Determining repulsive potentials of InAr from oscillatory bound→continuum emission

Publisher Website
Google Scholar
Abstract
Oscillatory bound→continuum emission from vibrational levels v’=0–6 of the B(2Σ+) state of InAr onto the repulsive walls of the X 1(2Π1/2), X 2(2Π3/2), and A(2Σ+) electronic states, has been measured. In the B(2Σ+)→X 1(2Π1/2) spectrum, the intensity extrema have been associated with particular extrema and nodes of the radial wave functions of the emitting levels, and the resulting phase vs energy information directly inverted to yield a pointwise potential for the X 1(2Π1/2) state. Analysis of the observed peak heights then showed that on the range 2.9–3.8 Å the associated transition moment function is constant. The overlapping of the B(2Σ+)→X 2(2Π3/2) and B(2Σ+)→A(2Σ+) spectra prevents application of the above inversion procedure, but reliable estimates of these two final‐state potentials were obtained by matching quantum mechanical simulated spectra with experiment. The simulations also showed that the transition moment functions associated with all three transitions are of approximately equal strength.