Resonance and threshold effects in photoemission up to 3500 eV

Conference · Fri Jan 01 04:00:00 EST 1982 · AIP Conf. Proc.; (United States)

OSTI ID:5611617

Shirley, D A; Kobrin, P H; Lindle, D W; Truesdale, C M; Southworth, S H; Becker, U; Kerkhoff, H G

Beam Lines at the Stanford Synchrotron Radiation Laboratory (SSRL) now provide photon beams throughout the entire range 5-5000 eV, with a pulse structure very well-suited to time-of-flight (TOF) photoelectron spectroscopy. This facility, together with a TOF spectrometer, has been used to measure photo-emission cross sections sigma(element of) and asymmetry parameters ..beta..(epsilon) for several interesting systems. A summary of early results is given. Metal vapors (Ba, Cd, Mn, Hg) were studied using a high-temperature oven. Resonant photoemission was observed in several cases. Both sigma(epsilon) and sigma(epsilon) showed resonant behavior at 21.1 eV for several lines in Cd. The 4d, 5s, and 5p sigma(epsilon) line profiles differed dramatically, illustrating the detailed information about continuum states that is available from photoemission. Correlation satellites in photoemission from rare gases have been observed over a very wide energy range, including those seen in the K-shells of He, Ne and Ar and in the L-shell of Ne. The structure and preliminary intensity variations of these satellites will be discussed. Molecular shape resonances in C(ls), N(ls), and O(ls) photoemission were observed for the first time, in the molecules CO, CO/sub 2/, OCS, CF/sub 4/, N/sub 2/ and NO. Both the ..pi.. and sigma resonances were observed in KVV Auger emission, and the sigma resonances were studied by photoemission. 31 references, 18 figures.

• Research Organization: Lawrence Berkeley Lab., CA
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5611617
• Report Number(s): CONF-820855-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 94
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ASYMMETRY
BARIUM
CADMIUM
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
IONIZATION
MANGANESE
MEASURING INSTRUMENTS
MERCURY
METALS
MOLECULES
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHOTOIONIZATION
RESONANCE
SECONDARY EMISSION
SPECTROMETERS
SPECTROSCOPY
TIME-OF-FLIGHT SPECTROMETERS
TRANSITION ELEMENTS
VAPORS