Angle-resolved photoelectron spectroscopy of Cl/sub 2/ as a function of photon energy from 18 to 70 eV

Journal Article · Sat Jan 15 04:00:00 EST 1983 · J. Chem. Phys.; (United States)

OSTI ID:6791735

Carlson, T A; Krause, M O; Grimm, F A; Whitley, T A

Angle-resolved photoelectron spectroscopy using synchrotron radiation has been carried out on gaseous chlorine as a function of photon energy from 18 to 70 eV. From this data the partial cross sections and angular distribution parameter ..beta.. have been derived for the first three orbitals. For the lone pair orbitals 2..pi../sub g/ and 2..pi../sub u/, distinct minima are found in both the partial cross sections and ..beta.. values in the region of photoelectron energies from 30 to 40 eV. Less well-defined minima are also seen in the case photoionization for the nonlone pair orbital 5sigma/sub g/. These features are believed related to the Cooper minimum that arises from an atomic 3p subshell. Calculations have also been carried out on the partial cross sections and ..beta.. values using the multiple scattering X..cap alpha.. method. Comparison with experiment gives excellent qualitative agreement with regard to the ''Cooper minimum.'' The nature of the Cooper minimum in molecules and its usefulness in understanding photoelectron dynamics is discussed.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6791735
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 78:2; 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
ANGULAR DISTRIBUTION
BREMSSTRAHLUNG
CHLORINE
CROSS SECTIONS
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EXPERIMENTAL DATA
HALOGENS
INFORMATION
IONIZATION
NONMETALS
NUMERICAL DATA
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
SPECTROSCOPY
SYNCHROTRON RADIATION