Knowledge Bank

Laser photoelectron spectra of jet cooled p-difluorobenzene have been obtained using nanosecond and picosecond ionization pulses. Previously unobserved vibrational levels of the $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}B2g$ ion ground state have been recorded. Picosecond pulses have been used with pump - probe multiphoton ionization techniques and laser photoelectron spectroscopy to study the dynamics of the $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}B2u$ lowest excited state in p-difluorobenzene. Vibrational levels have been studied including several shown previously to exhibit intramolecular vibrational redistribution (IVR), as well as identifiable Fermi resonance states both above and below the reported IVR threshold.""