; Ying Li-Jian
; Ni Jing-Fu
; Li Gang
; Wang Peng] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
; [Kurash Ibrahim
; Qian Hai-Jie] Chinese Acad Sci, Lab Synchrotron Radiat, Inst High Energy Phys, Beijing 100049, Peoples R China
The synchrotron radiation angle-resolved photoemission data of K3C60 single crystal film are analyzed, aiming at the photoionization cross-sections of the LUMO, HOMO and HOMO-1 bands in low photon energy region (14.5-27.5 eV). Many fine structures of the HOMO/HOMO-1 intensity ratios are observed, which support the general validity of a quantum chemistry model. However, the experimental data and the theoretical results have some disagreement in the energy positions and magnitudes of the fine structures, and the disagreement is more outstanding than the case of pure C-60. So the photoemission data Of K3C60 afford valuable experimental reference to further theoretical developments. The LUMO cross-section data, which cannot be discussed with the quantum chemistry description due to strong solid state effects, are also reported for further studies.