Abstract
We have studied the optical emission spectra of a laser plasma formed when targets made from zinc alloys and positioned in a liquid are exposed to dual laser pulses, for different delays between pulses. We give estimates of the electron temperature and electron concentration for the plasma in the liquid from the Boltzmann and Saha–Boltzmann equations and the Stark line broadening. We have established that as the interpulse interval increases, fractionation of the alloying elements entering the plasma is enhanced.
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