Abstract
The aim of the present author is to study mechanisms of photo acoustic signal generation in water solution of dye for laser. The photo acoustic signal is generated by photon, produced during thermal energy dissipation. Since the excitation by laser does not result in significant quantities of intersystem crossing, the thermal energy produced in the water solution can be evaluated of either fluorescent radiation or non radiative transition. In the present work, quantum efficiency of fluorescent dye by N2 laser is measured and the thermal energy for the source of photo acoustic signal is evaluated.
