Relative Delay among Br and Kr 4p, 4s, and 3d Photoionization

We study the photoionization Wigner-Smith (WS) time delays and dipole quantum phases of bromine and krypton using Kohn-Sham time-dependent local density approximation (TDLDA) [1] with the Leeuwen and Baerends exchange-correlation functional [2]. The focus of the investigation is electron correlations effects on the absolute as well as relative delays in emissions from both valence 4$p$ and 4$s$, and core 3$d$ levels. Particular emphasis is paid to unravel the role of correlations to induce structures in the delay as a function of energy at resonances and Cooper minima. The results should encourage attosecond measurements of iodine photoemission and probe the WS-temporal landscape of an open-shell atomic system. [1] Magrakvelidze et al, Phys. Rev. A \textbf{91}, 063415 (2015). [2] van Leeuwen et al, Phys. Rev. A 49, 2421 (1994).