Hyperfine quenching of the 1s22s2p 3P0 level in berylliumlike ions

In this paper, we used the multiconfiguration Dirac-Fock method to compute with high precision the 1s22s2p 3P1--1s22s2p 3P0 separation energy in berylliumlike ions, including the relativistic contribution to electron-electron correlations and radiative corrections. The effect of the hyperfine interaction on both the energy and lifetimes of those levels has been evaluated. In the absence of nuclear magnetic moment the 3P0 level can decay to the ground state only by an E1-M1 transition, with a very low probability. We show that the hyperfine interaction increases dramatically the 3P0 transition probability