Two- and Three-Body Dissociation Dynamics of Temporary Negative Ion NF₃^–

Abstract

Dissociation dynamics of temporary negative ion NF3(-) formed in the low-energy (0.5 to 4.5 eV) electron attachment is investigated by the anion velocity slice imaging spectroscopy. The kinetic and angular distributions of the F(-) fragment indicate that this fragment is produced via two distinctly different dissociation channels, namely, two-body and three-body fragmentations, at the higher electron attachment energies. The anisotropic distributions of the fast F(-) ions are interpreted as the two-body dissociations relevant to the (2)E resonant state of NF3(-), whereas the slow F(-) can be produced via various three-body dissociations with the products of NF(X (3)Σ(-)) + F + F(-), NF(b (1)Σ(+)) + F + F(-), or N + F2 + F(-), depending on the electron attachment energy.

Dissociative electron attachments to ethanol and acetaldehyde: A combined experimental and simulation study

“…However, it is still a challenge to measure E int value due to the low energy resolution of the present anion VMI experiments; more awkwardly, E threshold and E k (tot) will be uncertain when the many-body dissociation pathway cannot be confirmed. 24 The momentum distributions of the O − /OH − ions produced in the DEA to ethanol at 6.0 and 9.0 eV are depicted in Fig. 2.…”

Electron momentum spectroscopy of NF3

“…[2] Recently, the electron impact ionization and dissociation, and the dissociative electron attachment of NF 3 were reported. [3][4][5][6] The electron momentum distribution of the highest occupied molecular orbital (HOMO) of NF 3 was reported by Brion et al [7] However, there is no detailed electron-momentum spectroscopy (EMS) result and no theoretical explanations for the whole valence region of NF 3 . Especially, so far, no detailed interpretation of the ionization of NF 3 based on high-level many-body theories has been reported.…”

Note: Coherent resonances observed in the dissociative electron attachment to carbon monoxide

“…In our previous experiments [6], the Newton sphere of the O − ions produced via Process II was too small to be sliced. According to the working principle of the ion velocity slice imaging technique, this Newton sphere was magnified by reducing the voltages on the pusher and the other electrodes in a proper ratio [10]. The kinetic energy of the ion fragment was obtained after calibration with the experimental data available in the literature.…”