Photoabsorption cross section of C70 thin films from visible to vacuum ultraviolet.
Absolute photoabsorption cross sections of C(70) thin films were determined for hv values from 1.3 to 42 eV using photon attenuation. The spectrum showed a prominent peak of 1320 Mb at 21.4 eV with several fine structures mostly due to sigma-->sigma(*) single-electron excitation. The complex refractive index and complex dielectric function were calculated up to 42 eV with Kramers-Kronig analyses. From the present data of C(70) thin films, the cross section curve of molecular C(70) was calculated using the standard Clausius-Mossotti relation dealing with correction of the local electromagnetic field, with a plausible assumption that the anisotropy in molecular structure of C(70) was smeared out by molecular rotation at room temperature.
Yagi
H
H
The Institute for Molecular Science and Graduate University for Advanced Studies, Myodaiji, Okazaki 444-8585, Japan.
Nakajima
K
K
Koswattage
K R
KR
Nakagawa
K
K
Katayanagi
H
H
Mitsuke
K
K