Kinetic energy distributions and yields of the ions produced in the electron impact ionization of methyl tert-butyl ether (MTBE) have been measured by TOF mass spectrometry. The detection efficiency as a function of the initial ion kinetic energy has been carefully evaluated by means of a Montecarlo simulation of the experimental conditions. The resulting kinetic energy spectra show that almost all the heaviest ions are produced with quasi-thermal energy distribution, while the smaller fragment ions H+ and CH3+ exhibit in addition substantial non-thermal components. As a final result, the total ionization cross section of MTBE in the range 20-150 eV of the ionizing-electron energy has been derived and calibrated against the argon, chosen as a reference gas.
Dissociative electron impact ionization of methyl tert-buthyl ether: total ionization cross section and kinetic energy distributions
Di Palma TM;Apicella B;Wang X;
2004
Abstract
Kinetic energy distributions and yields of the ions produced in the electron impact ionization of methyl tert-butyl ether (MTBE) have been measured by TOF mass spectrometry. The detection efficiency as a function of the initial ion kinetic energy has been carefully evaluated by means of a Montecarlo simulation of the experimental conditions. The resulting kinetic energy spectra show that almost all the heaviest ions are produced with quasi-thermal energy distribution, while the smaller fragment ions H+ and CH3+ exhibit in addition substantial non-thermal components. As a final result, the total ionization cross section of MTBE in the range 20-150 eV of the ionizing-electron energy has been derived and calibrated against the argon, chosen as a reference gas.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
