“…Four electronic transitions give rise to BO molecular bands, viz., (a) A 2 P i / X 2 S + (A-X) transition or a-band (∼350-650 nm), (b) B 2 S + / X 2 S + (B-X) transition or b-band (∼230-330 nm), (c) C 2 P (f) / X 2 S + (C-X) transition or g-band (∼181-230 nm), and (d) B 2 S + / A 2 P i (B-A) transition or d-band (∼458-595 nm). [39][40][41] Since the a-band and the d-band overlap, theoretical simulation is challenging. The g-band, on the other hand, originates in a deep UV region, making it difficult to detect with the present detector system, which has poor quantum efficiency in the mentioned region.…”