Abstract
Boltzmann plot of laser produced plasma spectral emission of two Ag I-spectral lines at 827.35 and 768.77 nm was carried out. Surprisingly, two order of magnitude lower inherent transition probabilities of the two Ag I-spectral lines could be monitored using optical emission spectroscopy OES-technique. Nd: YAG laser at 532 nm and incident intensities varying from 1.76 to 3.14 GW/cm2 was used to induce plasma emission of silver targets. Six Ag I-lines were identified using echelle spectrograph facility at 546.54, 520.9, 827.35, 768.77, 328.06 and 338.28 nm in addition to the Hα-line. Corrections against optically thick plasma spectral line emission were routinely implemented while taking into consideration the sensitivity of spectrograph-ICCD combination. The new measured values of transition probabilities were verified during plasma expansion under different laser incident irradiances.
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