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Kinematics of Eley-Rideal Reactions at Hyperthermal Energies

Yao, Yunxi and Giapis, Konstantinos P. (2016) Kinematics of Eley-Rideal Reactions at Hyperthermal Energies. Physical Review Letters, 116 (25). Art. No. 253202. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20160622-131326121

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.116.253202DOIArticle
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.253202PublisherArticle
http://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.116.253202PublisherSupplemental Material
ORCID:
AuthorORCID
Yao, Yunxi0000-0002-0814-6675
Giapis, Konstantinos P.0000-0002-7393-298X
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).
Funders:
Funding AgencyGrant Number
NSFPHY-1202567
Issue or Number:25
Record Number:CaltechAUTHORS:20160622-131326121
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160622-131326121
Official Citation:Kinematics of Eley-Rideal Reactions at Hyperthermal Energies Yunxi Yao and Konstantinos P. Giapis Phys. Rev. Lett. 116, 253202
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68594
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Jun 2016 00:22
Last Modified:09 Mar 2020 13:19

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