The fragmentation of methane by impact of electrons and protons is studied experimentally
to reveal the mechanisms behind fragmentation by projectiles with opposite charges …

In this work, the inclusion of an Einzel-like lens inside the time-of-flight drift tube of a
standard mass spectrometer coupled to a gas cell—to study ionization of atoms and …

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 …

Direct detection of homonuclear diatomic dications using mass spectrometry has the intrinsic
inability to distinguish between fragments with the same mass-to-charge ratio, as is the case …

This work reports absolute cross-section measurements for the production of ethylene
dications by electron impact, with the energy ranging between 25 and 800 eV. Separation of …

Molecular dications are important metastable species present in a variety of environments
including, but not restricted to, planetary atmospheres and the human body when submitted …

Different mechanisms for the dication production of molecular nitrogen and oxygen are
reported here. It is shown that the N 2 dication is produced by direct double ionization, or TS …

The mechanisms for CH 2+ production, due to methane fragmentation by electron impact in
the 22 to 400 eV energy range, were investigated using the DETOF technique. Absolute …

The release of the highly reactive radical OH+ from the fragmentation of water by electron
impact is made mostly through the OH++ H 0 channel. This channel ejects suprathermal …

To date, the large majority of studies on molecular fragmentation by swift charged particles
have been carried out using simple molecules, for which reliable Potential Energy Curves …