“…Discussion on feasible cause for blue radiation alternative to Kr 2 F. Chemistry of the reaction between Kr + (Kr * ) and NF 3 is complicated and gives rise to various species. It is known that NF 3 -containing mixtures do not recycle (e.g., in XeF laser), which is related to irreversible decomposition of NF 3 in reaction 2NF 3 → N 2 + 3F 2 resulting in formation of some amount of nitrogen (Mandl & Hyman, 1986). Indeed, of all the four possible immediate precursors for Kr 2 F * in Ar/Kr/F 2 mixture (KrF * , ArKrF * , Kr 2 + , and Kr 2 * (Boichenko et al, 2000), in order of decreasing importance), only two (KrF * and Kr 2 * ) are present in Ne/ Kr/NF 3 mixture: NeKrF * complex is not known to exist, whereas Kr 2 + is absent (see Fig.…”