Abstract

A Nd-YAG laser system operated in the Q-switched mode was used to generate vapour plume on UO 2 and graphite targets. The vapour species formed were analysed by a quadrupole mass filter. The time resolved spectrum was obtained for each of the observed vapour species, namely, O, U, UO, UO 2 and UO 3 over UO 2 and C 1 to C 5 over graphite. Time of arrival (TOA) spectra were obtained as a function of laser power density. These TOA data are fitted by the shifted Maxwell Boltzmann distributions so as to obtain the translational temperatures and velocities of the vapour species present in the plume.

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