Calculation of the K 4s, 7s, and 4p photoabsorption near threshold

2022/11/15 by Constantine E. Theodosiou, Theodosiou, Constantine E.
Chemistry · Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Laser Design and Applications #Laser-Matter Interactions and Applications #Spectroscopy and Laser Applications

paper · pdf · doi:10.48550/arxiv.2211.07831

openalex publication_date 2022/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We revisit the photoabsorption from the ground state of K, ending below and above the ionization threshold, with special emphasis on the shape of the photoionization cross section around the Cooper minimum. The present treatment, including core polarization effects and dynamic core polarizability matches very well the most accurate measurements resolving an older question about the width of the Cooper minimum. The photoabsorption from the excited 7s and 4p states is also calculated, along with 4p\rightarrownl optical oscillator strengths, and compared with recent experimental and theoretical data.

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