Knowledge Bank

Metal compounds are of particular interest as they provide tests of simple models of transition metal $bonding.1,2$ We have measured the hyperfine structure of the $J=1\leftarrow 0$ rotational transition of CuCl in die v=0, 1 and 2 vibration, steles using the technique of MWFT spectroscopy. The molecules were produced in the gas phase by laser ablation of a solid sample of CuCl. The ablation took place just in front of the supersonic expansion nozzle which had the effect of nationally cooling the molecules, while leaving them vibrationally excited. The analysis of the hyperfine structure yielded improved values of the rotational and electric quadrupole constants as well as determining for the first time the nuclear spin-rotation $constant.3,4$ The vibrational dependence of these major parameters along with the physical implication will be discussed.