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JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 39, Issue 7, Pages 1384-1391Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/39/7/008
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We report spectroscopic studies of the zinc plasma produced in air by the three harmonics of a Q-switched Pulsed Nd: YAG laser at 1064, 532 and 355 nm. The electron temperature has been determined from the intensity ratio of the transitions (4s4d D-3(3) -> 4s4p P-3(2)) at 334.5 nm and (4s5s S-3(1) -> 4s4p P-3(2)) at 481.0 nm of neutral zinc, whereas the electron number density has been evaluated from the Stark broadening of the (4s4d D-3(3) -> 4s4p P-3(2)) transition at 334.5 nm. It is observed that both these parameters decrease as the distance from the target surface increases and it increases with an increase in the laser irradiance. The power law is fitted to the experimental data.
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