Knowledge Bank

By use of a special parallel-plate microwave absorption cell capable of sustaining very high, uniform electric fields, very accurate Stark effect measurements have been made for several molecules. Among the molecules studied have been NNO and methylacetylene, and for these molecules it has been possible to determine their polarizability anisotropy. The values obtained are $3.15\times 10-24cm3$ and $2.7\times 10-24cm3$, respectively. Also the previously reported data for OCS have been refined and a value for the polarizability anisotropy of $4.5310-24cm3$ has been calculated.