抄録
The magnetic hyperfine structure of the J=3, K=2 line in the inversion spectrum of N14H3 has been studied by means of a molecular beam maser spectrometer. The results are analyzed by assuming (I·J) type interactions of the protons and nitrogen spins, and by taking the coupling scheme of angular momenta F2=I+J,F=IN+F2. The observed hyperfine structure shows two satellite lines on each side of the central line, corresponding to the transitions with ΔF2=0, ΔF=±1, and ΔF2=ΔF=±1. From the frequency measurements of these satellite lines the coupling constants of the (I·J) interactions are determined to be −17.67±0.3 kc for the protons, and 6.73±0.04 kc for the nitrogen nucleus. The theory predicts that the hyperfine components with ΔF2=0, ΔF=±1 consist of two groups of lines separated by abut 7 kc, while the experiments show that the separation is smaller than 4.5±0.5 kc. Effects of other types of interactions are taken into consideraction, but they give no appropriate interpretation of the discrepancy.
