Abstract
The optical spectrum of copper monofluoride in the yellow has been studied at sub-Doppler resolution to obtain information on the nuclear hyperfine interactions for both 63Cu and 19F nuclei for the upper state ( b 3Π). The experimental techniques employed were intermodulated fluorescence and microwave-optical double resonance, the electronic transition being excited with a tunable dye laser. The data obtained were fitted together with earlier Doppler-limited measurements to an effective Hamiltonian and values were determined for most of the molecular parameters involved. The b 3Π state of copper monofluoride is heavily perturbed by nearby electronic states and it is noteworthy that the effective Hamiltonian can reproduce the observations to within experimental error. Generally speaking, the Cu and F hyperfine parameters are consistent with an ionic description of the b[ su3Π state, arising from the configuration Cu + (3 d 9 4 s 1) F − (2 p 6). However, some anomalies arise. In particular, the parity-dependent hyperfine parameter, d, for the 63Cu nuclei is determined to be negative, contrary to expectation.
Published Version
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