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Title: Electron emission and energy loss in grazing collisions of protons with insulator surfaces

Electron emission from LiF, KCl, and KI crystal surfaces during grazing collisions of swift protons is studied using a first-order distorted-wave formalism. Owing to the localized character of the electronic structure of these surfaces, we propose a model that allows us to describe the process as a sequence of atomic transitions from different target ions. Experimental results are presented for electron emission from LiF and KI and energy loss from KI surfaces. Calculations show reasonable agreement with these experimental data. The role played by the charge of the incident particle is also investigated.
Authors:
;  [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ; ;  [7]
  1. Instituto de Astronomia y Fisica del Espacio, Consejo Nacional de Investigaciones Cientificas y Tecnicas, and Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires (Argentina)
  2. Departamento de Fisica de Materiales, Facultad de Quimica, UPV/EHU, San Sebastian (Spain)
  3. (Spain)
  4. Centro Atomico Bariloche, San Carlos de Bariloche (Argentina)
  5. (DIPC), San Sebastian (Spain)
  6. Institut fuer Allgemeine Physik der TU Wien, Wiedner Haupstrasse 8-10, A-1040 Vienna (Austria)
  7. Institut fuer Physik, Humboldt Universitaet zu Berlin, Brook-Taylor-Strasse 6, D-12489 Berlin-Adlershof (Germany)
Publication Date:
OSTI Identifier:
21011245
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 76; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.76.012904; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; COLLISIONS; COMPUTER CALCULATIONS; CRYSTALS; DISTORTED WAVE THEORY; ELECTRON EMISSION; ELECTRONIC STRUCTURE; ELECTRONS; ENERGY LOSSES; ENERGY-LOSS SPECTROSCOPY; LITHIUM FLUORIDES; PARTICLES; POTASSIUM CHLORIDES; POTASSIUM IODIDES; PROTONS; SURFACES