Evolution of overlapping resonances along an isoelectronic sequence

TL;DR

This paper investigates how overlapping near-threshold resonances in Be-like ions evolve along an isoelectronic sequence, analyzing their behavior as the atomic number Z varies and approaches infinity, with detailed focus on the 4s4p resonance.

Contribution

It provides new insights into the evolution of overlapping resonances across an isoelectronic sequence and details their behavior as Z increases, including the limit as Z approaches infinity.

Findings

Overlapping resonances change systematically with Z.

The 4s4p resonance behavior is characterized in detail.

Resonance behavior approaches a limit at infinite Z.

Abstract

Near-threshold resonances have been studied for Be-like ions with a focus on overlapping resonances among Rydberg series converging to different thresholds. The behavior of the overlapping as a function of Z and the approach to the limit of infinite Z are investigated. The 4s4p resonance is shown and discussed in detail as an example.