Vacuum-ultraviolet absorption and fluorescence spectroscopy of CF2H2, CF2Cl2, and CF2Br2 in the range 8-22 eV

Abstract

The vacuum-ultraviolet (VUV) absorption and fluorescence spectroscopy of CF2X2 was studied. Photoexcitation energies in a wide range were employed due to the versatility of the synchrotron radiation source. The electron peaks were assigned to Rydberg transitions in the VUV absorption spectra of CF2X2. Minor electron channels were represented by the photodissociation to emitting states of fragment species. Results depicted that the small size of hydrogen atom was related to the anomalous behavior of CF2H2 in forming H-H or H-F bonds in unimolecular fragmentation process.