Abstract
A detailed analysis of the spectroscopy of the N22+ dication has been performed at the vibrational level. Two coincidence experiments have been used for that purpose: a pulsed VUV lamp associated with a magnetic bottle time-of-flight spectrometer (time-of-flight photoelectron–photoelectron coincidence method) and synchrotron radiation associated with a threshold electron selector (threshold photoelectrons coincidence method). Combined with ion detection, this last technique reveals, from one side, new properties of N22+ dissociation and, from the other side, what appears to be the first observation of fluorescence by this method allowing us to study the competition between fluorescence and dissociation in the D1Σu+ vibrational levels.
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