Profiles of (3/2) omega 0 emissions from laser-produced plasmas.

Abstract

Theoretical profiles of (3/2)${\ensuremath{\omega}}_{0}$ emissions from laser-produced carbon plasmas, at plasma temperatures varying from 600 to 250 eV, corresponding to laser intensities varying from 1.5\ifmmode\times\else\texttimes\fi{}${10}^{14}$ to 1.7\ifmmode\times\else\texttimes\fi{}${10}^{13}$ W/${\mathrm{cm}}^{2}$ have been calculated. The peak shifts of these emissions have been compared with the experimental results obtained using a 1.0641-\ensuremath{\mu}m Nd:glass laser and they are found to be in good agreement. Theoretical estimates of wavelength shifts taking into account the variation of plasmon wave number have also been compared with the experimental values. Profiles of (3/2)${\ensuremath{\omega}}_{0}$ emissions from planar slab targets of carbon, aluminum, and copper have been reliably measured and are compared with the theoretical estimates. Experimental results strongly suggest the saturation of two-plasmon--decay convective instability.