IONIZATION PROBABILITIES OF PARTICLES SPUTTERED FROM HIGH-T(C) SUPERCONDUCTORS

Authors
POPOV AB KABLUKOV SB MAKARENKO BN SHERGIN AP
Citation
Ab. Popov et al., IONIZATION PROBABILITIES OF PARTICLES SPUTTERED FROM HIGH-T(C) SUPERCONDUCTORS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 78(1-4), 1993, pp. 290-293
Citations number
14
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
78
Issue
1-4
Year of publication
1993
Pages
290 - 293
Database
ISI
SICI code
0168-583X(1993)78:1-4<290:IPOPSF>2.0.ZU;2-3
Abstract
The yields and the energy spectra of secondary neutrals, positive and negative ions sputtered from YBaCuO and BiSrCaCuO superconductors were measured. A strong correlation between the experimental surface bindi ng energies U(b) and the atom site in the unit cell was observed. The velocity dependences of ionization probabilities P+ ad P- of sputtered particles provide evidence for the electron exchange mechanism in sec ondary ion formation. An exponential dependence of absolute values of P+ on the ionization potential is observed for atoms of main component s of HTSCs.