Observation et analyse vibrationnelle de nouveaux systemes de Bandes d’absorption de molecules lourdes dans l’ultraviolet lointain Cas de Sb2 et Bi2 / Observation and Vibrational Analysis of new Absorption Band Systems of Heavy Molecules in the Vacuum Ultraviolet. Case of Sb2 and Bi2

86 new absorption bands of the Sb2 molecule, all degraded to longer wavelenghts, have been observed in the vacuum ultraviolet. They belong to previously known systems, particularly the G ← X system discovered recently by flash photolysis, and extend them. The 30 new bands of Bi , located in the same region, form two new systems