Single-charge transfer reactions of the ground and metastable states of Xe<sup>2+</sup> at 300K
N G Adams; D Smith; D Grief; N G Adams; Dept. of Space Res., Univ. of Birmingham, Birmingham, UK; D Smith; Dept. of Space Res., Univ. of Birmingham, Birmingham, UK; D Grief; Dept. of Space Res., Univ. of Birmingham, Birmingham, UK
Журнал:
Journal of Physics B: Atomic and Molecular Physics
Дата:
1979-03-14
Аннотация:
Measurements are reported of the reactions of the ground (<sup>3</sup>P) and metastable electronically excited (<sup>1</sup>D<sub>2</sub> and <sup>1</sup>S<sub>0</sub>) states of Xe<sup>2+</sup> ions with several atoms (Ar and Xe) and molecules (H<sub>2</sub>, N<sub>2</sub>, O<sub>2</sub> and CO<sub>2</sub>) at 300K. The data were obtained using a selected-ion-flow-tube (SIFT) apparatus. State selection was achieved by introducing suitable 'chemical-filter' gases into the flow tube. The rate coefficients for the reactions with the molecules were large with the exception of some of the reactions of the <sup>1</sup>S<sub>0</sub> state. Conversely, the atom reactions were generally slow except for the <sup>3</sup>P state reaction with Ar in which a favourable pseudo-energy resonance must occur. All the molecular reactions proceeded via single-charge transfer and in the <sup>1</sup>D<sub>2</sub> reactions with molecules, dissociation of the product ion was usually observed.
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