A new satellite in the L-X-ray emission spectrum of tungsten-74

Using a 40 cm curved mica crystal spectrograph of the transmission type, the existence of a high frequency satellite at λ = 1268.84 X.U. in the L-emission spectrum of tungsten has been established for the first time. Based on the multiple ionisation theory, the satellite has been assigned to the transition L₂M₄ → M₄². According to the satellite nomenclature scheme proposed by Nigam and Mathur, this satellite would be designated Lβ₁₄.Kaufman's observation of a line at 1270.2 X.U. and its assignment to the octupole transition has been critically examined.