"Generation of dye (Rhodamine B) laser by optical pumping and study its effect on solidstate nuclear track detector Cr-39"

Abstract

"The work includes the study of some optical and physical properties of dye (Rhodamine B) in ethanol solvent at different concentrations (1x10-5 - 5x10-3 mol/l), study and calculate the density and energy of the generated laser and its effect on nuclear track detector. The UV absorption spectra and the emission intensity of the dye fluorescence were determined at different concentrations. The results shows that the peaks of the intensity and wavelength of the absorption spectrum for rhodamine B depends on increasing the dye concentration, leading to increasing the interference between the absorption spectra and fluorescence (emission spectra). Also it was found that, the laser intensity decreased, when the concentration of rhodamine B increased, so we have an optimum threshold for dye concentration . "