Photoion--photoelectron coincidence study of Kr and Xe dimers

Journal Article · Mon May 01 04:00:00 EDT 1989 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.456614· OSTI ID:6450915

Norwood, K; Luo, G; Ng, C Y

The photoion--photoelectron coincidence (PIPECO) spectra for Kr/sup +//sub 2/ and Xe/sup +//sub 2/ in the wavelength regions of 825--970 and 900--1030 A, respectively, have been measured at different nozzle temperatures and stagnation pressures (P/sub 0/). The ionization energies (IE) for Kr/sub 2/ and Xe/sub 2/ to Kr/sup +//sub 2/(I(1/2)/sub u/) and Xe/sup +//sub 2/(I(1/2)/sub u/) determined by the PIPECO spectra are in excellent agreement with the results of previous photoionization experiments. The PIPECO measurements for Kr/sup +//sub 2/ and Xe/sup +//sub 2/ also provide lower limits for the IEs of Kr/sub 2/ and Xe/sub 2/ to Kr/sup +//sub 2/(II(1/2)/sub u/) and Xe/sup +//sub 2/(II(1/2)/sub u/). The PIPECO spectra for Kr/sup +//sub 2/ and Xe/sup +//sub 2/ display strong autoionization structures similar to those resolved in the corresponding photoionization efficiency spectra, indicating that a significant fraction of autoionizing electrons are slow electrons with near zero kinetic energies. The extreme weakness of the Kr/sup +//sub 2/(II(1/2)/sub u/) and

• Research Organization: Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011
• OSTI ID: 6450915
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:9; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CHARGED PARTICLES
COINCIDENCE METHODS
COMPLEXES
COUNTING TECHNIQUES
DIMERS
ELECTRON SPECTROSCOPY
IONIZATION
IONS
KRYPTON COMPLEXES
MOLECULAR IONS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
SPECTROSCOPY
XENON COMPLEXES