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L x-ray intensity ratios L(e)/Lγ, Lα/Lγ and Lβ/Lγ for 92U and 90Th are measured by using 59.5keV incident photon energy at 110° and 125° scattering angles. The samples are located in the exteal magnetic field of intensities ±0.15T, ±0.30T, ±0.45T, ±0.60T and ±0.75T. The experimental results obtained for B = 0 are compared with the theoretical values calculated using Scofields tables based on the Hartree-Slater theory. The contribution to the alignment of the exteal magnetic field is discussed. It is observed that the L x-ray intensity ratios decrease with the increasing magnetic field intensity.