Quadrupole moment of the second 2/sup +/ state of /sup 184//sup ,//sup 186/W

We have performed a thick-target particle--..gamma.. coincidence experiment to measure q(2/sup +/'), the quadrupole moment of the second 2/sup +/ state, of /sup 184/ /sup 186/W. We have also determined q (2/sup +/') of /sup 186/W by an independent method involving particle spectroscopy. Neither the rotation--vibration nor the asymmetric rotor model can explain the results. Kumar--Baranger calculations agree with the trend.