The photodepletion action spectrum of the (BaF)(2) cluster

摘要

The (BaF)(2) cluster has been produced in a supersonic expansion of a mixture of helium and CH3F which contained laser desorbed barium. Its photodepletion action spectrum measured by time-of-flight mass spectrometry displays low depletion cross sections (approximate to 3 Angstrom(2)) and a clear vibrational structure. This structure has been analyzed to obtain spectroscopic constants of the excited state involved in the photofragmentation of the cluster. Furthermore, its ionization potential (I.P.) has been determined to be 4.03 eV, and a discussion on the spectroscopy, structure, and dynamics crf the cluster is also presented. (C) 1998 American Institute of Physics. [S0021-9606(98)51310-4]. [References: 42]