Isotopic NS rotational spectra: 14N33S and 15N32S

The mm-wave spectra of the NS radical isotopomers 14N33S and 15N32S have been measured. Furthermore, new lines of the 14N34S species have been recorded. The radicals were generated in a dc glow discharge of a mixture of N2 and H2S. All new lines belong to the 2Π12 substates and were observed in natural abundance. The new data have been fitted simultaneously together with previously reported 14N32S and 14N34S lines to yield molecular constants, including the Born-Oppenheimer corrections δ01S and Δ01N and the 33S hyperfine constants d and a − (b + c)2.