Abstract
Penning ionization of HCl upon collision with metastable He*(23S) atoms was studied by two-dimensional (collision-energy/electron energy resolved) Penning ionization electron spectroscopy and by classical trajectory calculations. Collision energy resolved studies enable us to obtain important information about stereo dynamical aspects on this reaction; sideways approaches of the He* atoms on H-Cl molecular axis play a dominant role in the ionization event for producing HCl+(X 2Πi, v′ = 0,1), and glancing collision is one of the dominant trajectories of the He* atoms to produce HCl+(A, 2Σ+). It was also found that the formation of vibrationally excited HCl+(X 2Πi, v′ > 1) through the unidentified HCl** Rydberg state was influenced by a strong attractive interaction, whereas the formation of the HCl** Rydberg state, dissociating to H(1s) and autoionizing Cl**(1D2 nl) atoms, was found to be affected by a repulsive interaction around the Cl end of the HCl molecule.
Original language | English |
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Pages (from-to) | 3759-3765 |
Number of pages | 7 |
Journal | Journal of Physical Chemistry A |
Volume | 106 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2002 Apr 18 |
Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry