Photoionization of I$^+$

TL;DR

This study uses the RPAE method to analyze the photoionization cross sections of I$^+$ ions, focusing on the 4d giant resonance, and finds excellent agreement with recent experimental data.

Contribution

It applies a newly developed RPAE method to calculate detailed photoionization cross sections for I$^+$, including all relevant shell couplings, providing accurate theoretical data.

Findings

Maximum cross section of 23.12 MB at 90.24 eV

Excellent agreement with experimental measurement at 90 eV

Comprehensive calculations of cross sections for multiple subshells

Abstract

Photoionization of the I$^+$ ion in the energy range of the 4d giant resonance has been studied using our recently developed random-phase approximation with exchange (RPAE) method. Photoionization cross sections for the I$^+$ $4d-\epsilon f, \epsilon p$, $5s-\epsilon p$, $5p-\epsilon s ,\epsilon d$ have been obtained for each term of the ground state. Calculations include all the intra-shell and inter-shell coupling among the 4d, $5s$, and $5p$ subshells. Our maximum cross section for the I$^+$ 4d giant resonance, 23.12 MB at 90.24 eV agrees excellently with the recent measurement, 23(3) at 90 eV.