2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54904The maximal acceleration corrections to the Lamb shift of one--electron atoms are calculated starting from the Dirac equation and splitting the spinor into large and small components. The results depend on $Z^8$ and a cut-off $Λ$. Sizeable values are obtained even at Z=1 for $Λ\sim a_0/2$, where $a_0$ is the Bohr radius. These values are compatible with theoretical and experimental results.LaTex, 14 pages, accepted for publication in Il Nuovo Cimento BHigh Energy Physics - Theorytext