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Relaxation of neodymium in a weakly ionized expanding plasma
The laser resonance absorption technique has been used to determine the relaxation rate of electronically excited neodymium vapor during its expansion into vacuum. Significant increases of population into ground and 1128 cm/sup -1/ levels were found. Analysis shows that interaction between excited metastable atoms and electrons are much more important for relaxation than atom-atom collisions. The final population of neodymium appears to be frozen at a temperature lower than the surface temperature of melt.
Date:
June 21, 1977
Creator:
Chen, H. L.; Bedford, R.; Borzileri, C.; Brunner, W. & Hayes, M.
System:
The UNT Digital Library
Theoretical interpretation of angle- and polarization-dependent laser light absorption measurements
It was shown that recently published observations of angle- and polarization-dependent absorption of intense laser light are consistent with computer simulations of resonance absorption in a steepened plasma profile, with the addition assumption of a modestly rippled critical surface. About 10 percent absorption seems to be due to mechanisms not addressed in the simulations.
Date:
June 21, 1977
Creator:
Thomson, J. J.; Kruer, W. L.; Langdon, A. B.; Max, C. E. & Mead, W. C.
System:
The UNT Digital Library