English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We discuss the problem of the universal scalings in the double ionization ofatomic K-shell electrons caused by absorption of a single photon. Inparticular, we envisage the following questions: Under which conditions and upto which accuracy the universal scalings are realized? Does it make sense totalk about different physical mechanisms in the double-ionization process?Finally, we present also the theoretical analysis of recent experimentalmeasurements performed on neutral atoms. As a testing ground, QED perturbationtheory is employed.

About universal scalings in double K-shell photoionization