We report time resolved study of C2emission from laser produced carbon plasma in presence of ambient helium gas. The 1.06 µm radiation from a Nd:YAG laser was focused onto a graphite target where it produced a transient plasma. We observed double peak structure in the time profile of C2species. The twin peaks were observed only after a threshold laser fluence. It is proposed that the faster velocity component in the temporal profiles originates mainly due to recombination processes. The laser fluence and ambient gas dependence of the double peak intensity distribution is also reported.
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Harilal et al. (1997) studied this question.
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