Electron impact overtone excitation via the 2Σu resonance in N2 films physisorbed on Ag(110) at 15 K

F. Bartolucci; R. Franchy; Jorge Carvalho da Silva; A. M. C. Moutinho; D. Teillet-Billy; J. P. Gauyacq

doi:10.1063/1.475606

Electron impact overtone excitation via the ²Σ_u resonance in N₂ films physisorbed on Ag(110) at 15 K

F. Bartolucci, R. Franchy, Jorge Carvalho da Silva, A. M. C. Moutinho, D. Teillet-Billy, J. P. Gauyacq

DF – Departamento de Física

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Abstract

The growth and structure of solid nitrogen films on Ag(110) at 15 K was investigated by means of high resolution electron energy loss spectroscopy (EELS), thermal desorption spectroscopy (TDS). and low energy electron diffraction (LEED). The N₂ film exhibits a parallelogram structure in the monolayer. For the bilayer and multilayers an incoherent hexagonal structure has been found. The dynamics of the resonant vibrational excitation of the N₂ molecule via the 2Σ_u resonance is studied in detail both by the EELS method (as a function of the surface coverage) and theoretically. This allows a discussion of the effect of the adsorption on the vibrational excitation process and, in particular, on the overtone excitation. The 2Σ_u resonance excitation process is found to be almost not influenced by the adsorption in strong contrast with the case of the low energy (²II_g) N₂ resonance. The differences between these two processes are discussed.

Original language	English
Pages (from-to)	2251-2260
Number of pages	10
Journal	Journal of Chemical Physics
Volume	108
Issue number	5
DOIs	https://doi.org/10.1063/1.475606
Publication status	Published - 1 Feb 1998

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title = "Electron impact overtone excitation via the 2Σu resonance in N2 films physisorbed on Ag(110) at 15 K",

abstract = "The growth and structure of solid nitrogen films on Ag(110) at 15 K was investigated by means of high resolution electron energy loss spectroscopy (EELS), thermal desorption spectroscopy (TDS). and low energy electron diffraction (LEED). The N2 film exhibits a parallelogram structure in the monolayer. For the bilayer and multilayers an incoherent hexagonal structure has been found. The dynamics of the resonant vibrational excitation of the N2 molecule via the 2Σu resonance is studied in detail both by the EELS method (as a function of the surface coverage) and theoretically. This allows a discussion of the effect of the adsorption on the vibrational excitation process and, in particular, on the overtone excitation. The 2Σu resonance excitation process is found to be almost not influenced by the adsorption in strong contrast with the case of the low energy (2IIg) N2 resonance. The differences between these two processes are discussed.",

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T1 - Electron impact overtone excitation via the 2Σu resonance in N2 films physisorbed on Ag(110) at 15 K

AU - Bartolucci, F.

AU - Franchy, R.

AU - Silva, Jorge Carvalho da

AU - Moutinho, A. M. C.

AU - Teillet-Billy, D.

AU - Gauyacq, J. P.

PY - 1998/2/1

Y1 - 1998/2/1

N2 - The growth and structure of solid nitrogen films on Ag(110) at 15 K was investigated by means of high resolution electron energy loss spectroscopy (EELS), thermal desorption spectroscopy (TDS). and low energy electron diffraction (LEED). The N2 film exhibits a parallelogram structure in the monolayer. For the bilayer and multilayers an incoherent hexagonal structure has been found. The dynamics of the resonant vibrational excitation of the N2 molecule via the 2Σu resonance is studied in detail both by the EELS method (as a function of the surface coverage) and theoretically. This allows a discussion of the effect of the adsorption on the vibrational excitation process and, in particular, on the overtone excitation. The 2Σu resonance excitation process is found to be almost not influenced by the adsorption in strong contrast with the case of the low energy (2IIg) N2 resonance. The differences between these two processes are discussed.

AB - The growth and structure of solid nitrogen films on Ag(110) at 15 K was investigated by means of high resolution electron energy loss spectroscopy (EELS), thermal desorption spectroscopy (TDS). and low energy electron diffraction (LEED). The N2 film exhibits a parallelogram structure in the monolayer. For the bilayer and multilayers an incoherent hexagonal structure has been found. The dynamics of the resonant vibrational excitation of the N2 molecule via the 2Σu resonance is studied in detail both by the EELS method (as a function of the surface coverage) and theoretically. This allows a discussion of the effect of the adsorption on the vibrational excitation process and, in particular, on the overtone excitation. The 2Σu resonance excitation process is found to be almost not influenced by the adsorption in strong contrast with the case of the low energy (2IIg) N2 resonance. The differences between these two processes are discussed.

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Electron impact overtone excitation via the ²Σ_u resonance in N₂ films physisorbed on Ag(110) at 15 K

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