On the absolute absorption cross-section of SF5CF3

The absolute absorption cross-sections of a recently discovered atmospheric gas, SF5CF3, have been measured at He I (21.22 eV) and Ne I (16.64 and 16.82 eV) photon energies using a VUV discharge lamp and a double ion chamber method. Absorption cross-sections of (9.52 ± 0.95) × 10−17 cm2 (He I) and (8.79 ± 0.88) × 10−17 cm2 (Ne I) were obtained and compared with data from other studies. The consequences for the cross-section at the hydrogen Lyman-α energy (10.20 eV) are discussed.