skip to main content

SciTech ConnectSciTech Connect

Title: Photodissociation spectroscopy of the dysprosium monochloride molecular ion

We have performed a combined experimental and theoretical study of the photodissociation cross section of the molecular ion DyCl{sup +}. The photodissociation cross section for the photon energy range 35 500 cm{sup −1} to 47 500 cm{sup −1} is measured using an integrated ion trap and time-of-flight mass spectrometer; we observe a broad, asymmetric profile that is peaked near 43 000 cm{sup −1}. The theoretical cross section is determined from electronic potentials and transition dipole moments calculated using the relativistic configuration-interaction valence-bond and coupled-cluster methods. The electronic structure of DyCl{sup +} is extremely complex due to the presence of multiple open electronic shells, including the 4f{sup 10} configuration. The molecule has nine attractive potentials with ionically bonded electrons and 99 repulsive potentials dissociating to a ground state Dy{sup +} ion and Cl atom. We explain the lack of symmetry in the cross section as due to multiple contributions from one-electron-dominated transitions between the vibrational ground state and several resolved repulsive excited states.
Authors:
; ; ;  [1] ; ;  [2]
  1. Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States)
  2. Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States)
Publication Date:
OSTI Identifier:
22489643
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CONFIGURATION INTERACTION; CROSS SECTIONS; DIPOLE MOMENTS; DISSOCIATION; DYSPROSIUM; ELECTRONIC STRUCTURE; ELECTRONS; EXCITED STATES; GROUND STATES; MOLECULAR IONS; MOLECULES; PEAKS; PHOTOLYSIS; RELATIVISTIC RANGE; SPECTROSCOPY; TIME-OF-FLIGHT MASS SPECTROMETERS