Evolution of clusters in energetic heavy ion bombarded amorphous graphite-III: Photo-emission and velocity analysis of sputtered carbon clusters

Abstract

Diagnostics of the carbon atoms, ions, and clusters sputtered from a graphite surface under 10 keV Xe ion bombardments reveals the presence of neutral carbon clusters and positively charged species in the photo-emission spectra. The observed absence of the positively charged clusters in the mass spectra by a velocity analyzer is supplemented by the presence of the negatively charged monatomic, diatomic, triatomic and quatratomic clusters.. The velocity spectra are dominated by the negative C1, C2, C3 and C4. The latter two are observed having much reduced peak intensities . These results may help us to understand the contribution of neutral and charged species in the heavy-ion sputtering of graphite and the energetics of soot formation. Xe is chosen being the heaviest noble gas ion irradiating at not too high energy i.e 10 keV.

6 pages, 4 figures

References in corpus (3)

• Regenerative Soot: A cusp field, graphite hollow cathode, carbon cluster ion source
• Evolution of clusters in energetic heavy ion bombarded amorphous graphite
• Regenerative Soot-II: Emission of carbon clusters from sooting plasma

Cited by in corpus (4)

• Regenerative Soot-III: Role of the kinetic and potential sputtering in the regeneration of the soot
• Regenerative Soot-VIII: Sputtering and formation of C1 and C2
• Regenerative Soot-VI: The excited states of neutral and ionized carbon in regenerative sooting discharges
• Evolution of clusters in energetic heavy ion bombarded amorphous graphite-III: Energy spectra of charged clusters recoiling from Xe+ irradiations