Photoionization of the outer shells of neon, argon, krypton, and xenon using the relativistic random-phase approximation

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.978· OSTI ID:5942572

Johnson, W R; Cheng, K T

Multichannel photoionization calculations using the relativistic random-phase approximation for the outer shells in the rare gases, neon, argon, krypton, and xenon, are presented. Total cross sections and partial cross sections for ns subshells are determined and compared with experiment and with alternative calculations at low energies. Branching ratios of /sup 2/P/sub 3/2/:/sup 2/P/sub 1/2/ cross sections which are sensitive to relativistic and correlation effects are presented and compared with experiment. Angular distribution asymmetry parameters ..beta.. determined for each subshell are found and compared with experiment; the differences between ..beta.. values for /sup 2/P/sub 1/2/ and /sup 2/P/sub 3/2/ subshells in krypton and xenon emphasize the importance of relativistic effects in outer subshells of heavy elements. Values of ..beta.. are given for outermost s electrons which show large relativistic effects near the ''Cooper minima'' of the corresponding partial cross sections. Eigenphases from the multichannel analysis are presented for argon to illustrate mathematical features of the present calculation.

• Research Organization: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
• OSTI ID: 5942572
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
BRANCHING RATIO
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
IONIZATION
KRYPTON
NEON
NONMETALS
P STATES
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
RANDOM PHASE APPROXIMATION
RARE GASES
TOTAL CROSS SECTIONS
XENON