Study of kinetics of atomic carbon during laser ablation of graphite in nitrogen by time- and space-resolved emission spectroscopy

• Published in: Applied surface science Vol. 186; no. 1; pp. 329 - 334
• Main Authors: Acquaviva, S, De Giorgi, M.L
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 28-01-2002; Elsevier Science
• Subjects: Exact sciences and technology; Laser-plasma interactions; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Reactive laser ablation; Time- and space-resolved emission spectroscopy; Reactive laser ablation; Time- and space-resolved emission spectroscopy
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/S0169-4332(01)00667-5

We performed plasma optical emission studies during XeCl laser ablation of graphite in nitrogen at a laser fluence of 12
J/cm
2, this corresponding to the experimental conditions for which the growth of microcrystalline CN
x
film by pulsed laser deposition has been observed. In this work, we focus our attention on the temporal and spatial evolution of the C I emission line at 247.86
nm in vacuum and for different nitrogen pressures, in the range from 1 to 50
Pa. The plasma expansion in nitrogen background has been analysed in terms of drag model. Results show that in our experimental conditions gas-phase reactions are dominant. Kinetic energies for atomic carbon of the order of tens of electronvolts have been inferred from the emission spectra.