Espectroscopia de fotoelétrons de limiares de átomos e moléculas
AUTOR(ES)
Lopes, Maria Cristina Andreolli, Couto, Helder, Moreira, Cleber Dias, Silva, Helen
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2006-02
RESUMO
A threshold photoelectron spectrometer applied to the study of atomic and molecular threshold photoionization processes is described. The spectrometer has been used in conjunction with a toroidal grating monochromator at the National Synchrotron Radiation Laboratory (LNLS), Brazil. It can be tuned to accept threshold electrons (< 20 meV) and work with a power resolution of 716 (~18 meV at 12 eV) with a high signal/noise ratio. The performance of this apparatus and some characteristics of the TGM (Toroidal Grating Monochromator) beam line of LNLS are described and discussed by means of argon, O2 and N2 threshold photoelectron spectra.
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