Dependence of the electronic transition moment for the C3Δ–X3Δ system of TiO on the internuclear distance

Intensity distributions of eight vibronic bands associated with v′=0–3 for the C3Δ–X3Δ transition of TiO were observed by dispersed emission spectroscopy, and the variation of the electronic transition moment, Re(r), for the C3Δ–X3Δ system was determined as a function of the internuclear distance r; Re(r)∝{1−2.04(31)(r−r0)+195(43)(r−r0)3} (r0=1.65869 Å and 1.59130 Å⩽r⩽1.71214 Å). This r-dependence of Re(r) is discussed in terms of the polarization in the unpaired 10σ orbital.