Ion kinetic energy distributions and cross sections for the electron impact ionization of ethyl tert-butyl ether

The kinetic energy distributions and the cross sections of the ions produced in the electron impact of ethyl tert-butyl ether (ETBE) have been studied by time of flight (TOF) mass spectrometry. The kinetic energy distributions have been deduced from the TOF peak shape analysis and a Montecarlo simulation method of the ion trajectories have been used to evaluate the collection efficiency of the spectrometer as a function of the ion initial kinetic energy. The measured ion yields have been corrected by the collection efficiency and the partial and total ionization cross sections of ethyl tert-butyl ether determined in the range 20-150 eV.