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Published June 24, 2016 | Published + Supplemental Material
Journal Article Open

Kinematics of Eley-Rideal Reactions at Hyperthermal Energies


Direct or Eley-Rideal reactions between energetic N^+ and O^+ projectiles and O atoms, adsorbed onto Pt and Pd surfaces, are studied experimentally at incidence energies between 20 and 200 eV. The exit energies of the diatomic molecular products NO and O_2 depend linearly on the incidence energy of the corresponding projectiles. A reaction mechanism is proposed, where the incident projectile collides with a single metal atom on the surface, linked to an adsorbed O atom. At the apsis point, a high-energy transient state is formed between the projectile, substrate, and adsorbate atoms. As the projectile begins to rebound, the transient state decomposes into a diatomic molecule, consisting of the original projectile and the adsorbed O atom, which exits the surface with memory of the incidence energy. Energy and momentum conservation during this single-bounce event (atom in, molecule out) accurately predict the exit energy of the molecular product, thus capturing the kinematics of the direct reaction.

Additional Information

© 2016 American Physical Society. Received 18 February 2016; published 21 June 2016. This material was based on work supported by the NSF (Grant No. 1202567).

Attached Files

Published - PhysRevLett.116.253202.pdf

Supplemental Material - Suppl_Mat_PRL.pdf


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August 20, 2023
October 19, 2023