Three reaction systems in supersonic regime, i. e. (F+F2+IF), NH3 system, (F+F3),(NHa+CF3I) system and (F+F2),NH3 RI system for production of IF(B) are studied. The IF B-X emission is observed from OMA recordings in 450~750 nm range with 33 band heads. The luminescence intensity distribution of NH2, NH, NF(b), IF(B) along the gas flow direction support the mechanism of the production of IF(B)from each reaction system. The vibrational distributions of IF(B) are essentially Boltzmann ones. Implication for an IF chemical laser are also presented.