The photoionization of C2H2 has been studied by threshold photoelectron (TPE) spectroscopy and constant photoelectron energy (CPE) spectroscopy in the energy region between 11.3 and 20 eV, TPE spectroscopy has enabled a detailed observation of the first three electronic states of the ion as well as the non-Franck-Condon region. Further investigation by CPE spectroscopy at photoelectron energies between 0.2 and 3.7 eV has established that the main process occurring in this region is the autoionization of superexcited states of C2H2. A dynamic effect in the autoionization process has been proposed to explain the excitation of a quasicontinuum of vibrational levels of the ionic ground state in the region of 13 eV.
Avaldi, L., Dawber, G., Hall, R.i., King, G.c., Mcconkey, A.g., Macdonald, M.a., et al. (1995). PHOTOIONIZATION OF ACETYLENE NEAR THE THRESHOLD RID G-7348-2011. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 71(2), 93-105 [10.1016/0368-2048(94)02254-2].
PHOTOIONIZATION OF ACETYLENE NEAR THE THRESHOLD RID G-7348-2011
STEFANI, Giovanni
1995-01-01
Abstract
The photoionization of C2H2 has been studied by threshold photoelectron (TPE) spectroscopy and constant photoelectron energy (CPE) spectroscopy in the energy region between 11.3 and 20 eV, TPE spectroscopy has enabled a detailed observation of the first three electronic states of the ion as well as the non-Franck-Condon region. Further investigation by CPE spectroscopy at photoelectron energies between 0.2 and 3.7 eV has established that the main process occurring in this region is the autoionization of superexcited states of C2H2. A dynamic effect in the autoionization process has been proposed to explain the excitation of a quasicontinuum of vibrational levels of the ionic ground state in the region of 13 eV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
