4 d → 4 f dipole resonance of the metal atom encapsulated in a fullerene cage: Ce@C82
2005; American Institute of Physics; Volume: 122; Issue: 6 Linguagem: Inglês
10.1063/1.1846674
ISSN1520-9032
AutoresKoichiro Mitsuke, Takanori Mori, Junkei Kou, Y. Haruyama, Yoshihiro Kubozono,
Tópico(s)Diamond and Carbon-based Materials Research
ResumoThe yield curves for photoions from Ce@C(82) are measured by using synchrotron radiation in the photon energy range from 90 to 160 eV. Parent Ce@C(82) (z+) and fragment ions C(60) (z+) and C(70) (z+) are observed in a mass spectrum (z=1 and 2). The yield curves for doubly charged ionic species exhibit broad resonance in the photon energy region of from 120 to 140 eV which is ascribed to the 4d-->4f giant dipole resonance of the encapsulated Ce atom. The total photoabsorption cross section of Ce@C(82) was determined from partial photoionization cross sections for formation of the parent and fragment ions to be 5.3(-1.1) (+1.8) and 19.6(-3.9) (+6.5) Mb at photon energies of 110 and 130 eV, respectively.
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