Direct experimental observation of a new mechanism for sputtering of solids by a large polyatomic projectile: velocity-correlated cluster emission.
Phys Rev Lett
; 113(2): 027604, 2014 Jul 11.
Article
en En
| MEDLINE
| ID: mdl-25062236
ABSTRACT
We have measured kinetic energy distributions of Ta(n)C(n)(+) (n=1-10) and Ag(n)(+) (n=1-9) cluster ions sputtered off Ta and Ag targets, following impact of C(60)(-) at 14 keV kinetic energy. A gradual increase of the most probable kinetic energies with increased size of the emitted cluster was observed (nearly the same velocity for all n values). This behavior is in sharp contrast to that reported for cluster emission induced by the impact of a monoatomic projectile. Our observation is in good agreement with a mechanism based on the new concept of a superhot moving precursor as the source of the emitted clusters.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2014
Tipo del documento:
Article
País de afiliación:
Israel