Charakterisierung von ionischen Zentren in Edelgasmatrizen mit Lumineszenz-und Photoelektronspektroskopie

Rare gas-rare gas, rare gas-Neon, D_2-Neon and noble metal-rare gas ionomers, molecules with one ionized atom, were studied with synchrotron radiation at HASYLAB at DESY. For the ionomers the process of formation and the determination of the emission energies are of major interest. One of the simplest ionomer transitions has the form: AB + h#nu# #-># A"+B + e"- #-># AB"+ + h#nu#'. Concerning the process of formation we are interested in the ionization energies of the rare gases. We are able to measure this by detecting the luminescence occurring in the last step of the process or with a photoelectronspectrometer measuring the electrons ejected from the sample. The ionization energies of the spin-orbit-partners of the molecule could be measured with luminescence spectroscopy by recording an excitation spectrum of the different ionomer emissions. To determine the ionization energy of a single rare gas atom in the matrix one has to correct the measured ionization energies by the binding energy of the molecule. The determined ionization energies are 15.97 Ar"+ ("2P_1_/_2), 15.59 Ar"+ ("2P_3_/_2), 14.61 Kr"+ ("2P_1_/_2), 13.92 Kr"+ ("2P_3_/_2), 13.46 Xe"+ ("2P_1_/_2) and 12.15 Xe"+ ("2P_3_/_2) for the rare gases in a neon matrix, 20.7 eV Ne"+ ("2P_3_/_2) for pure neon and 13.98 eV Ar"+ ("2P_3_/_2) for a pure argon solid. (orig.)127 refs.Available from TIB Hannover: RR 8919(2000-17) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman