Strong resonance x-ray emission bands of lanthanum and thorium in the region of the 4d and 5d ionization thresholds

Journal Article · Wed Jul 01 00:00:00 EDT 1981 · Sov. Phys. - Solid State (Engl. Transl.); (United States)

OSTI ID:5937760

Zimkina, T; Shulakov, A; Braiko, A

Ultrasoft x-ray emission spectra of lanthanum and thorium in oxides were investigated using different exciting electron energies in the range of 4d and 5d ionization thresholds, respectively (spectral range from 60 to 140 eV). High-intensity emission bands were observed in the energy intervals corresponding to giant collective resonances in the absorption spectra of these two elements. The emission bands located beyond the ionization thresholds in the continuous parts of the spectra were of atomic origin and were associated with resonances of the 4d and 5d photoabsorption cross sections of the lanthanum and thorium atoms, respectively.

• Research Organization: Scientific-Research Institute of Physics at the A. A. Zhdanov State University, Leningrad
• OSTI ID: 5937760
• Journal Information: Sov. Phys. - Solid State (Engl. Transl.); (United States), Vol. 23:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM
EMISSION SPECTRA
X-RAY SPECTRA
THORIUM
ELECTRONIC STRUCTURE
OXIDES
RESONANCE
THRESHOLD ENERGY
ACTINIDES
CHALCOGENIDES
ELEMENTS
ENERGY
METALS
OXYGEN COMPOUNDS
RARE EARTHS
SPECTRA
360104* - Metals & Alloys- Physical Properties