2013•Journal of Physics B Atomic Molecular and Optical PhysicsOpen access

Photoionization of the 5s subshell of Ba in the region of the second Cooper minimum: cross sections and angular distributions

Aarthi Ganesan, Sudha Deshmukh, G. B. Pradhan, V. Radojević, Steven T. Manson, P. C. Deshmukh

Abstract

The photoionization of Ba 5s in the high-energy Cooper minimum region has been investigated using the relativistic-random-phase approximation and the relativistic-random-phase approximation with relaxation. Comparison with recent experiment shows good agreement for the total cross section, but only qualitative agreement for the photoelectron angular distribution asymmetry parameter, β. The disagreement was traced to the omission of photoionization-plus-excitation channels arising from the 4d subshell.

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Key concepts: Photoionization, Asymmetry, Atomic physics, Random phase approximation, Excitation, Physics, Relaxation (psychology), Phase (matter)