The optical-optical double-resonance technique has been used for measuremen
ts of emission spectra from separate vibrational levels of the beta 1(P-3(2
)) State of ICl (nu' = 12 and 14) populated via the A 1 (3)Pi state, The el
ectric dipole moment function of the beta --> A transition has been determi
ned over the range of the internuclear distance of 0.29-0.39 nm by means of
simulation of the emission spectra from the beta state.