Dissociation of NH32+ induced by collision of 300 eV electrons with NH3
The dissociation of ammonia dications induced by 300 eV electron impact has been studied using a cold target recoil-ion momentum spectroscopy. Three regimes were found in the evolution of the produced NH 3 2+ ions, i.e. stable (long-lived), slowly dissociating (metastable), and promptly dissociating...
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| Veröffentlicht in: | The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2020, Vol.74 (6), Article 133 |
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| Hauptverfasser: | , , , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The dissociation of ammonia dications induced by 300 eV electron impact has been studied using a cold target recoil-ion momentum spectroscopy. Three regimes were found in the evolution of the produced NH
3
2+
ions, i.e. stable (long-lived), slowly dissociating (metastable), and promptly dissociating. Multiple dissociation channels of NH
3
2+
have been distinguished and identified by ion–ion coincidence technique. The kinetic energy release of the deprotonation dissociation channel NH
3
2+
→ H
+
+ NH
2
+
and the bond-rearrangement channel NH
3
2+
→ H
2
+
+ NH
+
have been obtained. The dynamic information and complex fragmentation pathways were analyzed by combining Dalitz plot and Newton diagram for the three-body dissociation channel NH
3
2+
→ H
+
+ NH
+
+ H. Strong correlation between the dynamic processes of H
+
, H loss, and the kinetic energy release was found.
Graphical abstract |
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| ISSN: | 1434-6060 1434-6079 |
| DOI: | 10.1140/epjd/e2020-10094-7 |