The excited states of Sr⁺CO: Photofragmentation spectra and ab initio calculations

Abstract

The first absorption band in the photofragmentation spectroscopy of Sr +CO, is recorded in the energy region between 15600 and 16200 cm -1. The spectrum is characterized by a sharp peak between two zones with broad peaks. In contrast to this, the second absorption band observed in the energy interval of 19000-23000 cm-1 shows a regular vibrational structure accompanied by a low intensity shoulder which covers the energy up to the dissociation. Electronic multi-reference configuration interaction calculations in the 2-D nuclear configuration space with the CO bond frozen provide a qualitative explanation of the spectra. © 2003 Elsevier B.V. All rights reserved.