Photoionization-efficiency studies of some simple inorganic molecules

Technical Report · Wed Dec 01 00:00:00 EST 1982

OSTI ID:6791501

Linn, S H

High resolution (0.14 A FWHM) photoionization efficiency (PIE) measurements of HgCl/sub 2//sup +/, HgBr/sub 2//sup +/, and HgI/sub 2//sup +/ have been obtained by the supersonic molecular beam method. This study has yielded more precise values of the ionization energies (IEs) of the /sup 2/Pi/sub 3/2g/, /sup 2/Pi/sub 1/2g/, and /sup 2/D/sub +-5/2/ states of HgX/sub 2//sup +/ (X = Cl, Br, and I) to within +- 3 MeV. Lower resolution (1.4 A FWHM) studies of the HgX/sub 2/ fragment ions have been undertaken and values of the binding energies of HgX/sup +/ and HgX have been calculated from the measured appearance energies (AEs) of HgX/sup +/ and X/sup +/. In addition, PIE studies of the CO/sub 2/, N/sub 2/O, CO, N/sub 2/, NO, and O/sub 2/ dimers and clusters have been performed, yielding the IEs of (CO/sub 2/)/sub n=2-4/, (N/sub 2/O)/sub 2/, (CO)/sub n=2,3/, (N/sub 2/)/sub n=2,3/, and (NO)/sub n=2-6/, and the AEs of N/sub 2/O/sub 3//sup +/ from (N/sub 2/O)/sub 2/, O/sub 3//sup +/ from (O/sub 2/)/sub 2/, O/sub 5//sup +/ from (O/sub 2/)/sub 3/, and O/sub 7//sup +/ from (O/sub 2/)/sub 4/. Analysis of the PIE curves of (CO/sub 2/)/sub 2//sup +/ and (N/sub 2/O)/sub 2//sup +/ indicates that electronic predissociation may be an important dissociation mechanism for the CO/sub 2/*/sub (n)/.CO/sub 2/ and N/sub 2/O*/sub (n)/.N/sub 2/O Rydberg dimers. From the IEs of (NO)/sub n/, n=1-6, solvation energies of NO/sup +/ by one to five NO molecules have been determined. By analysis of the PIE spectra for O/sub 3//sup +/, O/sub 5//sup +/, and O/sub 7//sup +/, and by comparing their relative intensities, insights concerning the internal energy effects on ion-molecule half reactions have been obtained.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6791501
• Report Number(s): IS-T-1033; ON: DE83004860
• Resource Relation: Other Information: Thesis
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON DIOXIDE
PHOTOIONIZATION
CARBON MONOXIDE
MERCURY BROMIDES
MERCURY CHLORIDES
MERCURY IODIDES
NITROGEN OXIDES
OXYGEN
BINDING ENERGY
DIMERS
DISSOCIATION
EFFICIENCY
EXPERIMENTAL DATA
MOLECULAR IONS
PHOTON-MOLECULE COLLISIONS
PREDISSOCIATION
BROMIDES
BROMINE COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
DATA
ELEMENTS
ENERGY
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IODIDES
IODINE COMPOUNDS
IONIZATION
IONS
MERCURY COMPOUNDS
MERCURY HALIDES
MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTON COLLISIONS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena