Low-lying states of TeF: observation and assignment of the A and B states

Abstract

Low-lying electronic states of TeF, whose emission results when hydrogen telluride and fluorine are intimately mixed, are reported. The emission spectrum in the region 5500–8600 Å would appear to result from the A2Πi–X2Πi transition. Based upon this observation, the previously reported system in the region 3900–5200 Å must be reassigned to the transition B2Σ+–X2Πi. Observed spectra are presented and vibrational and electronic constants for the A2Π, B2Σ+, and X2Π electronic states are tentatively assigned.

Survey of Near-Infrared Emitters

“…Chemiluminescence in the B-X (380-540 nm) and A-X (560-860 nm) systems of TeF was observed when Te or H 2 Te reacted with F 2 Newlin et al 1981). The spectral emission from reaction of Te with F 2 is reported to be more intense than with the H 2 Te/F 2 system but photon yields and rates of production are unknown.…”