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

Removal energies and hyperfine constants of the lowest four $ns, np_{1/2}$and $np_{3/2}$ states in Na, K, Rb and Cs are calculated; removal energies ofthe n=7--10 states and hyperfine constants of the n=7 and 8 states in Fr arealso calculated. The calculations are based on the relativistic single-double(SD) approximation in which single and double excitations of Dirac-Hartree-Fock(DHF) wave functions are included to all-orders in perturbation theory. UsingSD wave functions, accurate values of removal energies, electric-dipole matrixelements and static polarizabilities are obtained, however, SD wave functionsgive poor values of magnetic-dipole hyperfine constants for heavy atoms. Toobtain accurate values of hyperfine constants for heavy atoms, we includetriple excitations partially in the wave functions. The present calculationsprovide the basis for reevaluating PNC amplitudes in Cs and Fr.Comment: 27 pages, 1 figur

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Relativistic many-body calculations of energy levels, hyperfine constants, electric-dipole matrix elements, and static polarizabilities for alkali-metal atoms