Oscillator strength distribution of C60 in the time-dependent density functional theory

An oscillator strength distribution of the fullerene C60 molecule is calculated in the time-dependent density functional theory. A real-time method is employed to obtain the spectrum of a wide energy region extending up to 120 eV. The orbitals are expressed on the uniform grid points in the three-dimensional Cartesian coordinates inside a large cubic box area. The calculated distribution shows an intense peak centered at around 20 eV, accompanying a number of sharp structures on it up to 35 eV. Absolute values and gross features of the oscillator strength distribution are in reasonable agreement with measurements.