Energies and Lifetimes of the Predissociative v = 14 and 15 Levels of the 1 State of H2

              H2 is the simplest molecule, consisting of two positively charged protons and two negatively charged electrons.  Therefore, understanding the dissociation properties of molecular hydrogen is important to understanding more complex systems.  Dissociation is the process in which molecules split into atoms.  The 2 state of H2 dissociates into H(1s) and H(2l) and can be represented by a potential energy curve which supports quantized vibrational and rotational levels.  The goal of my research this summer is to use Resonantly-Enhanced Multi-Photon Ionization (REMPI) spectroscopy to measure the energy and lifetimes of the different vibrational and rotational levels of the 3 state.  Although other levels will be explored, the main focus for the summer will be to study the v = 14 and 15 levels.  Using a time of flight mass spectrometer, multiple ionization spectra will be taken and analyzed.  Fano-profile fits to the peaks of the spectra will allow us to measure the linewidths and energies of the 4 state.  Using the linewidths, we can determine the lifetimes of the individual states.