Search for Rydberg matter: beryllium, magnesium and calcium

Results are presented from theoretical investigations of Rydberg matter in beryllium, magnesium, and calcium by the Hartree-Fock method with allowance for the width of the atomic levels. It is shown that conditions can be created for the formation of Rydberg matter in beryllium, magnesium, and calcium in the optical range of the excitation energies. On the whole, calcium is the most perspective for the search of condensate of long-living excited states.