Final-state symmetry for the n = 2 states in photoionized helium determined by theory and experiment

Journal Article · Sun Feb 28 23:00:00 EST 1982 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.48.588· OSTI ID:5507007

Bizau, J M; Wuilleumier, F; Dhez, P; Ederer, D L; Chang, T N; Krummacher, S; Schmidt, V

Experiment and theory have been used to determine the final-state symmetry for the n = 2 state in photoionized helium. The angular asymmetry parameter ..beta.. has been measured as a function of photon energy by using angle-resolved photoelectron spectroscopy. From these measured ..beta.. values, which are a weighted average of ..beta../sub 2s/ and ..beta../sub 2p/, together with the theoretical values of ..beta../sub 2p/ and ..beta../sub 2s/, the ratio, R, of the partial 2p photoionization cross section to the partial 2s photoionization cross section has been obtained.

• Research Organization: Laboratoire pour l'Utilisation du Rayonnement Electromagnetique and Laboratoire de Spectroscopie Atomique et Ionique, Universite Paris Sud, F-91405 Orsay, France
• OSTI ID: 5507007
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 48:9; ISSN PRLTA
• 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
CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
GROUND STATES
HELIUM
IONIZATION
NONMETALS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
RARE GASES
SPECTROSCOPY
SYMMETRY
SYNCHROTRON RADIATION