Angular distribution of Xe 5s. -->. epsilonp photoelectrons near the Cooper minimum

Journal Article · Sun Nov 25 23:00:00 EST 1979 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.43.1661· OSTI ID:5542389

White, M G; Southworth, S H; Kobrin, P; Poliakoff, E D; Rosenberg, R A; Shirley, D A

Angular distributions of Xe 5s ..-->.. epsilonp photoelectrons were measured at energies near the Cooper minimum, using pulsed synchrotron radiation and a time-of-flight photoelectron spectrometer. The asymmetry parameters ..beta../sub 5s/ differ markedly from the nonrelativistic value of 2, particularly near the Cooper minimum, in agreement with theoretical models based on jj coupling. Comparison to recent relativistic calculations confirms the relativistic random-phase approximation model of Johnson and Cheng, establishing the importance of interchannel coupling in the 5s ..-->.. epsilonp photoionization process.

• Research Organization: Materials and Molecular Research Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5542389
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:22; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BREMSSTRAHLUNG
COLLISIONS
COUPLING
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
FERMIONS
INTERMEDIATE COUPLING
IONIZATION
J-J COUPLING
LEPTONS
NONMETALS
PHOTOEMISSION
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
PULSES
RADIATIONS
RANDOM PHASE APPROXIMATION
RARE GASES
RELATIVISTIC RANGE
SECONDARY EMISSION
SYNCHROTRON RADIATION
TIME-OF-FLIGHT METHOD
XENON