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Title: Effects of the surface Miller index on the resonant neutralization of hydrogen anions near Ag surfaces

Abstract

We compare the resonant neutralization dynamics of hydrogen anions in front of plane Ag surfaces of symmetries (100) and (111) using a Crank-Nicholson wave-packet propagation method. For the Ag(100) surface, the surface state, degenerate with the valence band, rapidly decays while being populated by the ion. For Ag(111), in contrast, the population of a quasi-local Shockley surface state inside the projected L-band gap impedes the electron decay into the bulk along the direction normal to the surface. This difference in the decay pattern strongly affects the survival of 1 keV ions scattered from these surfaces. Scattering off the Ag(111) surface results in about an order of magnitude higher ion-survival as a function of the exit angle with respect to the surface plane compared to that off Ag(100). Results for Ag(111) show good agreement with measurements [Guillemot and Esaulov, Phys. Rev. Lett. 82, 4552 (1999)].

Authors:
; ;  [1]
  1. James R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604 (United States)
Publication Date:
OSTI Identifier:
20643629
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 69; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.69.052901; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANIONS; CHARGE EXCHANGE; COMPARATIVE EVALUATIONS; DECAY; ELECTRONS; ENERGY GAP; HYDROGEN IONS; ION-ATOM COLLISIONS; KEV RANGE; SCATTERING; SILVER; SYMMETRY; VALENCE; WAVE PACKETS

Citation Formats

Chakraborty, Himadri, Niederhausen, Thomas, and Thumm, Uwe. Effects of the surface Miller index on the resonant neutralization of hydrogen anions near Ag surfaces. United States: N. p., 2004. Web. doi:10.1103/PhysRevA.69.052901.
Chakraborty, Himadri, Niederhausen, Thomas, & Thumm, Uwe. Effects of the surface Miller index on the resonant neutralization of hydrogen anions near Ag surfaces. United States. https://doi.org/10.1103/PhysRevA.69.052901
Chakraborty, Himadri, Niederhausen, Thomas, and Thumm, Uwe. Sat . "Effects of the surface Miller index on the resonant neutralization of hydrogen anions near Ag surfaces". United States. https://doi.org/10.1103/PhysRevA.69.052901.
@article{osti_20643629,
title = {Effects of the surface Miller index on the resonant neutralization of hydrogen anions near Ag surfaces},
author = {Chakraborty, Himadri and Niederhausen, Thomas and Thumm, Uwe},
abstractNote = {We compare the resonant neutralization dynamics of hydrogen anions in front of plane Ag surfaces of symmetries (100) and (111) using a Crank-Nicholson wave-packet propagation method. For the Ag(100) surface, the surface state, degenerate with the valence band, rapidly decays while being populated by the ion. For Ag(111), in contrast, the population of a quasi-local Shockley surface state inside the projected L-band gap impedes the electron decay into the bulk along the direction normal to the surface. This difference in the decay pattern strongly affects the survival of 1 keV ions scattered from these surfaces. Scattering off the Ag(111) surface results in about an order of magnitude higher ion-survival as a function of the exit angle with respect to the surface plane compared to that off Ag(100). Results for Ag(111) show good agreement with measurements [Guillemot and Esaulov, Phys. Rev. Lett. 82, 4552 (1999)].},
doi = {10.1103/PhysRevA.69.052901},
url = {https://www.osti.gov/biblio/20643629}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 69,
place = {United States},
year = {2004},
month = {5}
}