Abstract
An intensity of emission for the alkali atoms (potassium and rubidium) in the hydrogen-oxygen flame under action of a magnetic field is theoretically estimated with using quantum defect approximation in operator perturbation theory for atomic systems in external magnetic field. New estimates for the intensities of emission of the lines for К (D1: 42 P1/2 - 42 S1/2 and D2: 42 P3/2 - 42 S1/2) and Rb (1: 52 P3/2 - 52 S1/2 і 2: 62 P3/2 - 52 S1/2) are presented. The maximum value of the magnetic effect for D2 line of К atom for σ - polarization is equal 1.65, for π -polarization— 1.24. For Dl line the maximum value is equal 1.36 for both polarizations.
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