Determination of the Interaction Potential and Rovibrational Structure of the Ground Electronic State of MgAr+ Using PFI-ZEKE Photoelectron Spectroscopy

Dominik Wehrli; Matthieu Génévriez; Carla Kreis; Josef A Agner; Frédéric Merkt

doi:10.1021/acs.jpca.9b10435

Determination of the Interaction Potential and Rovibrational Structure of the Ground Electronic State of MgAr⁺ Using PFI-ZEKE Photoelectron Spectroscopy

J Phys Chem A. 2020 Jan 16;124(2):379-385. doi: 10.1021/acs.jpca.9b10435. Epub 2020 Jan 7.

Authors

Dominik Wehrli¹, Matthieu Génévriez¹, Carla Kreis¹, Josef A Agner¹, Frédéric Merkt¹

Affiliation

¹ Laboratory of Physical Chemistry , ETH Zürich , CH-8093 Zürich , Switzerland.

PMID: 31834801
DOI: 10.1021/acs.jpca.9b10435

Abstract

The interaction potential characterizing the ground electronic state of MgAr⁺ has been determined from the photoelectron spectrum recorded from the a ³Π₀ metastable state of MgAr at high resolution by pulsed-field-ionization zero-kinetic-energy (PFI-ZEKE) photoelectron spectroscopy. The photoelectron spectrum provides information on the first ten vibrational levels of MgAr⁺ and leads to the determination of the adiabatic ionization energy of metastable MgAr (38 742.3(20) cm^-1), the ground state dissociation energy of MgAr⁺ (1254(60) cm^-1), and to the characterization of the rovibrational photoionization dynamics of MgAr.