Spatial distribution of YO molecules ejected from laser-ablated YBa2 Cu3 O7?x

Abstract

One-dimensional imaging laser-induced fluorescence spectroscopy has been used for in-situ measurements of spatial distributions of YO molecules produced during the ArF-laser ablation of YBa2 Cu3 O 7−x in vacuum and oxygen gas environment. The time-integrated angular distribution of particles ejected in vacuum has a cos n θ form, where 11 <n < 13. When oxygen gas was introduced, YO molecules were confined in a smaller volume, and temporal changes of their spatial distribution were interpreted in terms of blast-wave formation.