Abstract
We demonstrate an application of two-color resonant four-wave mixing (TC-RFWM) technique to produce and to detect vibrationally excited level (5 0 0) of the X 1A 1 state of SO 2 in a supersonic jet. A stimulated-emission pumping (SEP) scheme of TC-RFWM was employed, with probe (pump) and grating (dump) wavelengths in resonance with transitions A 1A 2(E band)–X 1A 1(0 0 0) and A 1A 2–X 1A 1(5 0 0), respectively. The double-resonance nature of this technique facilitates unambiguous vibronic assignments. From 94 pairs of transitions we measured energies of 20 rotational levels in X 1A 1(5 0 0) and obtained rotational parameters and vibrational energy of this level.
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