Photoabsorption spectra of CFI and thermally dissociated CFI near the C 1s, I 3d and F 1s ionisation thresholds

Tanaka, Takahiro*; Hoshino, Masamitsu*; Kato, Hideki*; Harries, J.; Tamenori, Yusuke*; Ueda, Kiyoshi*; Tanaka, Hiroshi*

We report soft X-ray total ion yield and angular-resolved ion yield spectra of CFI in the C 1s, I 3d and F 1s ionisation regions, and tentatively assign the observed electronic states. Anisotropy in ion yield is observed only for the C 1s transition, indicating that the dipole moment for this transition is parallel to the C. The effusive source of CFI is heated to 800 K to produce a mixture of CF and I, and the resulting spectra are compared to those recorded at room temperature to reveal the first information on the inner-shell excitation of CF.