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Title: Inner-shell photoionization and core-hole decay of Xe and XeF2

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4922208· OSTI ID:1392461
 [1];  [2]; ORCiD logo [1];  [1];  [3];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Wisconsin-Madison, Stoughton, WI (United States). Synchrotron Radiation Center (SRC)
  3. Univ. of Texas, Austin, TX (United States)
  4. Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712, USA

In this work, photoionization cross sections and partial ion yields of Xe and XeF2 from Xe 3d5/2, Xe 3d3/2, and F 1s subshells in the 660–740 eV range are compared to explore effects of the F ligands. The Xe 3d-$$ϵ$$f continuum shape resonances dominate the photoionization cross sections of both the atom and molecule, but prominent resonances appear in the XeF2 cross section due to nominal excitation of Xe 3d and F 1s electrons to the lowest unoccupied molecular orbital (LUMO), a delocalized anti-bonding MO. Comparisons of the ion products from the atom and molecule following Xe 3d photoionization show that the charge-state distribution of Xe ions is shifted to lower charge states in the molecule along with production of energetic F+ and F2+ ions. This suggests that, in decay of a Xe 3d core hole, charge is redistributed to the F ligands and the system dissociates due to Coulomb repulsion. The ion products from excitation of the F 1s-LUMO resonance are different and show strong increases in the yields of Xe+ and F+ ions. The subshell ionization thresholds, the LUMO resonance energies, and their oscillator strengths are calculated by relativistic coupled-cluster methods and agree well with measurements.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; CHE-1361031
OSTI ID:
1392461
Alternate ID(s):
OSTI ID: 1228186
Journal Information:
Journal of Chemical Physics, Vol. 142, Issue 22; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (5)

Charge transfer in dissociating iodomethane and fluoromethane molecules ionized by intense femtosecond X-ray pulses journal March 2016
Photoionization of the iodine 3d, 4s, and 4p orbitals in methyl iodide journal October 2018
Photoionization of the iodine 3d, 4s, and 4p orbitals in methyl iodide text January 2018
Hetero-site-specific X-ray pump-probe spectroscopy for femtosecond intramolecular dynamics text January 2016
Hetero-site-specific X-ray pump-probe spectroscopy for femtosecond intramolecular dynamics journal May 2016

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