Abstract
Three hyperfine components of the (2p3)2D5/2-2D3/2 fine-structure transition in N-14 I have been measured at 261685.567(100), 261496.844(80), and 261259.318(50) MHz (experimental uncertainties in parentheses). These frequencies are in good agreement with predictions based on the hyperfine and fine-structure parameters from a recent FIR laser magnetic resonance experiment. The three remaining allowed, undetected hyperfine components are much weaker but are predicted with an estimated uncertainty of better than 0.2 MHz. These accurate laboratory frequencies will permit a definitive search to be made for N2D in astronomical or atmospheric sources. 34 refs.
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