Abstract
Laser-ablated brass plasma plumes expanding in various air pressures have been studied using optical emission spectroscopy and two-dimensional imaging. The velocity of the plume front calculated from the plot decreases from to as the pressure increases from 0.01 to . The estimated higher electron temperature for Cu I (510.5 nm) transition than for Zn I (481.1 nm) may be due to differences in the heat of vaporization and vaporization temperature of copper and zinc. The electron density estimated using the Stark-broadened transition of Cu I (510.5 nm) is about 10 times higher than that for transition of Zn I (481.1 nm). The appearance and enhancement of the (A–X) band at lower ambient pressure and formation of nanoparticle clusters have been extensively discussed. Stoichiometric and morphological study of the deposited nanoparticles on carbon tape at different ambient pressure reveals a different percentage composition of copper and of nanoparticles.
©2012 Optical Society of America
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