Espectroscopia de fotoelétrons de limiares de átomos e moléculas

Química Nova

Maria Cristina Andreolli Lopes¹  Helder Couto¹  Cleber Dias Moreira¹  Helen Silva¹ 

[1] ,Universidade Federal de Juiz de Fora Instituto de Ciências Exatas Departamento de FísicaJuiz de Fora MG

关键词: threshold photoelectron spectroscopy;    synchrotron radiation;    photoionization;   

DOI  :  10.1590/S0100-40422006000100028

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License