Excitation mechanisms and characterization of a multi-ionic xenon laser

The emission characteristics of an ultraviolet-visible pulsed multi-ionic x enon laser were studied through time-resolved spectroscopy and the results were interpreted using a collisional-radiative theoretical model. This anal ysis includes more than 20 laser lines belonging to several ionic species ( Xe III-VIII), Depending on the experimental conditions, different temporal distributions of the laser lines and their corresponding spontaneous emissi ons can be observed. In particular, laser emission presents temporal oscill ations near threshold. Pumping processes for the laser transitions have bee n analyzed by using this model. Relativistic Hartree-Fock calculations of l aser level lifetimes and radiative transition probabilities were performed. Experimental laser gain for several transitions were obtained and compared with the theoretical values derived from the calculations.