APPEARANCE-POTENTIAL AND "CHARACTERISTIC-ELECTRON-ENERGY-LOSS SPECTROSCOPIES OF LANTHANUM - NEW INTERPRETATION OF RESONANT X-RAY-EMISSION

Using characteristic-electron-energy-loss spectroscopy and different appearance-potential techniques, we have obtained results which suggest a new interpretation of the resonant x-ray emission in lanthanum. Identification of structures in energy-loss and x-ray-emission spectra shows that the resonant x-ray emission is mainly due to characteristic transitions and not bremsstrahlung as believed earlier. © 1979 The American Physical Society.