2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189549The transition probabilities for the components of both the Balmer and Lyman $α$-lines of hydrogenic atoms are calculated for the nonrelativistic Schrodinger theory, the Dirac theory and the recently developed eight-component formalism. For large $Z$ it is found that all three theories give significantly different results.13 pages, uses iopart.clsHigh Energy Physics - Theorytext