Properties of negatively charged lithium ions and evaluation of the half-life of ${}^{7}$Be atom(s)

Abstract

Bound state properties of the four-electron lithium ion Li − in its ground 2 2 S−state and isotopesubsistuted 6 Li − and 7 Li − ions in their ground 2 1 S−state(s) are determined from the results of accurate, variational computations. Another closely related problem discussed in this study is accurate numerical evaluation of the half-life of the beryllium-7 isotope. This problem is of paramount importance for modern radiochemistry.