Selection Rules in Electron-Excited 4 d → 4 f Transitions at Intermediate Incident Energies
1983; American Physical Society; Volume: 51; Issue: 3 Linguagem: Inglês
10.1103/physrevlett.51.211
ISSN1092-0145
AutoresH. Netzer, Gregor Strasser, James A. D. Matthew,
Tópico(s)X-ray Spectroscopy and Fluorescence Analysis
ResumoElectron-excited $4{d}^{10}\ensuremath{\rightarrow}4{d}^{9}4f$ transitions in clean La metal and tetravelent Ce${\mathrm{O}}_{2}$ show systematic deviations from those observed in x-ray absorption. At intermediate primary energies simple selection rules allow a limited range of new singlet excitations, while triplet excitation becomes very prominent as the primary energy approaches threshold. With this technique a complete multiplet analysis of atomiclike core excitations has become possible for the first time.
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