A fully relativistic multiconfiguration Dirac Fock method and the average level model with Breit and QED Corrections has been employed to study one photo quadrupole 1D- 1S spectrum energy separations, maximum transition probabilities and oscillator strengths of alkaline earth metal atoms for Sr、Ba and Ra. We consider significant relativistic effects, electron correlations and effective core potential framework on the electric quadrupole in Sr、Ba and Ra and first predict from theory one ph...
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