A Study of Collision-Induced Desorption of N_2 on the Ni(100) Surface Using Fourier Transform Infrared Spectroscopy

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A collision-induced-desorption (CID) phenomenon was investigated using a new combination system of molecular beam and Fourier transform infrared spectroscopy (FHR). We observed the desorption of N_2 from the Ni( 100) surface induced by collision with hyperthermal Xe atoms. The Xe atoms were accelerated up to 1.23 eV in a supersonic molecular beam by seeding in He gas. The VTIR spectra of N_2 on the Ni(l00) surface were taken during the CID process. The cross section of CD depended on the incident energy of Xe. For 1.23 eV, it was 1.2 ±0.09 Å^2. The relationship between binding energy of N_2 on Ni(l00) surface and the threshold of incident energy of Xe for CID was discussed.
2002-10-15