Photoionization of the neon–rare gas dimers NeAr, NeKr, and NeXe

Journal Article · Thu Dec 31 23:00:00 EST 1981 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.443441· OSTI ID:5532633

Pratt, Stephen T. ^[1]; Dehmer, Patricia M. ^[1]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)

The relative photoionization cross sections for the heteronuclear neon--rare gas dimers NeAr, NeKr, and NeXe were measured at a wavelength resolution of 0.15 Â for NeAr and 0.28 Â for NeKr and NeXe in the energy region between the molecular ionization threshold and the atomic ²P⁰_1/2 ionization limit of the heavier rare gas atom. The dimer ionization potentials are 15.685±0.004 eV for NeAr, 13.950±0.003 eV for NeKr, and 12.094±0.004 eV for NeXe. Combining these values with the known values of the atomic ionization potentials and the neutral ground state dissociation energies yields values of the A ²Σ⁺_1/2 ionic ground state dissociation energies of 0.079±0.004 eV for NeAr, 0.055±0.003 eV for NeKr, and 0.041±0.004 eV for NeXe. Molecular Rydberg structure, which shows strong similarities to the atomic structure in the region of the autoionizing Beutler--Fano resonances, has been partially analyzed in terms of Rydberg series converging to the B ²Π_1/2 state of the dimer ion. Vertical binding energies for the individual Rydberg states were determined based on the assumption that the Rydberg states dissociate to a neon atom in the ¹S₀ ground state plus a rare gas atom in an ns'[1/2]⁰₁ or nd'[3/2]⁰₁ excited state. Values of the vertical binding energies of the B ²Π_1/2 ionic state were determined from the series limits and are 0.022±0.002 eV for NeAr, 0.018±0.004 eV for NeKr, and 0.014±0.002 eV for NeXe.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5532633
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 7 Vol. 76; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ARGON COMPOUNDS
BINDING ENERGY
CORRECTIONS
CROSS SECTIONS
DIMERS
DISSOCIATION
ELEMENTS
ENERGY
ENERGY LEVELS
FLUIDS
GASES
GROUND STATES
IONIZATION
IONIZATION POTENTIAL
KRYPTON COMPOUNDS
NEON COMPOUNDS
NONMETALS
PHOTOIONIZATION
RARE GAS COMPOUNDS
RARE GASES
RESOLUTION
RYDBERG CORRECTION
XENON COMPOUNDS