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The Chemistry Department at the Lawrence Radiation Laboratory has been engaged in the use of digital control computers as an integral part of laboratory experiments. These computers not only provide control and data acquisition functions, but also result in improved accuracy and the ability to perform more advanced experiments. This paper describes two of the eight systems currently in use in the Chemistry Department. One is a PDP 8/S dedicated to one experiment at a time while the other is a time-shared PDP-7. The differences in operation and application of each will be surveyed and the advantages and disadvantages compared.

Microwave rotational absorption lines of the NF2 free radical have been observed with a highly sensitive K-band cavity spectrometer. The observed hyperfine splitting of these lines is consistent with a J type coupling scheme for the four different angular momenta involved in the NF2 radical.