Abstract

In the current research, we investigated the absorption spectrum for R590 and C480 dyes in ethanol solvent for different dye solution concentrations of 10-4, 10-5 and 10-6M. These dyes have been prepared and studied before and after gamma irradiation (first, second ionization) using cesium-137 source with absorbed doses of 18.36 Gy (time exposure of 10 days) and 73.44 Gy (with time exposure of 40 days). We noticed that the absorption intensity was decreased with decreasing concentration, before gamma irradiation while the absorption spectrum peak shifted towards the short wavelength (blue shift). It was also found that the intensity of absorption spectrum increased and shifted the absorption spectrum peak towards the long wavelength (red shift) when irradiation exposure times and doses by gamma rays from (Cs137) source increased

Highlights

  • We investigated the absorption spectrum for R590 and C480 dyes in ethanol solvent for different dye solution concentrations of 10-4, 10-5 and 10-6M

  • Dye lasers were first discovered by Sorokin and Lankard in 1966 [1] and the applications for these lasers have appeared in industrial, military, and medical instruments

  • Dye lasers have made a large impact on society due to their lasing potential, high quantum yield, wavelength tenability and selfmode locking capabilities

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Summary

Introduction

Dye lasers were first discovered by Sorokin and Lankard in 1966 [1] and the applications for these lasers have appeared in industrial, military, and medical instruments. In industry, these lasers have been used in semiconductor fabrication, chemical purification, catalyst production, curing of pigment coatings, and combustion diagnostics. Gamma photons have no mass and no electrical charge Gamma photons are electrically neutral and do not steadily lose energy as they penetrate matter. Instead, they can travel some distance before interacting with an atom.

Materials and Methods
Results and discussion
18.36 Gy and the other 40 days dose of
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