Laser photoelectron spectroscopy of ions

Technical Report · Sun Oct 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/5417620· OSTI ID:5417620

Ellison, G. B.

We use photoelectron spectroscopy to study the properties of negative ions and radicals. The essence of our experiment is to cross a 0.6 keV mass-selected ion beam (M{sup {minus}}) with the output of a CW laser,{Dirac h}{omega}{sub 0}. The resultant detached photoelectrons with kinetic energy, KE, are energy analyzed by means of a set of electrostatic hemispherical analyzers. Analysis of the photoelectron spectra enables us to extract molecular electron affinities, vibrational frequencies and electronic splittings of the final radical, M, as well as the relative molecular geometries of ions (M{sup {minus}}) and radicals (M). During the last three years we have completed the several studies: borane, amide, oxygen and nitric oxide, and ethylene and acetylene. We have also nearly completed a major overhaul of our photoelectron spectrometer that will permit us to prepare collisionally relaxed ions in a flowing afterglow ion source. 21 refs., 4 figs.

• Research Organization: Colorado Univ., Boulder, CO (USA). Dept. of Chemistry and Biochemistry
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-87ER13695
• OSTI ID: 5417620
• Report Number(s): DOE/ER/13695-T1; ON: DE90002873
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
AFFINITY
ALKENES
ALKYNES
AMIDES
BORANES
BORON COMPOUNDS
CHARGED PARTICLES
CHEMICAL BONDS
CHEMICAL REACTIONS
DOCUMENT TYPES
ELECTRON SPECTROSCOPY
ETHYLENE
HYDROCARBONS
ION SOURCES
IONS
LASER SPECTROSCOPY
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PROGRESS REPORT
SPECTROSCOPY