01326nas a2200133   4500008004100000245015400041210006900195260000800264300002700272490000700299520074000306100001801046856012801064       2017                        eng d00aCalculation of the magnetic hyperfine structure constant of alkali metals and alkaline-earth-metal ions using the relativistic coupled-cluster method0 aCalculation of the magnetic hyperfine structure constant of alka  cJUL  aArticle Number: 0125100 v963 aThe Z-vector method in the relativistic coupled-cluster framework is used to calculate the magnetic hyperfine structure constant (A(J)) of alkali metals and singly charged alkaline earth metals in their ground state electronic configuration. The Z-vector results are in very good agreement with the experiment. The A(J) values of Li, Na, K, Rb, Cs, Be+, Mg+, Ca+, and Sr+ obtained in the Z-vector method are compared with the extended coupled-cluster results taken from Phys. Rev. A 91, 022512 (2015). The same basis and cutoff are used for the comparison purpose. The comparison shows that the Z-vector method with the single and double approximation can produce a more precise wave function in the nuclear region than the ECC method.1 aSasmal, Sudip  uhttps://library.ncl.res.in/content/calculation-magnetic-hyperfine-structure-constant-alkali-metals-and-alkaline-earth-metal