Molecular fragmentation by electron impact investigated using a time delayed spectroscopic technique

A new technique based on time-of-flight mass spectrometry with delayed extraction, in which it is possible to determine the amount of ions with a given energy distribution, is presented. Unlike most techniques designed to measure the energy distribution of molecular fragments, its sensitivity is hig...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.488 (1), p.12042-7
Main Authors: Ferreira, Natalia, Sigaud, L, Montenegro, E C
Format: Article
Language:English
Subjects:
Collisions
Electron impact
Energy
Energy distribution
Extraction
Fragments
Ions
Kinetic energy
Mass spectrometry
Physics
Scientific imaging
Spectroscopy
Thermal energy
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Summary:A new technique based on time-of-flight mass spectrometry with delayed extraction, in which it is possible to determine the amount of ions with a given energy distribution, is presented. Unlike most techniques designed to measure the energy distribution of molecular fragments, its sensitivity is higher in the low range of the energy distribution, for ions with kinetic energy from thermal energy up to 3 eV. In this progress report we show that this technique is able to open new perspectives for mass spectrometry based on the well established TOF technique, presenting some selected results for collisions of electrons with energy between 15 eV and 400 eV with N2, O2 and CHClF2, which have interesting features involving their low energy fragments.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/488/1/012042