MODIFICATION OF THE Xe 4d GIANT RESONANCE BY THE C₆₀ SHELL IN MOLECULAR Xe@C₆₀
Amusia M.Ya., Baltenkov A.S., Chernysheva L.V., Felfli Z., Msezane A.Z.

Поступила в редакцию: 28 Июня 2005

PACS: 32.80.Fb, 32.80.Hd

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It is demonstrated that in photoabsorption of the 4d¹⁰ subshell of a Xe atom in molecular Xe@C₆₀, the 4d giant resonance that characterizes the isolated Xe atom is distorted significantly. The reflection of photoelectron waves by the C₆₀ shell leads to profound oscillations in the photoionization cross section such that the Xe giant resonance is transformed into four strong peaks. Similarly, the angular anisotropy parameters, both dipole and nondipole, are also modified. The method of calculation is based on the approximation of the C₆₀ shell by an infinitely thin bubble potential that leaves the sum rule for the 4d-electrons almost unaffected, but noticeably modifies the dipole polarizability of the 4d-shell.