Bremsstrahlung Resonances and Appearance-Potential Spectroscopy near the3dThresholds in Metallic Ba, La, and Ce

Abstract

instructive conversations on theoretical aspects of CDW states in linear chain systems, and to Pierre Mongeau and N. Phuan Ong on experimental aspects, in particular on NbSe 3 . I would like to thank Professor Paul Frampton for an illuminating conversation on his work and Dick Thompson for a useful discussion.

M-Series Soft-X-Ray Appearance-Potential Spectroscopy ofYb2Harte1, Szcezepanek2 1979Phys. Rev. Lett.

“…Wendin 16 B28, 117 (1977). This scaling behavior has been recently confirmed by G. Grinstein, P. Minnhagen, and A. Rosengren, to be published.…”

Polarizational bremsstrahlung in non-relativistic collisions

“…For the first time wide maxima in the emission spectra were observed experimentally in electron scattering from (solid) Ba, La and Ce [112,113]. Later these were explained theoretically [16] by relating the maxima to the virtual excitations of the 3d-subshell electrons. In [20] a powerful maximum was observed in the emission spectrum in electron-La collision.…”

Role of autoionization and characteristic decay in core-electron energy-loss spectra of La and Ce

“…͑While there is no 4 f electron in the ground state of La, there exists an excited bound 4 f electron below the Fermi level of the metal when a vacancy is created in the inner d shell. 28 It is this 4 f electron that is described as virtual. In Ce, this 4 f electron is distinguished from the one that is in the ground state-the valence band, because their wave functions and energies correspond to different ionic potentials.͒ This flip-flop interaction involving multiple scattering of the impinging electron E constitutes the autoionization decay channel.…”