheme allows separation of the initially ionized photoelectrons from the secondary electrons.…”

Interatomic and intermolecular Coulombic decay: the coming of age story

“…A tentative estimate of the efficiency of ICD after inner-valence ionization of 20 to 40% was given. Following pioneering experiments [57], Förstel et al were able to show, that ICD after 2s-ionization of neon clusters has an efficiency of unity (0.99 ± 0.11) [58] by employing an electron/electron-coincidence approach using a magnetic bottle spectrometer [59]. A corresponding measurement revealed that this is not the case for inner-valence ionized states of water clusters [60].…”

Electronic Decay of Singly Charged Ground-State Ions by Charge Transfer via van der Waals Bonds

“…Furthermore, most heterogeneous noble gas clusters are known to occur in core-shell structures with the heavier element forming the core and the lighter element arranging at the surface [28][29][30]. Because Ne is much lighter than Kr, it is likely that an ionized Ne atom is at the surface of a large heterogeneous NeKr cluster and forms a Ne þ 2 with another Ne atom.…”