Photoionization of the outer shells of radon and radium: Relativistic random-phase approximation for high-z atoms. (Reannouncement with new availability information)

Technical Report · Fri May 01 04:00:00 EDT 1992

OSTI ID:177473

Deshmukh, P C; Radojevic, V; Manson, S T

Photoionization cross sections, branching ratios, and photoelectron angular distributions have been calculated for Ra (Z = 88) 7s, 6p, 6s, 5d, and 5p, and Rn (Z = 86) 6p, 6s, 5d, and 5p subshells within the framework of the relativistic random-phase approximation, including coupling between all of the relativistic channels arising from these subshells, in an effort to elucidate the interplay between relativistic and interchannel interactions at high Z where no experiments are extant. The results show that, aside from inducing structure in subshell cross sections, relativistic plus interchannel effects dominate the photoelectron angular-distribution asymmetry parameter and the branching ratio between spin-orbit doublets largely through the relativistic splitting of Cooper minima. This qualitatively confirms effects predicted by simple central-field calculations. Detailed explanations of the reasons for each of the structures are presented.

• Research Organization: Georgia State Univ., Atlanta, GA (United States). Dept. of Physics
• OSTI ID: 177473
• Report Number(s): AD-A--255458/2/XAB
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
ASYMMETRY
BRANCHING RATIO
CROSS SECTIONS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIUM
RADON