Abstract
Detailed analysis of the highest occupied molecular orbital band shape in the photoelectron spectrum of gaseous reveals a dynamic Jahn-Teller effect in the ground state of . The direct observation of three tunneling states asserts a geometry for the isolated cation, originating from a strong vibronic coupling. These results show that the ionic motion plays an important role in the electron-phonon interaction.
- Received 28 February 2002
DOI:https://doi.org/10.1103/PhysRevLett.89.045502
©2002 American Physical Society