Mass spectrometric observation of the stable negative molecular ions HI− and H2I−
- 1 March 1982
- journal article
- letter
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 76 (5) , 2759-2761
- https://doi.org/10.1063/1.443225
Abstract
Using a 100 in. radius double focusing mass spectrometer we have detected the negative molecular ions HI− and H2I− produced in a Pennig ionization discharge source. The ions are identified by an absolute precision mass measurement, and their flight time through our machine is ≊10−4 sec, indicating the ions are stable with respect to autodetachment. This observation determines the electron affinity of HI to be positive and ≳0.007 eV.Keywords
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