Many-electron effects in photoelectron core spectra

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

OSTI ID:5524578

Lindau, I

Many electron effects in photoelectron core spectra are now well-established phenomena. This paper will be centered around experiments where the tunability of synchrotron radiation has been utilized to study: 1. Photoelectron emission enhancement of the 5s and 5p partial photoionization crossections at and above the photoionization threshold for the 4d subshell of Ba. These many-electron effects can be studied as the photon energy is continuously tuned through the ionization thresholds of inner core levels; 2. The plasmon loss intensity as a function of the excitation energy of the photons for a few free-electron like elements (Al, Si). A strong enhancement is observed in the 5s and 5p partial crossections at and above the 4d ionization threshold in Ba. These resonances cannot be described in the framework of a one-electron model but are strong many-body effects. However, the more advanced many-body calculations can reproduce the 4d excitation as well as the enhancement in the outer 5s and 5p shells quite accurately. The intensity of the bulk plasmon loss structure was studied over a broad photon energy range from core levels of Si and Al. A clear trend is observed when the excitation energy is tuned from the ionization threshold and up. 50 references, 5 figures.

• Research Organization: Stanford Univ., CA
• OSTI ID: 5524578
• Report Number(s): CONF-820855-; TRN: 86-021533
• Journal Information: AIP Conf. Proc.; (United States), Vol. 94; Conference: International conference on X-ray and atomic inner-shell physics, Eugene, OR, USA, 23 Aug 1982
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM
EXCITATION
SOLIDS
PLASMONS
ABSORPTION SPECTRA
ALUMINIUM
CROSS SECTIONS
ENERGY LOSSES
KINETIC ENERGY
MANY-BODY PROBLEM
PHOTOIONIZATION
POLYCRYSTALS
SILICON
SYNCHROTRON RADIATION
ALKALINE EARTH METALS
BREMSSTRAHLUNG
CRYSTALS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY-LEVEL TRANSITIONS
IONIZATION
LOSSES
METALS
QUASI PARTICLES
RADIATIONS
SEMIMETALS
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory
656000 - Condensed Matter Physics