University of Tennessee Space Institute 1 article published in JoVE Engineering Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown Christian G. Parigger1, Alexander C. Woods1, Michael J. Witte1, Lauren D. Swafford1, David M. Surmick1 1Department of Physics, University of Tennessee Space Institute Time-resolved atomic and diatomic molecular species are measured using LIBS. The spectra are collected at various time delays following the generation of optical breakdown plasma with Nd:YAG laser radiation and are analyzed to infer electron density and temperature.