Title

Relativistic effects in photoionization time delay near the Cooper minimum of noble-gas atoms

Document Type

Article

Publication Date

11-6-2014

Abstract

© 2014 American Physical Society. Time delay of photoemission from valence ns, np3/2, and np1/2 subshells of noble-gas atoms is theoretically scrutinized within the framework of the dipole relativistic random phase approximation. The focus is on the variation of time delay in the vicinity of the Cooper minima in photoionization of the outer subshells of neon, argon, krypton, and xenon, where the corresponding dipole matrix element changes its sign while passing through a node. It is revealed that the presence of the Cooper minimum in one photoionization channel has a strong effect on time delay in other channels. This is shown to be due to interchannel coupling.

Publication Title

Physical Review A - Atomic, Molecular, and Optical Physics

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