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FIZIKA A 14 (2005) 1 , 107-118
 
LASER-PRODUCED PLASMAS ON Mg, Al AND Si SURFACES
SANDA PLESLIĆ a and ŽELJKO ANDREIĆ b
aDepartment of Applied Physics, Faculty of Electrical
Engineering and Computing, University of Zagreb, Unska 3, 10000 Zagreb, Croatia
bFaculty of Mining, Geology and Petroleum Engineering, University in Zagreb,
Pierottijeva 6, 10000 Zagreb, Croatia
Received 29 October 2004; revised manuscript received 1 March
2005
Accepted 8 March 2005 Online 31 October 2005
Experimental investigations of laser-produced plasmas of Mg, Al and Si are described in
this work. Plasmas were produced by nanosecond (6 ns) nitrogen-laser pulses (l = 337.1 nm) with maximal energy density of about 1.1 J/cm2
and were studied by UV-VIS spectroscopy. Electron densities of the order of 1018
cm-3 and electron temperatures of about 1.5 eV in the produced plasmas have been found. Numerical modelling of target heating gives 4 - 5
times higher electron temperatures than determined in experiments. Significant change of
features of laser-produced plasmas on the three neighbouring elements has not been found.
We show that optical depth of the materials is the main parameter for plasma production.
PACS numbers: 52.50.Jm
UDC 533.9
Keywords: laser-produced plasma, Mg, Al and Si metal surfaces
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