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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Theoretical energy levels of the $n = 1$ and $n = 2$ states of hydrogenlikeatoms with the nuclear charge numbers $1 \le Z \le 110$ are tabulated. Thetabulation is based on ab initio quantum electrodynamical calculationsperformed to all orders in the nuclear binding strength parameter $Z\alpha$,where $\alpha$ is the fine structure constant. Theoretical errors due tovarious effects are critically examined and estimated.

Lamb shift of $n = 1$ and $n = 2$ states of hydrogenlike atoms, $1 \le Z \le 110$