DEUTERIUM QUADRUPOLE INTERACTION IN ND3

The hyperfine structure of the J = K = 1 and J = K = 4 inversion transitions of ND3 has been observed by molecular beam electric resonance with a resolution of approximately 300 Hz. The 4-4 spectrum confirms the hypothesis given by Garvey et al. [Mol. Phys., 31, 205 (1976)] of an error by a factor of 1.38 in the frequency calibration of the data by Basov and Bashkin [JETP Lett., 8, 188], bringing their results into agreement with observations on other states. The 1-1 spectrum gives a value of 159.0 kHz for the interaction 2δ ≡ ( eQD 2) ∂2V ∂x2 - ∂2V ∂y2. © 1979.