Paulo Limao-Vieira

Department of Physics
New University of Lisbon
Quinta da Torre
2829-516 Caparica, Portugal

Despite the fact that, after formic acid (HCOOH), acetic acid is the second simplest organic acid, and therefore component of biological molecules, we are particularly interested on its electronic state spectroscopy by means of VUV photo-absorption, as important route to understand the effects of direct energy deposition by radiation that can lead to damage. The electronic state spectroscopy of acetic acid has been studied by VUV photo-absorption measurements in the energy range 3.5 – 11.0 eV. The high-resolution photon beam (~ 0.075 nm) has made possible the detailed analysis of the vibrational progressions, new assignments for the Rydberg series, where some new assignments are proposed for the first time. The result is compared with electron energy loss spectra (EELS)